Construction technology method of spraying anti-rust slurry on steel reinforcement framework

Abstract

The application discloses a construction technical method of spraying anti-rust slurry on a steel reinforcement cage, and comprises the following steps: step A, hoisting the prepared steel reinforcement cage to a storage area and cleaning dust on the steel reinforcement cage; step B, preparing cement high-molecular resin anti-rust slurry; and step C, uniformly spraying the cement high-molecular resin anti-rust slurry on the steel reinforcement cage by using a spraying machine, and naturally air-drying the steel reinforcement cage. The cement high-molecular resin anti-rust slurry is prepared by using cement slurry, instant gel powder and accelerator as raw materials and by controlling the ratio of the three within a specific range. The cement high-molecular resin anti-rust slurry is sprayed on the steel reinforcement cage and the spraying thickness is controlled within the range of 0.5-1.0 mm, so that the problem of rusting of the steel reinforcement cage during storage can be solved, the construction quality of the steel reinforcement cage can be optimized, and building materials can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reinforcing steel rust prevention. Specifically, it is a construction technology method for spraying rust-proof slurry on reinforcing steel framework. BACKGROUND

[0002] In road and bridge construction projects, reinforcing steel is used everywhere. However, due to the long project cycle of road and bridge construction projects, there is usually a long storage period between the procurement of reinforcing steel raw materials and the use of reinforcing steel. In addition, reinforcing steel occupies a large area, and it is also inevitable to temporarily store reinforcing steel outdoors after it is transported to the construction site. Therefore, rusting of reinforcing steel during the project construction process is a problem that cannot be avoided. Steel corrosion not only reduces its cross-sectional area, leading to a decrease in its physical and mechanical properties and even scrap, but also causes stress concentration due to rust pits, accelerating structural damage. Especially under impact load and cyclic alternating load, corrosion fatigue phenomenon occurs, greatly reducing the fatigue strength of steel, and even causing brittle fracture, which seriously affects the engineering quality. Currently, there is no mature rust prevention construction technology and method for reinforcing steel framework in the field of building construction. Therefore, it is necessary to find a construction technology method for spraying rust-proof slurry on reinforcing steel framework to solve the problem of rusting of reinforcing steel framework during storage. SUMMARY

[0003] To this end, the technical problem to be solved by the present application is to provide a construction technology method for spraying rust-proof slurry on reinforcing steel framework to solve the problem of rusting of reinforcing steel framework during storage.

[0004] To solve the above technical problems, the present application provides the following technical solutions:

[0005] The construction technology method for spraying rust-proof slurry on reinforcing steel framework comprises the following steps:

[0006] Step A: Store the prepared reinforcing steel framework hoisting device in the storage area and clean the dust on the reinforcing steel framework;

[0007] Step B: Prepare cement high-molecular resin rust-proof slurry;

[0008] Step C: Use a spraying machine to uniformly spray the cement high-molecular resin rust-proof slurry on the reinforcing steel framework, and then naturally air dry.

[0009] In the above construction technology method for spraying rust-proof slurry on reinforcing steel framework, the cement high-molecular resin rust-proof slurry is composed of cement slurry, instant gel powder and accelerator; the weight ratio of water to cement in the cement slurry is (0.9-1.1):1; and the weight ratio of the cement slurry, instant gel powder and accelerator is (95-105):0.02:0.9.

[0010] The construction technology method of the steel reinforcement framework sprayed anti-rust slurry, and the preparation method of the cement high polymer resin anti-rust slurry:

[0011] Step (B-1): mixing the cement slurry with water and cement as raw materials;

[0012] Step (B-2): adding the instant gel powder into the cement slurry, and stirring and mixing uniformly to obtain the mixed slurry;

[0013] Step (B-3): adding the accelerating agent into the mixed slurry, and stirring and mixing uniformly to obtain the cement high polymer resin anti-rust slurry.

[0014] In step (B-1) of the construction technology method of the steel reinforcement framework sprayed anti-rust slurry, when the cement slurry is mixed, the cement is added into water, and then low-speed stirring is performed at a speed of 100-200 rpm for 120 s, and paused for 15 s; and then high-speed stirring is performed at a speed of 400-600 rpm for 120 s; the cement is ordinary Portland cement;

[0015] In step (B-2), the instant gel powder is the 108 type building instant gel powder produced by Xi'an Yuhong Waterproof Material Co., Ltd., and the execution standard is Q / DG001-2009;

[0016] In step (B-3), the accelerating agent is the J85 type accelerating agent produced by Huaibei Xinda New Building Material Co., Ltd.

[0017] In step C of the construction technology method of the steel reinforcement framework sprayed anti-rust slurry, the spraying thickness of the cement high polymer resin anti-rust slurry on the steel reinforcement framework is 0.5-1 mm; and after the main body of the steel reinforcement framework is sprayed, the joint between the stirrup and the main reinforcement is supplemented.

[0018] The construction technical method of the steel reinforcement framework spraying anti-rust slurry, in step C, the spraying machine is a steel reinforcement framework anti-rust slurry special spraying machine; the steel reinforcement framework anti-rust slurry special spraying machine comprises a shell, a handle, a feeding guide plate, a top cover, a feeding baffle, an observation window, a discharge port, a water inlet, an air tank, an air compressor, a gas injection pipe, a screening mechanism and a mixing mechanism, the rear side of the shell is provided with the handle, the front end of the shell is provided with the observation window and the discharge port, the feeding guide plate and the feeding baffle are fixedly installed in the shell, the top cover is further fixed to the shell, the water inlet is arranged on the left side of the shell, the air tank is installed in the shell, the air outlet of the air tank is connected with the air compressor, the air compressor is installed in the shell, the outlet of the air compressor is connected with the gas injection pipe, the outlet of the gas injection pipe is arranged in the discharge port, the screening mechanism is installed in the shell and is used for screening cement, the mixing mechanism is further arranged in the shell and is used for stirring and mixing water and cement uniformly. When the steel reinforcement framework spraying anti-rust slurry raw materials such as cement are added, the feeding guide plate and the feeding baffle cooperate with each other to avoid impurities in the raw materials from entering the shell, so that primary screening is realized, then the steel reinforcement framework spraying anti-rust slurry raw materials are screened again by the screening mechanism, so that it is ensured that there is no impurity and agglomeration in the steel reinforcement framework spraying anti-rust slurry raw materials, then the cement is mixed with water by the stirring mechanism to form cement slurry, then the quick-dissolving powder and the accelerator are sequentially added to automatically prepare the steel reinforcement framework spraying anti-rust slurry, so that the damage of the steel reinforcement framework caused by the block-shaped impurities in the steel reinforcement framework spraying anti-rust slurry during spraying is effectively avoided.

[0019] The construction technical method of the steel reinforcement framework spraying anti-rust slurry, the screening mechanism comprises a stirring baffle, a shaking spring, a swing plate, a left sieve plate, a right sieve plate, a sliding clamping block and a swing assembly, the stirring baffle is fixed in the shell in a left-right symmetrical mode, the swing plate is rotatably connected in the shell in a left-right symmetrical mode, the other end of the swing plate is in contact with the stirring baffle, the shaking spring is arranged between the stirring baffle and the swing plate, the left swing plate is rotatably installed on the left swing plate, the right sieve plate is rotatably installed on the right swing plate, the left sieve plate and the right sieve plate are slidably connected through the sliding clamping block, the swing assembly is installed in the shell and is used for driving the swing plate to swing up and down.

[0020] The swing assembly comprises a screening motor, a belt pulley, a transmission belt and a rotating knocking block, the housing is internally provided with the screening motor, each stirring baffle is externally provided with a belt pulley, the screening motor drives the belt pulley to rotate through a gear transmission member, transmission belts are arranged between the belt pulleys on the left and right sides, each stirring baffle is externally provided with a rotating knocking block, and the belt pulley and the corresponding rotating knocking block are connected through the transmission belt. When the screening mechanism is used to screen solid raw materials such as cement and instant powder, the swing assembly can control the up-down swinging of the swing plate, the up-down swinging of the swing plate can make the left sieve plate and the right sieve plate slide left and right while swinging up and down, can break the agglomerated solid raw materials on the left sieve plate and the right sieve plate, and can also throw the residual sundries in the solid raw materials, so as to avoid the sundries from being blocked in the sieve holes, and improve the screening effect.

