Preparation process for improving performance of machine-made sand concrete

Abstract

The application belongs to the field of concrete production, and particularly relates to a preparation process for improving the performance of machine-made sand concrete, which comprises the following specific steps: S1: taking ether water-reducing agent, ether slump-retaining water-reducing agent, retarder, mud inhibitor and water in a proportion of 160:35:20:5:780 respectively, and compounding the above-mentioned materials to obtain a composite admixture; S2: taking 585 parts of machine-made sand and cleaning the machine-made sand by using a cleaning device, then drying the cleaned machine-made sand, and then mixing the treated machine-made sand with 200 parts of fine river sand, 25 parts of red mud and 1050 parts of stone for 30-50 seconds to obtain a mixture A; S3: taking 60 parts of fly ash, 60 parts of mineral mud and 240 parts of cement, and adding the mixture A to obtain a mixture B after stirring and mixing for 40-50 seconds; the composite admixture is obtained by compounding the above-mentioned materials in a proper proportion, and the machine-made sand concrete is prepared by using a proper proportion, so that the slump retention performance of the concrete is improved, and the final setting time of the concrete is not greatly affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of concrete production, and particularly relates to a preparation process for improving the performance of machine-made sand concrete. BACKGROUND

[0002] Machine-made sand refers to sand processed by a sand making machine and its auxiliary equipment, and can be processed into sand of different rules and sizes according to the requirements of different processes.

[0003] Machine-made sand is widely used in concrete production due to its good quality, less impurities and wide raw materials.

[0004] In the preparation process of the existing machine-made sand concrete, water reducing agent and mud blocking agent need to be added, and there are various admixtures in the water reducing agent mother liquor.

[0005] Therefore, the application provides a preparation process for improving the performance of machine-made sand concrete. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art.

[0007] The technical scheme adopted by the application to solve the technical problem is that the application provides a preparation process for improving the performance of machine-made sand concrete.

[0008] S1: according to the ratio of 160:35:20:5:780, respectively take ether type water reducing agent, ether type slump retaining type water reducing agent, retarder, mud blocking agent and water, and compound to obtain a composite admixture;

[0009] S2: take 585 parts of machine-made sand and clean it with a cleaning device, then dry the cleaned machine-made sand, then mix the treated machine-made sand with 200 parts of fine river sand, 25 parts of red mud and 1050 parts of stone, and stir for 30-50s to obtain a mixture A;

[0010] S3: 60 parts of fly ash, 60 parts of sludge and 240 parts of cement are taken and added into the mixture A, after stirring and mixing for 40-50s, mixture B is obtained;

[0011] S4: 9 parts of composite admixture and 170 parts of water are added into the mixture B, after stirring and mixing for 40-50s, the machine-made sand concrete is obtained.

[0012] Preferably, the ether type water-reducing water-reducing agent adopts transparent liquid water-reducing agent with solid content of 48.7%, pH 6.2; the ether type slump retaining water-reducing agent adopts transparent liquid water-reducing agent with solid content of 39.8%, pH 6.6; the retarder adopts sodium gluconate, which is white powder, solid content 99.8%, pH value of 10% aqueous solution is 7.45; the anti-sludge agent adopts composite class, white powder, solid content 98% of ZN1 or organic class, brown liquid, solid content 50% of ZN2; the machine-made sand adopts machine-made sand with grading partition I area, apparent density 2560kg / m 3 , fineness modulus 3.5, sludge content 1.4%; the fine river sand adopts fine river sand with grading partition II area, apparent density 2570kg / m 3 , fineness modulus 2.5, sludge content 1.6%; the red mud adopts red mud with particle size distribution of sieve bottom classification residue 96.7%, 0.15mm sieve hole classification residue 2.4%, 0.30mm sieve hole classification residue 0%, 0.60mm sieve hole classification residue 0%; the stone adopts 5~31.5mm continuous grading crushed stone, sludge content 0.6%, apparent density 2620kg / m 3 , needle-like content 8.0%, crushing value 8.2%; the fly ash adopts fly ash with specific surface area 369m 2 / kg, water requirement ratio 100%, fineness 18.6%, loss on ignition 3.3%; the sludge adopts sludge with specific surface area 410m 2 / kg, activity index 97%, fluidity ratio 97%, loss on ignition 0.5%; the cement adopts P·O42.5 cement; the water adopts tap water.

[0013] Preferably, the cleaning device in S2 comprises a cleaning tank; a cleaning cylinder is rotatably connected to the inside of the cleaning tank; a driving shaft is fixedly connected to the top of the cleaning cylinder; the rotation of the driving shaft is driven by a motor; a feeding opening is formed between the cleaning cylinder and the top of the cleaning tank; an electromagnetic valve is installed at the water outlet; in operation, when the manufactured sand needs to be cleaned, the manufactured sand is put into the inside of the cleaning cylinder through the feeding opening, water is injected into the inside of the cleaning tank through the feeding opening, after the water injection is completed, the motor is started to drive the driving shaft to rotate, so that the cleaning cylinder drives the manufactured sand in the inside of the cleaning cylinder to rotate, the soil on the surface of the manufactured sand is cleaned, the soil adhered to the surface of the manufactured sand is fully dissolved in water through the rotation of the cleaning cylinder, after the cleaning of the manufactured sand is completed, the manufactured sand is taken out, the cleaning of the manufactured sand through the rotation of the cleaning cylinder can effectively avoid the situation that the high content of soil in the manufactured sand will affect the test.

[0014] Preferably, a plurality of filter holes are uniformly formed on the side wall and the bottom of the cleaning cylinder; a water injection hole is formed between the top of the cleaning tank and the inside of the cleaning tank; a water outlet hole is formed on the side wall of the cleaning tank; an electromagnetic valve is installed in the inside of the water outlet hole; the water outlet hole is formed at a position close to the bottom of the inner cavity of the cleaning tank; in operation, after the manufactured sand is put into the inside of the cleaning cylinder, water can be injected into the inside of the cleaning tank through the water injection hole, and the manufactured sand in the inside of the cleaning cylinder is cleaned through the rotation of the cleaning cylinder, in the cleaning process, the filter holes formed on the side wall of the cleaning cylinder can filter out the manufactured sand with small particle size, so that the particle size of the manufactured sand is more uniform, and the situation that the excessive fine manufactured sand in the manufactured sand leads to the poor quality of the manufactured concrete is avoided, and the fine manufactured sand filtered out can be added to the fine river sand, so that the waste of the manufactured sand is reduced.

[0015] Preferably, a fixing shaft is fixedly connected to the inside of the cleaning tank; the fixing shaft is arranged at a position of the center of the side wall of the bottom of the cleaning cylinder; a plurality of material blocking plates are fixedly connected to the side wall of the fixing shaft; the material blocking plates are distributed in a circumferential regularity on the side wall of the fixing shaft; the material blocking plates are arranged in the inside of the cleaning cylinder; the bottom side wall of the cleaning cylinder is in contact with the fixing shaft; in operation, when the cleaning cylinder rotates, the manufactured sand in the inside of the cleaning cylinder rotates with the cleaning cylinder, and the material blocking plates block the manufactured sand in the inside of the cleaning cylinder, so that the movement of the manufactured sand in the inside of the cleaning cylinder is more disordered, the soil adhered to the manufactured sand is better dissolved in water, and the cleaning effect of the manufactured sand is better; meanwhile, the fixing shaft can limit the rotation of the cleaning cylinder, so that the rotation of the fixing shaft is more stable.

[0016] Preferably, the side wall of the blocking plate is rotatably connected with a deflector plate through a torsion spring; the inner side wall of the cleaning cylinder is fixedly connected with a plurality of pushing blocks; the pushing blocks are distributed on the inner side wall of the cleaning cylinder in a circular regular manner; in working, when the cleaning cylinder rotates, the pushing blocks push the mechanism sand in the cleaning cylinder, effectively avoiding the situation that the mechanism sand deposits at the bottom of the cleaning cylinder, causing the cleaning cylinder unable to rotate, and the pushing blocks push the deflector plate to make the deflector plate deflect, and after the deflector plate deflects, the torsion spring drives the deflector plate to rebound, causing the deflector plate to swing multiple times, and the swing of the deflector plate drives the water flow in the cleaning cylinder, so that the water can better dissolve the soil on the surface of the mechanism sand.

[0017] Preferably, the top of the cleaning cylinder is slidably connected with a sliding plate; the bottom of the sliding plate is provided with a positioning groove; the top of the cleaning cylinder is fixedly connected with a positioning block; the positioning block is rotatably connected in the positioning groove; the bottom of the blocking block is rotatably connected with a blocking block through a torsion spring; the bottom of the cleaning cylinder is slidably connected with a sliding bottom plate; the top of the sliding bottom plate is provided with an inclined groove; the position corresponding to the inclined groove of the blocking block is fixedly connected with an inclined block; the top of the sliding bottom plate and the bottom side wall of the cleaning cylinder are fixedly connected with a spring; the top of the sliding plate is connected with a fixing frame through a plurality of connecting rods; the bottom of the fixing frame is fixedly connected with a plurality of limiting rods; the limiting rods are slidably connected in the cleaning cylinder; the driving shaft adopts a telescopic rod, and the two rods of the telescopic rod are only slidable but not rotatable; the driving motor of the driving shaft is fixedly connected at the top of the fixing frame; the up-down sliding of the fixing frame is driven by an electric push rod; in working, when the mechanism sand in the cleaning cylinder needs to be taken out, the electromagnetic valve at the water outlet is first opened to discharge the water in the cleaning cylinder and the soil dissolved in the water, and then the electric push rod is started to push the sliding plate to slide downward, so that the cleaning cylinder slides downward, the inclined block at the bottom of the blocking block contacts with the inclined groove at the top of the sliding bottom plate in the process of the downward sliding of the cleaning cylinder, the blocking block deflects when the cleaning cylinder continues to slide downward, the mechanism sand in the cleaning cylinder flows out, and the sliding bottom plate moves downward after the cleaning cylinder continues to press down, so that the mechanism sand accumulated on the sliding bottom plate flows out, making the taking out of the mechanism sand more convenient.