[0021] The above steel reinforcement framework spraying anti-rust slurry construction technology method, the mixing mechanism comprises a stirring motor, a straight gear, a transmission gear, a left stirring shaft, a right stirring shaft and a universal joint, the stirring motor is installed in the housing, the output shaft of the stirring motor is connected with the straight gear, the transmission gear and the universal joint are rotatably arranged on the feeding guide plate, the straight gear is engaged with the transmission gear, the straight gear is connected with the left stirring shaft through the universal joint, and the transmission gear is connected with the right stirring shaft through the universal joint. When the stirring motor is started to drive the left stirring shaft and the right stirring shaft to rotate, the rotating speed of the left stirring shaft and the right stirring shaft will gradually increase, so that the steel reinforcement framework spraying anti-rust slurry raw materials and water can be uniformly stirred and mixed.

[0022] The above steel reinforcement framework spraying anti-rust slurry construction technology method, the steel reinforcement framework anti-rust slurry special spraying machine further comprises a discharging frame, a sliding door and a rotary door opening mechanism, the discharging frame is installed on the front side in the housing, the sliding door is slidably arranged on the discharging frame, and the rotary door opening mechanism is arranged in the bottom plate of the housing, so that the cement cannot affect the operation of the rotary door opening mechanism; the discharging frame and the sliding door can block the steel reinforcement framework spraying anti-rust slurry raw materials during stirring, so that the steel reinforcement framework spraying anti-rust slurry raw materials cannot leak from the discharge port before being uniformly stirred, the left stirring shaft drives the rotary door opening mechanism to operate during stirring, but the rotary door opening mechanism cannot open the sliding door because the speed of the left stirring shaft is slow, and the left stirring shaft can drive the rotary door opening mechanism to open the sliding door when the stirring is completed, so that the function of automatically opening the sliding door is realized.

[0023] The rotating door opening mechanism comprises a conversion box, a rotating wheel, a moving rack, a reset spring, a transmission belt, a rotating disc, a moving clamping block, a tension spring and a gear ring, the conversion box is installed in the shell, the front end of the left stirring shaft is connected with the conversion box, the bottom of the conversion box is provided with the rotating wheel, the rotating disc is rotatably arranged in the shell, the rotating disc is connected with the rotating wheel through the transmission belt, the moving clamping block is slidably arranged in the rotating disc, the tension spring is arranged between the moving clamping block and the rotating disc, the two ends of the tension spring are fixed on the rotating disc and the moving clamping block respectively, the gear ring is also rotatably arranged in the shell, the connecting groove is formed in the gear ring, the moving rack is fixed on the sliding door, the moving rack is engaged with the gear ring, and the reset spring is arranged between the sliding door and the shell. When the left stirring shaft rotates, the rotating wheel rotates at all times, and drives the rotating disc to rotate at the same time, when the speed of the left stirring shaft reaches the maximum value, the centrifugal force of the moving clamping block in the rotating disc will be greater than the tension of the tension spring, so that the moving clamping block can be clamped into the connecting groove on the gear ring, the rotating disc drives the gear ring to rotate through the moving clamping block, and the gear ring drives the sliding door to move through the moving rack when rotating, so that the reinforced skeleton after spraying the rust-proof slurry can be sprayed out of the discharge port.

[0024] The construction technical method of the reinforced skeleton spraying rust-proof slurry, and the special spraying machine for the reinforced skeleton rust-proof slurry further comprises a clamping assembly for limiting the position of the sliding door; the clamping assembly comprises a sliding column, a supporting spring, a sliding rod, a connecting spring, a mechanical clamping block and an electric clamping block, the sliding column is slidably arranged in the rotating disc, the supporting spring is arranged between the sliding column and the shell, the sliding rod is slidably arranged in the shell, the connecting spring is arranged between the sliding rod and the shell, the mechanical clamping block is slidably arranged in the shell and connected with the sliding rod, the mechanical clamping groove and the straight clamping groove are formed in the moving rack, the mechanical clamping block can be clamped into the mechanical clamping groove, the electric clamping block is arranged in the shell and can be clamped into the straight clamping groove; and the rubber hose is arranged outside the discharge port. When the sliding door is completely opened, the clamping assembly can clamp the sliding door in the opened state, and at this time, the stirring motor can be turned off to reduce energy consumption; when the sliding door is completely opened, the mechanical clamping groove at the bottom of the moving rack is just moved to the top of the mechanical clamping block, at this time, the mechanical clamping block is pushed upward by the sliding rod and clamped into the mechanical clamping groove, so that the sliding door is prevented from being pulled by the reset spring, the mechanical clamping block plays a positioning role, and at this time, the electric clamping block is started, the electric clamping block is slid into the straight clamping groove, and after the stirring motor is turned off, the electric clamping block still clamps the sliding door in the original position, so that the sliding door is prevented from being pulled and reset by the reset spring.

[0025] The technical scheme of the present application has the following beneficial technical effects:

[0026] 1. The cement high polymer resin rust-proof slurry is prepared by using cement slurry, instant gelatinous powder and quick setting agent as raw materials, and controlling the ratio of the three within a specific range; the cement high polymer resin rust-proof slurry is sprayed on the steel reinforcement framework by using a spraying machine, and the spraying thickness is controlled within the range of 0.5-1.0 mm, so that the rusting problem of the steel reinforcement framework in storage can be solved, the construction quality of the steel reinforcement framework can be optimized, the building materials can be saved, and the construction cost can be reduced.

[0027] 2. The application also designs a steel reinforcement framework rust-proof slurry special spraying machine capable of automatically screening and blending cement net slurry; the automatic blending of the steel reinforcement framework rust-proof slurry can be realized by using the steel reinforcement framework rust-proof slurry special spraying machine, so that the steel reinforcement framework rust-proof slurry can be used immediately after being prepared, and the rust-proof effect of the steel reinforcement framework rust-proof slurry can be ensured; the steel reinforcement framework rust-proof slurry is sprayed by using the steel reinforcement framework rust-proof slurry special spraying machine, so that the uniformity of the steel reinforcement framework rust-proof slurry spraying can be improved, and the spraying efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The steel reinforcement framework spraying rust-proof slurry construction technical method process flowchart in the embodiment of the application;

[0029] Figure 2 The actual photo of the small mixer used in the embodiment of the application;

[0030] Figure 3 Another actual photo of the small mixer used in the embodiment of the application;

[0031] Figure 4 The actual photo of the multifunctional spraying machine used in the embodiment of the application;

[0032] Figure 5 Another actual photo of the multifunctional spraying machine used in the embodiment of the application;

[0033] Figure 6 Another actual photo of the multifunctional spraying machine used in the embodiment of the application;

[0034] Figure 7 The spraying preparation actual photo in the embodiment of the application;

[0035] Figure 8 The actual photo of the steel reinforcement cage spraying rust-proof slurry (after rain) in the embodiment of the application;

[0036] Figure 9 The comparison chart of the steel reinforcement cage without spraying rust-proof slurry and the steel reinforcement cage spraying rust-proof slurry in the embodiment of the application;

[0037] Figure 10 The rusting chart of the steel reinforcement cage covered by geotextile in the wet weather after rain in the embodiment of the application;

[0038] Figure 11 The actual photo of the steel reinforcement cage after spraying the rustproof slurry in the embodiment of the application;

[0039] Figure 12 The structure schematic diagram of the shell of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0040] Figure 13 The structure schematic diagram of the shell of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0041] Figure 14 The structure schematic diagram of the inside of the stirring baffle of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0042] Figure 15 The structure schematic diagram of the swinging assembly of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0043] Figure 16 The structure schematic diagram of the stirring mechanism of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0044] Figure 17 The structure schematic diagram of the bottom of the shell of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0045] Figure 18 The structure schematic diagram of the discharging blocking frame of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0046] Figure 19 The structure schematic diagram of the part of the rotating door opening mechanism of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0047] Figure 20 The structure schematic diagram of the conversion box of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0048] Figure 21 The structure schematic diagram of the bottom of the moving rack of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0049] Figure 22 The structure schematic diagram of the rotating disc of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0050] Figure 23 The structure schematic diagram of the rotating disc of the special spraying machine for the rustproof slurry of the steel reinforcement cage in the embodiment of the application;