[0018] Preferably, the bottom of the cleaning cylinder is fixedly connected with a plurality of bottom supports; in working, the bottom supports are supported to make the sliding bottom plate better separate from the bottom of the cleaning cylinder, so that the mechanism sand better flows out, and a placing groove is provided in the bottom support to fix the container for collecting the mechanism sand in the placing groove, making the collection of the mechanism sand more convenient.

[0019] Preferably, the bottom of the sliding plate is provided with a spiral groove; the top of the cleaning cylinder is fixedly connected with a spiral block; the spiral groove and the spiral block are correspondingly arranged; the inside of the positioning groove is fixedly connected with a limiting column; a spring is fixedly connected between the positioning groove and the positioning block; in working, the spiral groove pushes the spiral block during the rotation of the cleaning cylinder, so that the cleaning cylinder shakes up and down during the rotation, which can effectively avoid the situation that the filter hole is blocked by the mechanism sand in the cleaning cylinder, and after the cleaning cylinder stops rotating, the spring pushes the positioning block and the spiral groove pushes the spiral block, so that the cleaning cylinder resets and the feeding opening returns to the original position, thereby making the reuse of the equipment more convenient.

[0020] Preferably, the bottom of the cleaning tank body is fixedly connected with a curtain cloth; the curtain cloth is arranged at a position corresponding to the top inclined groove of the sliding bottom plate; in working, the curtain cloth blocks the mechanism sand during the flow of the mechanism sand, so that the mechanism sand can better fall into the container fixedly arranged in the bottom support.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The preparation process for improving the performance of mechanism sand concrete, which is characterized by the following steps: preparing a composite admixture by adopting a suitable proportion, and preparing mechanism sand concrete by adopting a suitable proportion, thereby improving the slump retention performance of the concrete without affecting the final setting time of the concrete.

[0023] 2. The preparation process for improving the performance of mechanism sand concrete, which is characterized by the following steps: rotating the driving shaft by the motor, and then rotating the cleaning cylinder to wash the mechanism sand, thereby realizing the function of more conveniently washing the mechanism sand, and effectively solving the problem that the large amount of mud in the mechanism sand easily affects the test of the mechanism sand. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is the process flow chart of the preparation process in the present application;

[0026] Figure 2 is the perspective view of the cleaning equipment in the present application;

[0027] Figure 3 is the sectional view of the cleaning tank body in the present application;

[0028] Figure 4 is the structural schematic view of the sliding plate in the present application;

[0029] Figure 5 is the sectional view of the sliding bottom plate in the present application;

[0030] Figure 6 is Figure 3 is a partial enlarged view of A in the middle;

[0031] Figure 7 is Figure 3 is a partial enlarged view of B in the middle.

[0032] In the figure: 1, cleaning tank; 101, water injection hole; 102, water outlet hole; 2, drive shaft; 3, cleaning cylinder; 301, positioning groove; 302, positioning block; 303, feeding port; 4, fixed shaft; 5, material blocking plate; 6, deflection plate; 7, push block; 8, sliding plate; 801, fixing frame; 802, limiting rod; 9, blocking block; 10, sliding bottom plate; 11, bottom support; 12, spiral groove; 13, spiral block; 14, limiting column; 15, cord fabric. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0034] Example one

[0035] As shown in the figure, the preparation process for improving the performance of machine-made sand concrete according to the embodiment of the present application has the following specific steps: Figure 1 S1: Take ether type water reducing agent, ether type slump retaining type water reducing agent, retarder, mud blocking agent and water in the proportion of 160:35:20:5:780 respectively, and compound them to obtain a composite admixture;

[0036] S2: Take 585 parts of machine-made sand and clean it using a cleaning device, then dry the cleaned machine-made sand, then mix the treated machine-made sand with 200 parts of fine river sand, 25 parts of red mud and 1050 parts of stone, and stir for 30-50s to obtain a mixture A;

[0037] S3: Take 60 parts of fly ash, 60 parts of mineral mud and 240 parts of cement, and add them to the mixture A, and stir for 40-50s to obtain a mixture B;

[0038] S4: Add 9 parts of composite admixture and 170 parts of water to the mixture B, and stir for 40-50s to obtain machine-made sand concrete.

[0039]

[0040] ​The ether type water-reducing agent is a transparent liquid water-reducing agent with a solid content of 48.7%, and a pH of 6.2; the ether type slump retaining agent is a transparent liquid water-reducing agent with a solid content of 39.8%, and a pH of 6.6; the retarder is sodium gluconate, which is a white powder with a solid content of 99.8%, and a pH of 7.45 in a 10% aqueous solution; the anti-mud agent is a composite type, a white powder with a solid content of 98% of ZN1 or an organic type, a brown liquid with a solid content of 50% of ZN2; the machine-made sand is a machine-made sand with a grading partition I area, an apparent density of 2560 kg / m 3 , a fineness modulus of 3.5, and a mud content of 1.4%; the fine river sand is a fine river sand with a grading partition II area, an apparent density of 2570 kg / m 3 , a fineness modulus of 2.5, and a mud content of 1.6%; the red mud is a red mud with a particle size distribution of a sieve bottom classification residue of 96.7%, a 0.15 mm sieve hole classification residue of 2.4%, a 0.30 mm sieve hole classification residue of 0%, and a 0.60 mm sieve hole classification residue of 0%; the stone is a continuous grading broken stone with a size of 5-31.5 mm, a mud content of 0.6%, an apparent density of 2620 kg / m 3 , a needle and flake content of 8.0%, and a crushing value of 8.2%; the fly ash is fly ash with a specific surface area of 369 m 2 / kg, a water requirement ratio of 100%, a fineness of 18.6%, and a loss on ignition of 3.3%; the mineral mud is mineral mud with a specific surface area of 410 m 2 / kg, an activity index of 97%, a flowability ratio of 97%, and a loss on ignition of 0.5%; the cement is P·O42.5 cement; and the water is tap water.

[0041] The test steps of the machine-made sand concrete are as follows:

[0042] Effect of anti-mud agent on performance of machine-made sand concrete

[0043] P1-P7 composite admixtures are obtained by compounding water-reducing agents (A1, A2), a retarder (H), an anti-mud agent (ZN), and water (W) in different proportions, and the compounding formula is shown in Table 1.

[0044]

[0045] Anti-mud performance of low strength grade machine-made sand concrete

[0046] The C 30 low strength grade machine-made sand concrete mixture ratio is adopted, and the composite admixtures compounded according to Table 1 (the anti-mud agents are ZN1 and ZN2 respectively) are added, so as to study the changes of the performance of the machine-made sand concrete. 30The mixture ratio of the machine-made sand concrete is shown in Table 6, wherein the red mud (NF), the mineral powder (K), the cement (C), the fly ash (F), the machine-made sand (S1), the fine river sand (S2), the stone (G), the composite admixture (P), and the water (W).

[0047]

[0048] The C30 machine-made sand concrete is prepared by using the mixture ratio 1 and 2 respectively, and the performance of the concrete with the addition of ZN1 anti-mud agent in the composite admixture is shown in Tables 3 and 4.

[0049]

[0050] It can be seen from Table 3 that:

[0051] (1) With the increase of the amount of ZN1 replacing A2 in the composite admixture, the initial slump of the concrete mixture is basically unchanged, the 1h slump is slightly increased, and the 2h slump is significantly increased first and then changes unobviously; the initial spread is significantly increased first and then changes unobviously, the 1h spread is gradually increased, and the slump retention performance is improved.

[0052] (2) With the increase of the amount of ZN1 replacing A2 in the composite admixture, the final setting time of the concrete mixture is shortened first and then gradually extended, the air content changes little, the 3d compressive strength has no obvious change, the 7d compressive strength is slightly improved, and the 28d compressive strength is gradually reduced, but all meet the design requirements.

[0053]

[0054] It can be seen from Table 4 that:

[0055] (1) With the increase of the amount of ZN1 replacing A2 in the composite admixture, the initial slump and spread of the concrete mixture have no obvious change, the 1h and 2h slump and spread generally show a gradually increasing trend, and the slump retention performance of the concrete can be improved when the amount of ZN1 is 20 kg / t.

[0056] (2) With the increase of the amount of ZN1 replacing A2 in the composite admixture, the final setting time of the concrete mixture is shortened first and then extended, the air content changes little, the 3d compressive strength has no obvious change, the 7d compressive strength is slightly improved, the 28d compressive strength has no obvious change when the amount of ZN1 replacing A2 is not higher than 20 kg / t, and is gradually reduced when the amount of ZN1 replacing A2 is higher than 20 kg / t, and does not meet the design requirements.

[0057]

[0058] It can be seen from Table 5 that:

[0059] (1) With the increase of the amount of ZN2 replacing A2 in the composite admixture, the initial slump of the concrete mixture is basically unchanged, the 1 h slump increases slightly, and the 2 h slump increases significantly first and then changes insignificantly; the initial spread increases significantly first and then changes insignificantly, the 1 h and 2 h spreads roughly show a gradually increasing trend, and the slump retention performance is improved.

[0060] (2) With the increase of the amount of ZN2 replacing A2 in the composite admixture, the final setting time of the concrete mixture is significantly prolonged, the air content increases, the 3 d, 7 d and 28 d compressive strengths roughly show a gradually decreasing trend, and when the amount of ZN2 replacing A2 reaches 20 kg / t, the 28 d compressive strength is lower than the design index requirement.

[0061]

[0062] It can be seen from Table 6 that:

[0063] (1) With the increase of the amount of ZN2 replacing A2 in the composite admixture, the initial slump of the concrete mixture is basically unchanged, the initial spread increases slightly, and the 1 h and 2 h slump and spread roughly show a gradually increasing trend.

[0064] (2) With the increase of the amount of ZN2 replacing A2 in the composite admixture, the final setting time of the concrete mixture is significantly prolonged, the air content increases, the 3 d, 7 d and 28 d compressive strengths gradually decrease, and when the amount of ZN2 replacing A2 reaches 10 kg / t, the 28 d compressive strength is lower than the design index requirement.