[0051] The figure mark represents: 1 - shell; 101 - handle; 102 - feed guide plate; 103 - top cover; 104 - feed baffle; 105 - observation window; 106 - discharge port; 107 - water inlet; 2 - screening motor; 2001 - pulley; 2002 - transmission belt; 2003 - rotating knock block; 201 - stirring baffle; 202 - shaking spring; 203 - swing plate; 204 - left sieve plate; 205 - right sieve plate; 206 - sliding clamping block; 3 - stirring motor; 301 - straight gear; 302 - transmission gear; 303 - left stirring shaft; 304 - right stirring shaft; 305 - universal coupling; 306 - conversion box; 3061 - rotating wheel; 4 - air tank; 401 - air compressor; 402 - air injection pipe; 5 - discharge baffle; 501 - sliding door; 502 - moving rack; 5021 - mechanical clamping groove; 5022 - straight clamping groove; 503 - return spring; 504 - transmission belt; 505 - rotating disc; 5051 - moving clamping block; 5052 - tension spring; 5053 - sliding column; 5054 - supporting spring; 506 - gear ring; 5061 - connecting groove; 507 - sliding rod; 508 - connecting spring; 509 - mechanical clamping block; 510 - electric clamping block. DETAILED DESCRIPTION

[0052] This embodiment takes the Baigu section of the national highway 210 line as a construction pilot to conduct engineering test on the construction technology and method of the steel reinforcement cage spraying anti-rust slurry in the application.

[0053] 1. Introduction to engineering test project

[0054] The Baigu section of the national highway 210 line is located in Baotou City and directly connects Baiyun Obo and Guyang County in the regional road network, which is an important channel from Manbulakou, Baiyun and Guyang to Baotou and inland. The whole line adopts the standard construction of two-way four-lane first-class highway, and there are 45 large, medium and small bridges in the whole line design. The construction task of K187+700 to K200+000 section includes four large bridges, two medium bridges, 226 bored piles with a total pile length of 3929 meters, and 112 pier columns with a total column length of 1122 meters. The steel reinforcement of the pile foundation and pier column is processed into cages in the early stage, and then the steel reinforcement cage spraying anti-rust construction technology method, i.e. spraying cement high molecular resin anti-rust slurry treatment technology, is used. After using this technology, the steel reinforcement cage construction quality is optimized, the anti-rust spraying is efficient, the construction materials are saved, the cost and construction period of the construction of the steel reinforcement cage structure storage shed and the rust removal and reinforcement are saved, and it is green, energy-saving and environment-friendly.

[0055] 2. Characteristics of construction method

[0056] 2.1 Simple construction

[0057] After the steel reinforcement framework is completed, the cement high polymer resin rust-proof slurry is formed by mixing cement slurry with instant powder (produced by Xi'an Yuhong Waterproof Material Co., Ltd., model 108, standard Q / DG001-2009) and accelerator (produced by Huaibei Xinda New Building Material Co., Ltd., model J85), and the slurry is atomized and sprayed by a multifunctional spraying machine. This method solves the problem of rusting of the steel reinforcement framework, is simple and easy to implement, and meets the construction quality requirements.

[0058] 2.2 High construction efficiency

[0059] The spraying is performed by a multifunctional spraying machine, which is uniform and efficient.

[0060] 2.3 High construction quality

[0061] The sprayed steel reinforcement framework has the advantages of moisture resistance, rain resistance, and stable mechanical properties. The exposed steel reinforcement treated by the spraying of the cement high polymer resin rust-proof slurry does not have rust after several rainy days, the appearance and color of the steel reinforcement are consistent, the rust-proof effect is good, the sprayed coating does not have peeling and other phenomena, and the adhesion between the sprayed steel reinforcement framework and the concrete meets the construction requirements.

[0062] 2.4 Civilization and environmental protection

[0063] The national building construction environmental protection management regulations are strictly implemented.

[0064] The construction tools used in the spraying process are reasonably arranged according to the different requirements of environmental noise standards (decibels) during the day and night, and the steel reinforcement cage manufacturing and rust-proof slurry spraying work is arranged during the day.

[0065] Dust prevention and control: special personnel are assigned to clean up the construction site waste at any time, and appropriate water is sprayed to suppress dust, meeting the environmental protection requirements; a special waste storage area is set up at the construction site.

[0066] 2.5 Strong pertinence

[0067] Currently, there is no mature rust-proof construction technology and method for steel reinforcement framework in the field of building construction. This method successfully solves the problem of rusting of the steel reinforcement framework in storage and can guide the rust-proof construction of the same type of steel reinforcement framework.

[0068] 3. Applicable scope

[0069] This method is applicable to the rust-proof construction of steel reinforcement framework structures in special situations such as the inability to build a steel shed due to environmental factors or the limitation of the site in highway engineering construction.

[0070] 4. Process principle

[0071] The construction process principle of the method is to take the physical properties of the steel reinforcement framework as the starting point, combine the construction quality requirements, and determine the ratio of cement slurry, instant gel powder, and accelerator to form a cement high polymer resin rust-proof slurry through tests; the dust on the steel reinforcement framework is cleaned before spraying; then the spraying slurry is loaded into a multifunctional spraying machine for spraying (taking a steel reinforcement cage as an example): 1. spraying the outside of the steel reinforcement cage (the spraying thickness is about 0.5-1 mm), 2. spraying the inside of the steel reinforcement cage (the spraying thickness is about 0.5-1 mm), and 3. supplementary spraying at the nodes of the stirrup and main reinforcement.

[0072] 4.1 Selection of instant gel powder

[0073] A commercially available product (manufacturer: Donghong Waterproof Building Instant Waterproof Glue Powder) is used, and the main component is polyvinyl alcohol. Polyvinyl alcohol is an organic compound with the chemical formula [C2H4O] n , and its appearance is white flaky, flocculent or powdery solid, and it has no odor. It can be used to manufacture polyvinyl acetal, gasoline-resistant pipes and vinylon, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues, etc. In addition to the main chemical component iron (Fe), steel also contains small amounts of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), oxygen (O), nitrogen (N), titanium (Ti), and vanadium (V) elements. Because there are hydrogen and oxygen elements in the cement slurry, the steel also contains C elements, and the main component in the instant gel powder will not react with the steel.

[0074] 4.2 Application of instant gel powder

[0075] (1) Instant gel powder is a general-purpose copolymer powder, and as a product without water, it has good performance in cement and gypsum. It is an ideal multipurpose redispersible emulsion powder. (2) Instant gel powder can enhance the adhesion of the rust-proof slurry to the steel reinforcement framework, improve the bending strength and frost resistance of the steel reinforcement framework. (3) The application of instant gel powder in steel reinforcement framework rust prevention can improve the adhesion and bonding strength, making it more durable and resistant to wear and tear. (4) Instant gel powder is used for polypropylene roll pasting, wall and ceiling pasting, tile pasting, marble pasting, and interior and exterior wall facing material pasting additives; it is also used as a flowability additive for sprayed concrete mortar and a thickening agent for coatings.

[0076] 5. Construction process flow and operation points

[0077] 5.1 Construction process flow

[0078] The construction process flowchart of the embodiment is shown in Figure 1 .

[0079] 5.2 Comprehensive process operation points

[0080] 5.2.1 Raw material test

[0081] (1) Preparation of cement paste

[0082] Stir with cement paste mixer, wipe the mixing pot and stirring blade with a wet cloth first, pour the mixing water into the mixing pot, then carefully add the weighed 500g cement into the water within 5-10s to prevent water and cement from splashing; when mixing, first place the mixing pot on the pot seat of the mixer, raise it to the mixing position, start the mixer, stir at low speed for 120s, stop for 15s, at the same time, scrape the cement paste on the blade and pot wall into the middle of the mixing pot, then stir at high speed for 120s and stop.

[0083] Standard consistency water content determination steps:

[0084] ① Immediately after mixing, take an appropriate amount of cement paste and fill it into the test mold placed on the glass base plate at one time, the paste exceeds the upper end of the test mold, gently tap the paste that exceeds the test mold part with a straight edge knife about 25mm wide for 5 times to remove the pores in the paste, then slightly tilt the test mold at about 1 / 3 of the upper surface of the test mold and gently saw off the excess cement paste outward, and then gently wipe the top from the edge of the test mold once to make the cement paste surface smooth. During the operation of sawing off the excess cement paste and wiping, pay attention not to compact the cement paste.