[0065] It can be seen that ZN1 can improve the slump retention performance of low-strength-grade manufactured-sand concrete and reduce the influence of silt on the slump retention performance of the water reducing agent; the air content of the low-strength-grade manufactured-sand concrete fluctuates within a small range; the setting time is prolonged with the increase of the amount of ZN1 replacing A2, but is within a controllable range; under the condition that the strength index meets the design requirement, the amount of ZN1 is not higher than 20 kg / t, within this range, ZN1 can reduce the influence of silt on the slump retention performance of low-strength-grade manufactured-sand concrete; when the amount of ZN2 is greater than 10 kg / t, ZN2 can improve the slump retention performance of low-strength-grade manufactured-sand concrete and reduce the influence of silt on the slump retention performance of the water reducing agent; with the increase of the amount of ZN2 replacing A2, the air content of the low-strength-grade manufactured-sand concrete increases, and the setting time is significantly prolonged, which is difficult to control; under the condition that the strength index meets the design requirement, the amount of ZN2 is not greater than 10 kg / t, within this range, ZN2 cannot reduce the influence of silt on the slump retention performance of low-strength-grade manufactured-sand concrete; therefore, ZN1 has a cost-effective ratio when the amount is not greater than 20 kg / t, and ZN2 is not necessary to use.

[0066] Example Two

[0067] As Figures 2-3 shown, another embodiment of the present application is: wherein S2, wherein the cleaning device comprises a cleaning tank 1; the inside of the cleaning tank 1 is rotatably connected with a cleaning cylinder 3; the top of the cleaning cylinder 3 is fixedly connected with a driving shaft 2; the rotation of the driving shaft 2 is driven by a motor; the top of the cleaning cylinder 3 and the cleaning tank 1 is provided with a feeding port 303; the water outlet hole 102 is provided with a solenoid valve; when the machine-made sand needs to be cleaned, the machine-made sand is put into the inside of the cleaning cylinder 3 through the feeding port 303, water is injected into the inside of the cleaning tank 1 through the feeding port 303, after the water injection is completed, the motor is started, the motor drives the driving shaft 2 to rotate, the cleaning cylinder 3 drives the machine-made sand in the cleaning cylinder 3 to rotate, the surface of the machine-made sand is cleaned, the surface of the machine-made sand is fully dissolved in water through the rotation of the cleaning cylinder 3, after the machine-made sand is cleaned, the machine-made sand is taken out, the machine-made sand is cleaned through the rotation of the cleaning cylinder 3, which can effectively avoid the situation that the high content of machine-made sand will affect the test.

[0068] As Figure 3 shown, the side wall and the bottom of the cleaning cylinder 3 are uniformly provided with a plurality of filter holes; the top of the cleaning tank 1 and the inside of the cleaning tank 1 are provided with a water injection hole 101; the side wall of the cleaning tank 1 is provided with a water outlet hole 102; the inside of the water outlet hole 102 is provided with a solenoid valve; the water outlet hole 102 is provided at the position close to the bottom of the cleaning tank 1; when the machine-made sand is put into the inside of the cleaning cylinder 3, water can be injected into the inside of the cleaning tank 1 through the water injection hole 101, and the machine-made sand in the cleaning cylinder 3 is cleaned through the rotation of the cleaning cylinder 3, the filter holes on the side wall of the cleaning cylinder 3 can filter out the machine-made sand with small particle size, so that the particle size of the machine-made sand is more uniform, and the situation that the excessive fine machine-made sand in the machine-made sand leads to the poor quality of the produced concrete is reduced, and the fine machine-made sand can be added to the fine river sand, reducing the waste of machine-made sand.

[0069] As Figure 3As shown, the inside of the cleaning tank 1 is fixed with a fixed shaft 4; the fixed shaft 4 is arranged at the position of the center of the bottom side wall of the cleaning cylinder 3; a plurality of material blocking plates 5 are fixed on the side wall of the fixed shaft 4; the material blocking plates 5 are distributed on the side wall of the fixed shaft 4 in a circular manner; the material blocking plates 5 are arranged in the inside of the cleaning cylinder 3; the bottom side wall of the cleaning cylinder 3 is in contact with the fixed shaft 4; during work, when the cleaning cylinder 3 rotates, the mechanism sand in the inside of the cleaning cylinder 3 rotates together with the cleaning cylinder 3, and the material blocking plates 5 block the mechanism sand in the inside of the cleaning cylinder 3, so that the movement of the mechanism sand in the inside of the cleaning cylinder 3 is more disordered, so that the soil adhered to the mechanism sand can be better dissolved in water, so that the cleaning effect of the mechanism sand is better, and the fixed shaft 4 can limit the rotation of the cleaning cylinder 3, so that the rotation of the fixed shaft 4 is more stable.

[0070] As shown in the Figure 3 , the side wall of the material blocking plate 5 is connected with a deflector plate 6 through a torsion spring; a plurality of pushing blocks 7 are fixed on the inner side wall of the cleaning cylinder 3; the pushing blocks 7 are distributed on the inner side wall of the cleaning cylinder 3 in a circular manner; during work, when the cleaning cylinder 3 rotates, the pushing blocks 7 push the mechanism sand in the inside of the cleaning cylinder 3, effectively avoiding the situation that the mechanism sand deposits at the bottom of the cleaning cylinder 3, causing the cleaning cylinder 3 unable to rotate, and the pushing blocks 7 push the deflector plate 6, so that the deflector plate 6 deflects, and after the deflector plate 6 deflects, the torsion spring drives the deflector plate 6 to rebound, so that the deflector plate 6 swings multiple times, and the swing of the deflector plate 6 drives the water in the inside of the cleaning tank 1 to flow, so that the water can better dissolve the soil on the surface of the mechanism sand.

[0071] As shown in the Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the top of the cleaning tank 1 is slidingly connected with a sliding plate 8; the bottom of the sliding plate 8 is provided with a positioning groove 301; the top of the cleaning cylinder 3 is fixedly connected with a positioning block 302; the positioning block 302 is rotationally connected in the inside of the positioning groove 301; the bottom of the blocking block 9 is rotationally connected with a blocking block 9 through a torsional spring; the bottom of the cleaning tank 1 is slidingly connected with a sliding bottom plate 10; the top of the sliding bottom plate 10 is provided with an inclined groove; the position of the blocking block 9 corresponding to the inclined groove is fixedly connected with an inclined block; the top of the sliding bottom plate 10 and the bottom side wall of the cleaning tank 1 are fixedly connected with a spring; the top of the sliding plate 8 is connected with a fixing frame 801 through a plurality of connecting rods; the bottom of the fixing frame 801 is fixedly connected with a plurality of limiting rods 802; the limiting rods 802 are slidingly connected in the inside of the cleaning tank 1; the driving shaft 2 adopts a telescopic rod, and the two rods of the telescopic rod are only slidable but not rotatable; the driving motor of the driving shaft 2 is fixedly connected at the top position of the fixing frame 801; the up-down sliding of the fixing frame 801 adopts electric push rod driving; when it is needed to take out the mechanism sand in the inside of the cleaning cylinder 3 during work, the electromagnetic valve at the water outlet hole 102 can be first opened, the water in the inside of the cleaning tank 1 and the soil dissolved in the water are discharged together, the electric push rod is started, the sliding plate 8 is pushed downward by the electric push rod, so that the cleaning cylinder 3 can slide downward, the inclined block at the bottom of the blocking block 9 contacts with the inclined groove at the top of the sliding bottom plate 10 in the process that the cleaning cylinder 3 slides downward, the blocking block 9 is deflected when the cleaning cylinder 3 continues to slide downward, so that the mechanism sand in the inside of the cleaning cylinder 3 flows out, the sliding bottom plate 10 moves downward after the cleaning cylinder 3 continues to press downward, the mechanism sand gathered on the sliding bottom plate 10 flows out after the sliding bottom plate 10 is separated from the bottom of the cleaning tank 1, so that the taking out of the mechanism sand is more convenient.

[0072] As shown in the figure, Figure 2 The bottom of the cleaning tank 1 is fixedly connected with a plurality of bottom supports 11; during work, the bottom supports 11 can be supported by being arranged at the bottom of the cleaning tank 1, so that the sliding bottom plate 10 can be better separated from the bottom of the cleaning tank 1, so that the mechanism sand can flow out better, and meanwhile, a placing groove can be arranged in the inside of the bottom support 11, so that the container for collecting the mechanism sand can be fixed in the inside of the placing groove, so that the collection of the mechanism sand is more convenient.

[0073] As shown in the figure, Figure 4As shown, the bottom of the sliding plate 8 is provided with a spiral groove 12; the top of the cleaning cylinder 3 is fixedly connected with a spiral block 13; the spiral groove 12 and the spiral block 13 are correspondingly arranged; the inside of the positioning groove 301 is fixedly connected with a limiting column 14; the spring is fixed between the positioning groove 301 and the positioning block 302; in working, in the process of rotating the cleaning cylinder 3, the spiral groove 12 pushes the spiral block 13, which makes the cleaning cylinder 3 shake up and down in the process of rotating, which can effectively avoid the situation that the mechanism sand in the cleaning cylinder 3 blocks the filter hole, and after the cleaning cylinder 3 stops rotating, the spring pushes the positioning block 302 and the spiral groove 12 pushes the spiral block 13, which can reset the cleaning cylinder 3 and make the feeding opening 303 return to the original position, so that the equipment can be used again more conveniently.

[0074] As shown in the figure, Figure 5 As shown, the bottom of the cleaning tank 1 is fixedly connected with a curtain cloth 15; the curtain cloth 15 is arranged at the position corresponding to the inclined groove on the top of the sliding bottom plate 10; in working, in the process of flowing out of the mechanism sand, the curtain cloth 15 blocks the mechanism sand, so that the mechanism sand can fall into the container fixed in the bottom support 11.

[0075] In working, when the mechanism sand needs to be cleaned, the mechanism sand can be put into the inside of the cleaning cylinder 3 through the feeding opening 303, water can be injected into the inside of the cleaning tank 1 through the feeding opening 303, after the water injection is completed, the motor is started to make the motor drive the driving shaft 2 to rotate, so that the cleaning cylinder 3 drives the mechanism sand in the inside of the cleaning cylinder 3 to rotate, which cleans the soil on the surface of the mechanism sand, and the soil adhered to the surface of the mechanism sand is fully dissolved into the water through the rotation of the cleaning cylinder 3, after the mechanism sand is cleaned, the mechanism sand is taken out, and the mechanism sand is cleaned through the rotation of the cleaning cylinder 3, which can effectively avoid the situation that the high mud content of the mechanism sand affects the test.