[0085] ② After wiping, quickly move the test mold and base plate to the Vicat apparatus and center it under the test rod, lower the test rod until it contacts the surface of the cement paste, tighten the screw for 1-2s, then suddenly loosen it to make the test rod vertically and freely sink into the cement paste. Record the distance between the test rod and the base plate when the test rod stops sinking or 30s after releasing the test rod, then wipe it clean immediately after lifting the test rod.

[0086] ③ The entire operation should be completed within 90s after mixing. The cement paste with the test rod sinking into it and being 6mm±1mm away from the base plate is the standard consistency paste. The mixing water content is the standard consistency water content of the cement, which is calculated as a percentage of the cement mass, and the result is accurate to 1%. The reference standard is shown in the table below.

[0087] Table 1 Reference Standard

[0088] Serial number Standard name Standard number 1 Cement paste mixer JC / T 729 2 Cement paste standard consistency and setting time tester JC / T 727 3 Boiling tank for cement stability test JC / T 955

[0089] (2) Accelerator

[0090] The accelerator used is a commercially available product, J85 type accelerator produced by Huaibei Xinda New Building Material Co., Ltd. Add the accelerator to 400g cement according to the recommended dosage, mix evenly in the mixing pot, and then add 160mL water, stir quickly for 25s to 30s. Immediately fill into the round mold, manually vibrate several times, cut off the excess cement paste, and smooth the surface with a clean spatula.

[0091] The operation time should not exceed 50s from the time of adding water. The test mold filled with cement paste is placed under the cement paste standard consistency and setting time tester, the needle tip is in contact with the surface of the cement paste, the fixing screw needle on the tester rod is released quickly, and the needle is freely inserted into the cement paste. The reading of the pointer is observed, and the test is conducted every 10s until initial setting. The test is conducted every 30s until final setting.

[0092] 5.2.2 Mixing ratio: the greater the concentration of cement paste solution, the greater the viscosity, and the shorter the setting time.

[0093] Table 2 Cement paste mixing table

[0094]

[0095] According to the above table and the short setting time, the water-cement ratio of 1:1 is selected, and the reference mixing ratio weight ratio is cement: accelerator: quick-dissolving powder: water = 50:0.02:0.9:50;

[0096] The mixing ratio 1 is adjusted by adjusting the water amount: cement: accelerator: quick-dissolving powder: water = 50:0.02:0.9:45; and the mixing ratio 2 is adjusted by adjusting the water amount: cement: accelerator: quick-dissolving powder: water = 50:0.02:0.9:55. The reference mixing ratio has a setting time of 28 minutes, a moderate fluidity, the mixing ratio 1 has a small fluidity and a setting time of 13 minutes, and the mixing ratio 2 has a large fluidity and a setting time of 42 minutes. According to the site construction environment and site requirements, the weight ratio of cement: accelerator: quick-dissolving powder: water = 50:0.02:0.9:50 is selected.

[0097] 5.2.3 Mixing and spraying construction process

[0098] (1) Mixing

[0099] When mixing the cement polymer resin anti-rust slurry, automatic metering devices are used, various scales meet the requirements in terms of accuracy, and the metering instruments should be calibrated regularly and recalibrated after replacement.

[0100] The quality of various materials used to produce the cement polymer resin anti-rust slurry should be stable, and the quality of cement, quick-dissolving powder, and accelerator must be strictly controlled. When the quality of cement and accelerator changes, the mixing ratio design should be re-conducted. After the test mixing and test mixing verification, the mixing ratio can be put into production. Reliable measures should be taken to prevent material misuse and mixing during production, and the main materials should be stored in special warehouses.

[0101] (2) Spraying construction process

[0102] The surface of the steel reinforcement framework is cleaned as necessary, and the surface of the steel reinforcement is cleaned with a steel wire brush, especially the rusted steel reinforcement, which must be cleaned thoroughly.

[0103] First, the cement polymer resin anti-rust slurry is prepared according to the test ratio, and then loaded into the multifunctional spraying machine. Then, the cleaned steel reinforcement cage surface is sprayed with the anti-rust slurry by manual operation of the spraying machine. The spraying capacity should be adapted to the setting speed and spraying speed of the anti-rust slurry to ensure uninterrupted spraying and uniformity during spraying. ① The outside of the steel reinforcement cage is sprayed (the spraying thickness is about 0.5-1 mm), ② the inside of the steel reinforcement cage is sprayed (the spraying thickness is about 0.5-1 mm), and ③ the joint between the stirrup and the main reinforcement is supplemented. Finally, the cement polymer resin anti-rust slurry is uniformly sprayed on the surface of the steel reinforcement cage. The details that are not sprayed can also be brushed with a brush.

[0104] 5.3 Labor organization: according to the construction process, the main personnel are equipped as follows:

[0105] Table 3 Labor personnel allocation table

[0106] Serial number Process or type of work Number of people Work content 1 Rebar worker 5-10 Rebar cage making 2 Rust-proof slurry preparation 2 Preparation of rust-proof slurry according to mixing ratio 3 Spraying 3 Spraying rust-proof slurry on rebar cage

[0107] 6. Equipment and test instruments: the equipment and test instruments are shown in the following table.

[0108] Table 4 Main equipment and test instruments for steel reinforcement cage rust prevention spraying

[0109] Serial number Equipment name Specification Unit Quantity Remark One Main equipment 1 Small mixer NJ-160B Table 1 2 Multifunctional sprayer 06Pro Table 1 3 Crane QY25N5 Table 1 Two Test instrument 1 30kg Table Vernier caliper 1 2 100mm; 0.01mm Stick Stopwatch 1 3 One Setting time 1 Figure 12 to Figure 23

[0110] Note: The small mixer NJ-160B is a test cement paste mixer produced by Wuxi New Instrument Technology Co., Ltd. It mixes cement and water according to the standard to form a uniform test paste for measuring the standard consistency, setting time, and making stability test blocks of cement.

[0111] The spraying machine is a multifunctional spraying machine 06Pro produced by Zhengzhou Panshi Construction Equipment Co., Ltd. The working principle of the cement spraying machine is as follows: the mixed material is unloaded from the distribution mixer (or manually mixed and loaded), and then sent to the high-pressure chamber by the spiral feeding roller. The high-pressure rotor and high-pressure stator rotate to form high pressure, and the cement slurry is sent to the spray gun through the high-pressure conveying pipe. Another high-pressure air is introduced into the spray gun to blow, accelerate and spray the material out.

[0112] In addition, a self-designed steel reinforcement cage anti-rust slurry special spraying machine can also be used instead of the mixer and the multifunctional spraying machine 06Pro, which has better spraying uniformity and higher spraying efficiency. The structure diagram of the steel reinforcement cage anti-rust slurry special spraying machine is shown in Figure 12 .

[0113] For example, Figure 13 and Figure 13 to Figure 14As shown, the steel reinforcement framework anti-rust slurry special spraying machine includes a shell 1, a handle 101, a feeding guide plate 102, a top cover 103, a feeding baffle 104, an observation window 105, a discharge port 106, a water inlet 107, an air tank 4, an air compressor 401, a gas jet pipe 402, a screening mechanism and a mixing mechanism. The shell 1 is provided with the handle 101 at the rear side, and the user can move the equipment by pushing the handle 101. The front end of the shell 1 is provided with the observation window 105 and the discharge port 106. The observation window 105 can see the state inside the shell 1. The uniformly mixed steel reinforcement framework anti-rust slurry can flow out of the discharge port 106. The feeding guide plate 102 and the feeding baffle 104 are fixedly installed in the shell 1. The feeding guide plate 102 and the feeding baffle 104 can preliminarily screen the solid raw materials of the steel reinforcement framework anti-rust slurry, and remove the large impurities in the solid raw materials of the steel reinforcement framework anti-rust slurry. The top cover 103 is further fixed to the top of the shell 1. The water inlet 107 is arranged on the left side of the shell 1. The air tank 4 is installed in the shell 1. The air outlet of the air tank 4 is connected with the air compressor 401. The air compressor 401 is installed in the shell 1. The outlet of the air compressor 401 is connected with the gas jet pipe 402. The outlet of the gas jet pipe 402 is arranged in the discharge port 106. The air compressor 401 can spray the air in the air tank 4 out of the gas jet pipe 402, and at the same time, drive the steel reinforcement framework anti-rust slurry stirred in the shell 1 to be sprayed outwards. The screening mechanism is installed in the shell 1. The screening mechanism is used for screening the solid raw materials of the steel reinforcement framework anti-rust slurry. The mixing mechanism is further arranged in the shell 1. The mixing mechanism is used for stirring and mixing the water and the raw materials of the steel reinforcement framework anti-rust slurry uniformly.