[0076] When the mechanism sand is put into the inside of the cleaning cylinder 3, water can be injected into the inside of the cleaning tank 1 through the water injection hole 101, and the mechanism sand in the inside of the cleaning cylinder 3 is cleaned through the rotation of the cleaning cylinder 3, in the process of cleaning, the filter hole provided on the side wall of the cleaning cylinder 3 can filter out the mechanism sand with small particle size, so that the particle size of the mechanism sand is more uniform, and the situation that the excessive fine mechanism sand in the mechanism sand leads to the poor quality of the produced concrete is avoided, and the fine mechanism sand filtered out can be added to the fine river sand, which reduces the waste of the mechanism sand.

[0077] When the cleaning cylinder 3 rotates, the mechanism sand in the cleaning cylinder 3 rotates together with the cleaning cylinder 3, and the blocking plate 5 blocks the mechanism sand in the cleaning cylinder 3, so that the movement of the mechanism sand in the cleaning cylinder 3 is more disordered, so that the mud adhered to the mechanism sand can be better dissolved in the water, and the cleaning effect of the mechanism sand is better. The fixed shaft 4 can limit the rotation of the cleaning cylinder 3, so that the rotation of the fixed shaft 4 is more stable.

[0078] When the cleaning cylinder 3 rotates, the pushing block 7 pushes the mechanism sand in the cleaning cylinder 3, effectively avoiding the situation that the mechanism sand is deposited at the bottom of the cleaning cylinder 3, causing the cleaning cylinder 3 to be unable to rotate. At the same time, the pushing block 7 pushes the deflection plate 6, so that the deflection plate 6 is deflected. After the deflection plate 6 is deflected, the torsional spring drives the deflection plate 6 to rebound, so that the deflection plate 6 swings multiple times. The swinging of the deflection plate 6 can drive the water flow in the cleaning tank 1, so that the water can better dissolve the mud on the surface of the mechanism sand.

[0079] When the mechanism sand in the cleaning cylinder 3 needs to be taken out, the electromagnetic valve at the water outlet hole 102 can be opened first to discharge the water in the cleaning tank 1 together with the mud dissolved in the water. Then the electric push rod is started to push the sliding plate 8 to slide downward, so that the cleaning cylinder 3 slides downward. During the downward sliding of the cleaning cylinder 3, the inclined block at the bottom of the blocking block 9 can be in contact with the inclined groove at the top of the sliding bottom plate 10. The cleaning cylinder 3 continues to slide downward to deflect the blocking block 9, so that the mechanism sand in the cleaning cylinder 3 flows out. After the cleaning cylinder 3 continues to press downward, the sliding bottom plate 10 can move downward. After the sliding bottom plate 10 is separated from the bottom of the cleaning tank 1, the mechanism sand accumulated on the sliding bottom plate 10 can flow out, so that the mechanism sand is taken out more conveniently.

[0080] By arranging the bottom support 11 at the bottom of the cleaning tank 1, the bottom support 11 can be lifted to better separate the sliding bottom plate 10 from the bottom of the cleaning tank 1, so that the mechanism sand flows out better. At the same time, a placing groove can be arranged in the bottom support 11 to fix the container for collecting the mechanism sand in the placing groove, so that the collection of the mechanism sand is more convenient.

[0081] During the rotation of the cleaning cylinder 3, the helical groove 12 pushes the helical block 13 to make the cleaning cylinder 3 shake up and down during rotation. The shaking can effectively avoid the situation that the mechanism sand in the cleaning cylinder 3 blocks the filter hole. After the cleaning cylinder 3 stops rotating, the spring pushes the positioning block 302 and the helical groove 12 pushes the helical block 13 to reset the cleaning cylinder 3, so that the feeding port 303 returns to the original position, thereby making the reuse of the equipment more convenient.

[0082] In the process of the manufactured sand flowing out, the curtain cloth 15 will block the manufactured sand, so that the manufactured sand can better fall into the container fixed inside the bottom support 11.