[0114] Before spraying, the cement is mixed with water uniformly. The cement is poured into the feeding guide plate 102, and the cement slides into the screening mechanism in the shell 1 through the gap between the feeding guide plate 102 and the feeding baffle 104. Part of the impurities contained in the cement is clamped by the feeding baffle 104. The feeding guide plate 102 and the feeding baffle 104 have the effect of preliminary screening. Then the screening mechanism is started. The screening mechanism disperses the part of the cement lumps and makes them fall into the mixing mechanism. Then a certain amount of water is added to the shell 1 through the water inlet 107, and the mixing mechanism is started. When the water is added, the water level height can be observed through the observation window 105 at the front side of the shell 1. After the water and the cement are mixed and stirred uniformly by the mixing mechanism, the instant powder and the accelerator are added in turn and mixed and stirred uniformly to obtain the steel reinforcement framework anti-rust slurry. Then the air compressor 401 is started. The air compressor 401 compresses the air in the air tank 4 and sprays it out of the gas jet pipe 402. The gas jet pipe 402 sprays the gas to drive the mixed steel reinforcement framework anti-rust slurry in the shell 1 to be sprayed out of the discharge port 106. A spraying pipe can be connected at the discharge port 106 to spray the steel reinforcement framework anti-rust slurry on the steel reinforcement framework to realize the anti-rust function.

[0115] As Figure 15As shown, the screening mechanism includes a stirring baffle 201, a shaking spring 202, a swing plate 203, a left sieve plate 204, a right sieve plate 205, a sliding clamping block 206 and a swing assembly, the stirring baffle 201 is fixed inside the housing 1 symmetrically left and right, the stirring baffle 201, the feeding guide plate 102 and the housing 1 together separate the reinforcing framework anti-rust slurry raw materials, the swing plate 203 is rotatably connected inside the housing 1 symmetrically left and right, the other end of the swing plate 203 is in contact with the stirring baffle 201, when the swing plate 203 swings upward and resets downward, the swing plate 203 can still be in contact with the stirring baffle 201, the stirring baffle 201 and the swing plate 203 are provided with the shaking spring 202, the two ends of the shaking spring 202 are fixed on the stirring baffle 201 and the swing plate 203 respectively, the shaking spring 202 is used to pull the swing plate 203 to swing downward and reset, the left swing plate 203 is rotatably installed with the left sieve plate 204, the right swing plate 203 is rotatably installed with the right sieve plate 205, the left sieve plate 204 and the right sieve plate 205 are both provided with sieve holes, the sieve holes on the left sieve plate 204 and the right sieve plate 205 are blocked with each other in the initial state, the left sieve plate 204 and the right sieve plate 205 are slidably connected through the sliding clamping block 206, the swing assembly is installed inside the housing 1, and the swing assembly is used to drive the swing plate 203 to swing upward and downward.

[0116] The bagged cement or other reinforcing framework anti-rust slurry raw materials may mix some impurities at the construction site, most of which will be removed by the feeding guide plate 102 and the feeding baffle 104, and the cement or other reinforcing framework anti-rust slurry raw materials passing between the feeding guide plate 102 and the feeding baffle 104 will fall on the left sieve plate 204 or the right sieve plate 205, at this time, the sieve holes on the left sieve plate 204 and the right sieve plate 205 are blocked with each other, and the cement or other reinforcing framework anti-rust slurry raw materials cannot fall down temporarily, the swing assembly is started, the swing assembly will drive the two swing plates 203 to swing upward and downward at the same time, since the sliding clamping block 206 is arranged between the left sieve plate 204 and the right sieve plate 205, the left sieve plate 204 and the right sieve plate 205 can slide with each other, when the swing plate 203 swings upward, the left sieve plate 204 will slide to the right, and the right sieve plate 205 will slide to the left, in the process of sliding of the left sieve plate 204 and the right sieve plate 205, the sieve holes on the left sieve plate 204 and the right sieve plate 205 will overlap, so that the cement or other reinforcing framework anti-rust slurry raw materials on the left sieve plate 204 and the right sieve plate 205 fall downward, at the same time that the swing plate 203 swings upward, the height of the left sieve plate 204 and the right sieve plate 205 also rises at the same time, the cement or other reinforcing framework anti-rust slurry raw materials on the left sieve plate 204 and the right sieve plate 205 are also thrown upward, so as to avoid that the remaining impurities in the cement or other reinforcing framework anti-rust slurry raw materials block the sieve holes on the left sieve plate 204 and the right sieve plate 205, the left sieve plate 204 and the right sieve plate 205 slide left and right while moving upward and downward, which can break the cement or other reinforcing framework anti-rust slurry raw materials into pieces, and also can screen out the impurities, realizing the function of screening.

[0117] As Figure 13 shown, the swing assembly includes a screening motor 2, a pulley 2001, a transmission belt 2002 and a rotating knock block 2003, the shell 1 is internally provided with the screening motor 2, each stirring baffle 201 is provided with a pulley 2001 on the outer side, the screening motor 2 drives the pulley 2001 to rotate through a gear transmission, the gear transmission is a prior art, the transmission belt 2002 is arranged between the left and right pulleys 2001, the screening motor 2 can drive the pulley 2001 to rotate, each stirring baffle 201 is rotatably provided with a rotating knock block 2003 on the outer side, the pulley 2001 is connected with the corresponding rotating knock block 2003 through the transmission belt 2002, the pulley 2001 drives the knock block 2003 to rotate through the transmission belt 2002, and the knock block 2003 can swing the swing plate 203 upward when rotating.

[0118] During screening, the screening motor 2 is started, the screening motor 2 drives the pulley 2001 to rotate through the gear transmission, the gear transmission is a prior art, a set of intermeshing gears can be used to achieve the transmission effect in the embodiment, the pulley 2001 drives the pulley 2001 on the other side to rotate synchronously through the transmission belt 2002 when rotating, and the two pulleys 2001 can also drive the knock block to rotate through the transmission belt 2002, the knock block continuously pushes the swing plate 203 upward when rotating, and the swing plate 203 continuously falls under the driving of the shaking spring 202, so that the function of swinging the swing plate 203 up and down is realized.

[0119] As Figure 16 and Figure 17 shown, the mixing mechanism includes a stirring motor 3, a spur gear 301, a transmission gear 302, a left stirring shaft 303, a right stirring shaft 304 and a universal coupling 305, the stirring motor 3 is installed in the shell 1, the stirring motor 3 gradually increases in speed until the highest speed during stirring, the output shaft of the stirring motor 3 is connected with the spur gear 301, the transmission gear 302 and the universal coupling 305 are rotatably arranged on the feeding guide plate 102, the spur gear 301 is engaged with the transmission gear 302, the stirring motor 3 drives the transmission gear 302 to rotate through the spur gear 301, the spur gear 301 is connected with the left stirring shaft 303 through the universal coupling 305, the transmission gear 302 is connected with the right stirring shaft 304 through the universal coupling 305, and the left stirring shaft 303 and the right stirring shaft 304 jointly stir.

[0120] After the steel reinforcement anti-rust slurry raw materials are screened, the steel reinforcement anti-rust slurry raw materials will fall between the left stirring shaft 303 and the right stirring shaft 304, then water is added to the shell 1 through the water inlet 107, the water level stops after reaching the specified height, then the stirring motor 3 is started, the stirring motor 3 drives the transmission gear 302 to rotate through the straight gear 301, then the straight gear 301 drives the left stirring shaft 303 to rotate through the universal coupling 305, the transmission gear 302 drives the right stirring shaft 304 to rotate through the universal coupling 305, the left stirring shaft 303 and the right stirring shaft 304 are stirred at the same time, and the stirring motor 3 is turned off after a period of time to realize the function of mixing and stirring the water and the steel reinforcement anti-rust slurry raw materials evenly.

[0121] As shown in Figure 18 and Figure 19 , the spraying machine further comprises a discharge blocking frame 5, a sliding door 501 and a rotating door opening mechanism, the discharge blocking frame 5 is installed on the front side of the shell 1, the discharge blocking frame 5 is arranged on the inner side of the discharge port 6, the sliding door 501 is slidably arranged on the discharge blocking frame 5, the discharge blocking frame 5 and the sliding door 501 cooperate to prevent the steel reinforcement anti-rust slurry from leaking out of the shell 1, and the rotating door opening mechanism is further arranged in the shell 1, and the rotating door opening mechanism is used to open the sliding door 501.

[0122] The discharge blocking frame 5 is arranged in the shell 1, and the sliding door 501 is arranged on the discharge blocking frame 5, when the steel reinforcement anti-rust slurry raw materials and water are stirred, the sliding door 501 and the discharge blocking frame 5 jointly block the discharge port 106, the speed of the left stirring shaft 303 and the right stirring shaft 304 will gradually increase during the stirring process, when the stirring is completed, the left stirring shaft 303 will drive the sliding door 501 to move in cooperation with the rotating door opening mechanism, the sliding door 501 moves to expose the outlet of the discharge blocking frame 5, and the function of automatically opening the door after the stirring is completed is realized.

[0123] As shown in Figure 20 , Figure 23 and Figure 21 to Figure 23As shown, the rotating door opening mechanism comprises a conversion box 306, a rotating wheel 3061, a moving rack 502, a reset spring 503, a transmission belt 504, a rotating disc 505, a moving block 5051, a tension spring 5052 and a tooth ring 506, the conversion box 306 is installed in the shell 1, the front end of the left stirring shaft 303 is connected with the conversion box 306, the bottom of the conversion box 306 is provided with the rotating wheel 3061, the left stirring shaft 303 can drive the rotating wheel 3061 to rotate through the conversion box 306, the rotating disc 505 is rotatably arranged in the shell 1, the rotating disc 505 is connected with the rotating wheel 3061 through the transmission belt 504, the rotating wheel 3061 drives the rotating disc 505 to rotate through the transmission belt 504, the moving block 5051 is slidably arranged in the rotating disc 505, the tension spring 5052 is arranged between the moving block 5051 and the rotating disc 505, the two ends of the tension spring 5052 are fixed on the rotating disc 505 and the moving block 5051 respectively, the tension spring 5052 limits the moving block 5051 in the rotating disc 505, the tooth ring 506 is also rotatably arranged in the shell 1, the connection groove 5061 is formed in the tooth ring 506, the end of the moving block 5051 can be clamped into the connection groove 5061, the moving rack 502 is fixed on the sliding door 501, the moving rack 502 is engaged with the tooth ring 506, the tooth ring 506 drives the sliding door 501 to move through the moving rack 502, the reset spring 503 is arranged between the sliding door 501 and the shell 1, the two ends of the reset spring 503 are fixed on the shell 1 and the sliding door 501 respectively, the reset spring 503 can pull the sliding door 501 to move back to the original position.

[0124] When the left stirring shaft 303 rotates, the rotating wheel 3061 will rotate through the conversion box 306, the rotating disc 505 will rotate through the transmission belt 504 when the rotating wheel 3061 rotates, the moving block 5051 slidably connected in the rotating disc 505 will be affected by the centrifugal force, as the speed of the left stirring shaft 303 gradually increases, the centrifugal force acting on the moving block 5051 will gradually be greater than the tension of the tension spring 5052, the moving block 5051 will gradually slide outward, when the cement and water are uniformly mixed and stirred, the speed of the left stirring shaft 303 reaches the maximum value, in this case, when the moving block 5051 passes through the connection groove 5061 on the tooth ring 506, the moving block 5051 will be clamped into the connection groove 5061 on the tooth ring 506, the tooth ring 506 will rotate together with the rotating disc 505, the tooth ring 506 will drive the sliding door 501 to move and stretch the reset spring 503 through the moving rack 502 when the tooth ring 506 rotates, the sliding door 501 will expose the outlet on the discharge frame 5, realizing the function of automatic door opening.

[0125] As ​As shown, the spraying machine further comprises a clamping assembly for limiting the position of the sliding door 501; after the reinforcement skeleton rust-proof slurry raw material and water are mixed and stirred uniformly, the stirring motor 3 will be closed after a period of time, in order to avoid the sliding door 501 being pulled back by the reset spring 503, when the sliding door 501 is fully opened, the clamping assembly can clamp the sliding door 501 to avoid the sliding door 501 being pulled back by the reset spring 503 automatically.

[0126] The clamping assembly comprises a sliding column 5053, a supporting spring 5054, a sliding rod 507, a connecting spring 508, a mechanical clamping block 509 and an electric clamping block 510, the sliding column 5053 is slidably arranged in the rotating disc 505, the supporting spring 5054 is arranged between the sliding column 5053 and the shell 1, the supporting spring 5054 is in a contracted state in the initial state, the two ends of the supporting spring 5054 are fixed on the shell 1 and the sliding column 5053 respectively, the sliding rod 507 is slidably arranged in the shell 1, one end of the sliding rod 507 close to the rotating disc 505 is inserted in the sliding column 5053, the contact surface between the sliding column 5053 and the sliding rod 507 is an inclined surface, when the sliding column 5053 rises, the sliding rod 507 can be pushed away from the rotating disc 505, the connecting spring 508 is arranged between the sliding rod 507 and the shell 1, the two ends of the connecting spring 508 are fixed on the shell 1 and the sliding rod 507 respectively, the mechanical clamping block 509 is slidably arranged in the shell 1, the mechanical clamping block 509 is slidably connected with the sliding rod 507, the mechanical clamping groove 5021 and the straight clamping groove 5022 are arranged on the moving rack 502, the mechanical clamping block 509 can be clamped in the mechanical clamping groove 5021, the electric clamping block 510 is arranged in the shell 1, and the electric clamping block 510 can be clamped in the straight clamping groove 5022.

[0127] When the rotating disc 505 drives the sliding door 501 to move through the moving block 5051 and the gear ring 506, the moving block 5051 is out of contact with the sliding column 5053 in the rotating disc 505, and the mechanical block 509 cannot enter the mechanical clamping groove 5021 at this time. The sliding column 5053 and the sliding rod 507 are both in the original position and cannot move. When the sliding door 501 is completely opened, the moving rack 502 is out of contact with the gear ring 506, and the mechanical block 509 is just below the mechanical clamping groove 5021 at this time. The sliding column 5053 is pushed upward by the supporting spring 5054, and the sliding column 5053 moves upward to push the sliding rod 507 away from the rotating disc 505. The connecting spring 508 is stretched. When the sliding rod 507 slides away from the rotating disc 505, the mechanical block 509 is lifted upward by the sliding rod 507, and the mechanical block 509 is clamped into the mechanical clamping groove 5021. The sliding door 501 is clamped by the mechanical block 509, and the mechanical block 509 plays a positioning role. After the moving rack 502 is out of contact with the gear ring 506, the reset spring 503 can avoid pulling the sliding door 501 to move. At this time, the electric block 510 is started again, and the electric block 510 moves upward and enters the straight clamping groove 5022. At this time, the sliding door 501 is clamped by the electric block 510 and the mechanical block 509. When the stirring motor 3 is turned off, the moving block 5051 is pulled back into the rotating disc 505 by the tension spring 5052 at this time because the rotating disc 505 stops rotating. The sliding column 5053 in the rotating disc 505 is pressed downward, the supporting spring 5054 becomes a contraction state, the connecting spring 508 pulls the sliding rod 507 toward the rotating disc 505, and the mechanical block 509 slides out of the mechanical clamping groove 5021 without the support of the sliding rod 507. The electric block 510 still clamps the sliding door 501 in the original position, realizing the function of avoiding automatic resetting of the sliding door 501.

[0128] The rubber hose (not shown in the figure) is connected outside the discharge port 106, which facilitates workers to use the equipment to spray the reinforcing cage. The rotating door opening mechanism is arranged in the bottom plate of the shell 1, and the reinforcing cage rustproof slurry does not contact the rotating door opening mechanism to avoid the reinforcing cage rustproof slurry from blocking the rotating door opening mechanism and affecting the operation of the equipment.

[0129] 7. Quality control

[0130] 7.1 Quality control of instant gelatin powder

[0131] The selection principle of instant gelatin powder is:

[0132] (1) Using instant glue powder must not add other cellulose or equivalent glue, such as adding the effective components of glue powder is not right, can not play the effect of glue powder. (2) The use effect of instant glue powder in the proportioning should be based on test detection, such as: the amount of addition, stirring time. (3) Instant glue powder is recommended to be soaked with water, through the dissolution speed, viscosity, especially whether there is precipitation and the storage period, these can be used as the reference basis for the amount of instant glue powder added.

[0133] Instant glue powder quality control procedure: (1) Instant glue powder should be tested for its adaptability with cement paste before being added. (2) When different types of instant glue powder are used together, attention should be paid to their compatibility and the influence on the performance of cement paste. Test should be conducted before use, and only when the requirements are met can it be used.

[0134] 7.2 Quality control of instant glue powder in use

[0135] (1) The measurement of instant glue powder must be accurate, with an allowable error of ±2%. (2) The optimal addition method should be determined through test: cement → water → instant glue powder → accelerator. (3) If the instant glue powder is clumped due to moisture, it should be crushed and tested for failure and performance before use.

[0136] 7.3 Quality control of raw materials

[0137] (1) According to the type and model of cement used in the proportioning, batch testing should be conducted. (2) Water that cannot be drunk should be used for mixing cement paste only after passing water quality testing and corrosion resistance testing.

[0138] 7.4 Quality control during construction

[0139] (1) The quality of various materials used in the production of rust-proof slurry should remain stable, especially the quality of cement and instant glue powder must be strictly controlled. (2) When the raw materials change during the production of rust-proof slurry, test mixing should be conducted according to the proportioning to verify, and only when the test is normal can production be carried out; when the instant glue powder and accelerator materials change, the proportioning of rust-proof slurry should be redesigned. (3) Reliable measures should be taken to prevent the misuse of materials, and separate storage areas should be set up for main materials. (4) Before construction, all organizational preparations should be completed to ensure that the site preparation before spraying rust-proof slurry is in place, and the protection of finished products after construction is in place. (5) The speed and thickness of spraying should be strictly controlled during the spraying of steel reinforcement cage. (6) Attention should be paid to whether the nodes of steel reinforcement intersection and concentration are sprayed in place to prevent the occurrence of missed spraying and over-thickness spraying.

[0140] 7.5 The test items of steel reinforcement cage rust-proof spraying are shown in Table 5.

[0141] Table 5 Test items after spraying

[0142]

[0143]

[0144] 8、Safety measures

[0145] Construction project safety is the top priority of the enterprise, the responsibility is heavier than Mount Tai, must adhere to the "safety first, prevention first" principle and take the method of group prevention and group control, earnestly implement the "People's Republic of China safety production law", and effectively strengthen the management, ensure the safety and health of the workers in the production process. Strictly implement "highway engineering construction safety technical specification" JTG-F90-2015.

[0146] (1) When working at a height of 2 meters or more, wear a safety helmet and a safety belt. People with high, low blood pressure, weak vision, deafness, flat feet and other health abnormalities are strictly prohibited from working at a height. (2) Before construction, the spouting machine (air compressor, spray gun) should be checked comprehensively. If there is a problem, it must be repaired or replaced. (3) No one is allowed to stand in front of the spouting machine. Pay attention to the wind direction and try to reduce pollution and spray on others. (4) Strengthen the protection of workers. Dust masks and goggles must be worn when spouting. Appropriate labor protection facilities should be provided during work. If damaged, it must be repaired in time to ensure normal use. (5) The anti-rust spraying site should have safety protection measures, such as protective barriers and warning signs. (6) The open-air anti-rust construction work should be carried out in appropriate weather. Strong wind, rain and cold should not be operated. (7) Electric tools should be equipped with safety isolation transformer, leakage protection, controller and power connector. (8) The storage and operation site should be set up safety warning area and equipped with fire fighting facilities.

[0147] 9、Environmental protection construction measures

[0148] (1) The site layout is reasonable, and the materials, articles and tools are stacked in accordance with the requirements. (2) The site waste is cleaned up in time, and the quantity of recyclable materials is monitored and stored in the designated garbage station using the site material record table. The site is cleaned up after the work is completed, and random disposal is strictly prohibited. (3) The stored processing materials should not be mixed with other materials, and the storage site should be kept dry and covered to prevent dust. The materials should be stored away from the demolition site and should not be affected by the weather. (4) Burning and landfill of organic waste is strictly prohibited. (5) Control and management of raw materials and product protection are realized to control pollution sources. (6) Measures to ensure safety production, civilized construction, reduce environmental pollution and noise. (7) Construction activities that maximize resource conservation and minimize negative environmental impact, achieve energy saving and water saving. (8) Control and management of raw materials and product protection are realized to control pollution sources. The waste is collected and treated according to the "Construction site environment and health standards" (JGJ146-2013). (9) After construction, the plants damaged by construction activities are restored, and the landform is scientifically greened.

[0149] 10. Benefit analysis

[0150] The successful implementation of the rust-proof slurry spraying of the steel reinforcement framework has significant economic and social benefits: 3929 meters of pile foundation, with an average of 5.28m of steel reinforcement cage per meter of pile foundation 2 ; 1122 meters of pier column, with an average of 4.87m of steel reinforcement cage per meter of pile foundation 2 ; 3929x5.28+1122x4.87=26209.26m 2 .

[0151] Table 6: Cost of rust-proof spraying:

[0152]

[0153] Table 7: Cost of covering geotextile: The geotextile is calculated as being reused once, 26209.26m 2 ÷2=13104.63

[0154]

[0155] Table 8: Cost of open-air storage and manual rust removal:

[0156]

[0157] After comparison, the cost of using this method for rust-proof spraying is 105623.31 yuan less than covering geotextile and 101954.02 yuan less than open-air storage and manual rust removal.

[0158] In this embodiment, the Baigu section of the National Highway 210 line is located within the boundaries of Baotou City, directly connecting Baiyunebo and Guyang County in the regional road network, and is an important channel from Mandula port, Baiyun, Guyang to Baotou and inland. The entire project application example uses the standard construction of a four-lane highway in both directions, with a design of 45 large, medium and small bridges. The Baotou Highway Engineering Co., Ltd. National Highway 210 Line Baigu Highway Construction Test Project Department Team 1 is composed of the Fifth Company of the Baotou Highway Engineering Co., Ltd. and is responsible for the construction task of the K187+700 to K200+000 section, which includes four large bridges and two medium bridges. Construction has already begun. According to the engineering characteristics and standardized construction requirements, the steel bar processing site is located at K193+150 kilometers.

[0159] There are a total of 226 bored piles in the section, with a total pile length of 3929 meters, and 663T of steel reinforcement is used for the pile foundation. There are 112 pier columns, with a total column length of 1122 meters, and 335T of steel reinforcement is used for the pier columns. After the steel reinforcement cages for the pile foundation and pier columns were processed, we used a cement-based polymer resin anti-rust slurry treatment technology. The cement-based polymer resin anti-rust slurry had a significant bonding effect on the steel reinforcement cage after construction, and no rust was produced even after several rainy days. The bonding performance between the steel reinforcement cage and the concrete after the concrete pouring and pouring of the pier columns and pile foundations met the construction technical requirements.

[0160] The Baotou Highway Engineering Co., Ltd. undertook the reconstruction and expansion project of the secondary highway from Baiyun'ebo to Ming'an Town (Gonhuoduge) on National Highway 335. The starting point of the route in this application example is located at the intersection of the already completed National Highway 335 from Bailingmiao to Baiyun'ebo and the original County Road 077, passes through Narin Geli, Sugedi, Dalza, Ming'an Town, Saji, and Eheiyinghuduge, and connects with the starting point of the National Highway 335 from Gonhuoduge to Hailiutu in Bayannur City. The main line is 64.292 kilometers long, of which 61.74 kilometers is the construction mileage and 2.552 kilometers is the section. The main construction scope of the test project of this project is: roadbed, pavement, bridges and culverts, drainage protection, intersection, electromechanical and facilities along the line (including traffic safety, housing construction, and management and maintenance service facilities), greenery, and other engineering.

[0161] The steel reinforcement cage anti-rust spraying technology used by the Baotou Highway Engineering Co., Ltd. National Highway 335 Line Baiyun'ebo to Ming'an Town (Gonhuoduge) Section Highway Construction Test General Contracting Project Department in the construction of this test project has strong practicality and scientificity, and this construction method has achieved the following: high-quality construction quality of steel reinforcement cage, high efficiency of anti-rust spraying, saving of construction materials, saving of costs and construction period for the construction of steel reinforcement cage structure storage sheds and rust removal and reinforcement, and green energy-saving and environmental protection.

Claims

1. A construction technical method for spraying a rustproof slurry on a steel reinforcement framework, characterized in that, It comprises the following steps: Step A: hoist the prepared steel reinforcement framework to the storage area and clean the dust on the steel reinforcement framework; Step B: configure the cement polymer resin rust-proof slurry; the cement polymer resin rust-proof slurry is composed of cement slurry, instant glue powder and accelerator; the weight ratio of water to cement in the cement slurry is (0.9-1.1):1; the weight ratio of the cement slurry, instant glue powder and accelerator is (95-105):0.02:0.9; Step C: evenly spray the cement polymer resin rust-proof slurry on the steel reinforcement framework by using the spraying machine and naturally dry it; The spraying machine is a steel reinforcement framework rust-proof slurry special spraying machine; the steel reinforcement framework rust-proof slurry special spraying machine comprises a shell (1), a handle (101), a top cover (103), an observation window (105), a discharge port (106) and a water inlet (107); the rear side of the shell (1) is provided with the handle (101); the top of the shell (1) is further fixed with the top cover (103); the front end of the shell (1) is provided with the observation window (105) and the discharge port (106); the left side of the shell (1) is provided with the water inlet (107); The steel reinforcement framework rust-proof slurry special spraying machine further comprises a feeding guide plate (102), a feeding baffle (104), an air tank (4), an air compressor (401), a jet pipe (402), a screening mechanism and a mixing mechanism; the feeding guide plate (102) and the feeding baffle (104) are fixedly installed in the shell (1); the air tank (4) is installed in the shell (1); the air outlet of the air tank (4) is connected with the air compressor (401); the air compressor (401) is installed in the shell (1); the outlet of the air compressor (401) is connected with the jet pipe (402); the outlet of the jet pipe (402) is arranged in the discharge port (106); the screening mechanism is installed in the shell (1) and used for screening cement; the mixing mechanism is further arranged in the shell (1) and used for stirring and mixing water and cement uniformly; The screening mechanism comprises a stirring baffle (201), a shaking spring (202), a swing plate (203), a left screening plate (204), a right screening plate (205), a sliding clamping block (206) and a swing assembly; the stirring baffles (201) are fixedly arranged in the shell (1) in a left-right symmetrical manner; the swing plates (203) are rotatably connected to the shell (1) in a left-right symmetrical manner; the other end of the swing plate (203) is in contact with the stirring baffle (201); the stirring baffle (201) and the swing plate (203) are provided with the shaking spring (202); the left swing plate (203) is rotatably installed with the left screening plate (204); the right swing plate (203) is rotatably installed with the right screening plate (205); the left screening plate (204) and the right screening plate (205) are slidably connected through the sliding clamping block (206); the swing assembly is installed in the shell (1) and used for driving the swing plate (203) to swing up and down; The mixing mechanism comprises a stirring motor (3), a spur gear (301), a transmission gear (302), a left stirring shaft (303), a right stirring shaft (304) and a universal coupling (305), the stirring motor (3) is installed in the shell (1), the spur gear (301) is connected to an output shaft of the stirring motor (3), the transmission gear (302) and the universal coupling (305) are rotatably arranged on the feeding guide plate (102), the spur gear (301) is engaged with the transmission gear (302), the spur gear (301) is connected to the left stirring shaft (303) through the universal coupling (305), and the transmission gear (302) is connected to the right stirring shaft (304) through the universal coupling (305); The steel reinforcement framework rust-proof slurry special spraying machine further comprises a discharging baffle (5), a sliding door (501) and a rotating door opening mechanism, the discharging baffle (5) is installed on the front side in the shell (1), the sliding door (501) is slidably arranged on the discharging baffle (5), and the rotating door opening mechanism is arranged in the bottom plate of the shell (1) and is used for opening the sliding door (501); the cement does not affect the operation of the rotating door opening mechanism; The rotating door opening mechanism comprises a conversion box (306), a rotating wheel (3061), a moving rack (502), a reset spring (503), a transmission belt (504), a rotating disc (505), a moving clamping block (5051), a tension spring (5052) and a gear ring (506), the conversion box (306) is installed in the shell (1), the front end of the left stirring shaft (303) is connected to the conversion box (306), the bottom of the conversion box (306) is provided with the rotating wheel (3061), the rotating disc (505) is rotatably arranged in the shell (1), the rotating disc (505) and the rotating wheel (3061) are connected through the transmission belt (504), the moving clamping block (5051) is slidably arranged in the rotating disc (505), the tension spring (5052) is arranged between the moving clamping block (5051) and the rotating disc (505), the gear ring (506) is rotatably arranged in the shell (1), the connecting groove (5061) is formed in the gear ring (506), the moving rack (502) is fixed to the sliding door (501), the moving rack (502) is engaged with the gear ring (506), and the reset spring (503) is arranged between the sliding door (501) and the shell (1).

2. The construction technology method of steel reinforcement skeleton spraying antirust slurry according to claim 1, characterized in that, The preparation method of the cement high polymer resin rust-proof slurry comprises the following steps: Step (B-1): mixing cement slurry by taking water and cement as raw materials; Step (B-2): adding instant glue powder into the cement slurry, and stirring and mixing uniformly to obtain mixed cement slurry; Step (B-3): adding a quick-setting agent into the mixed cement slurry, and stirring and mixing uniformly to obtain the cement high polymer resin rust-proof slurry.

3. The construction technology method of steel reinforcement spraying antirust slurry according to claim 1, characterized in that, The swing assembly comprises a screening motor (2), a belt pulley (2001), a transmission belt (2002) and a rotating knock block (2003), the housing (1) is internally provided with the screening motor (2), each stirring baffle (201) is externally provided with a belt pulley (2001), the screening motor (2) drives the belt pulley (2001) to rotate through a gear transmission member, the belt pulleys (2001) on the left and right sides are provided with the transmission belt (2002) therebetween, and each stirring baffle (201) is externally rotatably provided with the rotating knock block (2003), and the belt pulley (2001) and the corresponding rotating knock block (2003) are connected through the transmission belt (2002).

4. The construction technology method for spraying the anti-rust mortar on the steel reinforcement cage according to claim 1, characterized in that, The steel reinforcement framework anti-rust slurry special spraying machine further comprises a clamping assembly for limiting the position of the sliding door (501); the clamping assembly comprises a sliding column (5053), a supporting spring (5054), a sliding rod (507), a connecting spring (508), a mechanical clamping block (509) and an electric clamping block (510), the rotating disc (505) is further provided with the sliding column (5053) slidingly arranged therein, the sliding column (5053) and the housing (1) are provided with the supporting spring (5054) therebetween, the housing (1) is further provided with the sliding rod (507) slidingly arranged therein, the sliding rod (507) and the housing (1) are provided with the connecting spring (508) therebetween, the housing (1) is further provided with the mechanical clamping block (509) slidingly arranged therein, the mechanical clamping block (509) and the sliding rod (507) are slidingly connected, the moving rack (502) is provided with a mechanical clamping groove (5021) and a straight clamping groove (5022), the mechanical clamping block (509) is clamped into the mechanical clamping groove (5021), the housing (1) is provided with the electric clamping block (510), and the electric clamping block (510) is clamped into the straight clamping groove (5022); the discharge port (106) is connected with a rubber hose.

5. The construction technology method for spraying the anti-rust mortar on the steel reinforcement cage according to claim 1, characterized in that, In step C, the spraying thickness of the cement high polymer resin anti-rust slurry on the steel reinforcement framework is 0.5-1 mm; after the main body of the steel reinforcement framework is sprayed, the node between the stirrup and the main reinforcement is supplemented.

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