[0083] The above-mentioned front, rear, left, right, top and bottom are based on the drawings of the specification Figure 2 as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0084] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0085] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A preparation process for improving the performance of manufactured sand concrete, characterized in that, The specific steps of the preparation process are as follows: S1: Take ether-based water-reducing agent, ether-based slump-preserving water-reducing agent, retarder, mud inhibitor and water respectively in the ratio of 160:35:20:5:780, and mix them to obtain a composite admixture; S2: Take 585 parts of manufactured sand and clean it with a cleaning device. Then dry the cleaned manufactured sand. Then mix the processed manufactured sand with 200 parts of fine river sand, 25 parts of red mud and 1050 parts of stone for 30-50 seconds to obtain mixture A. S3: Take 60 parts fly ash, 60 parts sludge and 240 parts cement, add them to mixture A, stir and mix for 40-50 seconds to obtain mixture B; S4: Add 9 parts of composite admixture and 170 parts of water to mixture B, stir and mix for 40-50 seconds to obtain manufactured sand concrete; The cleaning equipment in S2 includes a cleaning tank (1); a cleaning cylinder (3) is rotatably connected inside the cleaning tank (1); a drive shaft (2) is fixed to the top of the cleaning cylinder (3); the rotation of the drive shaft (2) is driven by a motor; a feeding port (303) is provided between the top of the cleaning cylinder (3) and the cleaning tank (1); multiple filter holes are evenly provided on the side wall and bottom of the cleaning cylinder (3); a water injection hole (101) is provided between the top of the cleaning tank (1) and the inside of the cleaning tank (1); a water outlet hole (102) is provided on the side wall of the cleaning tank (1); a solenoid valve is installed inside the water outlet hole (102); the water outlet hole (102) is located near the bottom of the inner cavity of the cleaning tank (1); A solenoid valve is installed at the water outlet (102); A fixed shaft (4) is fixedly connected inside the cleaning tank (1); the fixed shaft (4) is located at the center of the bottom side wall of the cleaning cylinder (3); multiple material blocking plates (5) are fixedly connected to the side wall of the fixed shaft (4); the material blocking plates (5) are distributed in a circumferential pattern on the side wall of the fixed shaft (4); the material blocking plates (5) are located inside the cleaning cylinder (3); the bottom side wall of the cleaning cylinder (3) is in contact with the fixed shaft (4); A sliding plate (8) is slidably connected to the top of the cleaning tank (1); a positioning groove (301) is provided at the bottom of the sliding plate (8); a positioning block (302) is fixedly connected to the top of the cleaning cylinder (3); the positioning block (302) is rotatably connected to the inside of the positioning groove (301); a blocking block (9) is rotatably connected to the bottom of the positioning groove (301) via a torsion spring; a sliding bottom plate (10) is slidably connected to the bottom of the cleaning tank (1); an inclined groove is provided at the top of the sliding bottom plate (10); an inclined block is fixedly connected to the blocking block (9) at the position corresponding to the inclined groove; the sliding plate (8) is slidably connected to the top of the cleaning tank (1); a positioning groove (301) is provided at the bottom of the positioning groove (8); a positioning block (302) is rotatably connected to the bottom of the positioning groove (8); a positioning block (302) is rotatably connected to the bottom of the cleaning tank (1 ... A spring is fixed between the top of the base plate (10) and the bottom side wall of the cleaning tank (1); the top of the sliding plate (8) is connected to a fixed frame (801) by multiple connecting rods; multiple limiting rods (802) are fixed to the bottom of the fixed frame (801); the limiting rods (802) are slidably connected inside the cleaning tank (1); the drive shaft (2) is a telescopic rod, and the two rods of the telescopic rod can only slide and cannot rotate; the drive motor of the drive shaft (2) is fixed at the top position of the fixed frame (801); the up and down sliding of the fixed frame (801) is driven by an electric push rod.

2. The preparation process for improving the performance of manufactured sand concrete according to claim 1, characterized in that: The ether-based water-reducing agent is a transparent liquid water-reducing agent with a solid content of 48.7% and a pH of 6.2; the ether-based slump-retaining water-reducing agent is a transparent liquid water-reducing agent with a solid content of 39.8% and a pH of 6.6; the retarder is sodium gluconate, which is a white powder with a solid content of 99.8% and a pH of 7.45 for a 10% aqueous solution; the mud inhibitor is a composite, white powder with a solid content of 98% ZN1 or an organic, brown liquid with a solid content of 50% ZN2; the manufactured sand is graded in zone I and has an apparent density of 2560 kg / m³. 3 The manufactured sand has a fineness modulus of 3.5 and a mud content of 1.4%; the fine river sand adopts a gradation zone II design and has an apparent density of 2570 kg / m³. 3 The sand used is fine river sand with a fineness modulus of 2.5 and a mud content of 1.6%. The red clay used has the following particle size distribution: 96.7% residue on the bottom sieve, 2.4% residue on the 0.15mm sieve, 0% residue on the 0.30mm sieve, and 0% residue on the 0.60mm sieve. The stone used is 5-31.5mm continuously graded crushed stone with a mud content of 0.6% and an apparent density of 2620 kg / m³. 3 The fly ash contains 8.0% needle-like and flaky particles and has a crushing value of 8.2%. The fly ash used has a specific surface area of ​​369 m². 2 / kg, water requirement 100%, fineness 18.6%, loss on ignition 3.3% fly ash; the slurry uses a specific surface area of ​​410m² 2 / kg, with an activity index of 97%, a fluidity ratio of 97%, and a loss on ignition of 0.5% slurry; the cement used is P·O42.5 cement; the water used is tap water.

3. The preparation process for improving the performance of manufactured sand concrete according to claim 1, characterized in that: A deflector plate (6) is rotatably connected to the side wall of the material blocking plate (5) via a torsion spring; a plurality of push blocks (7) are fixedly connected to the inner side wall of the cleaning cylinder (3); the push blocks (7) are distributed in a circumferential pattern on the inner side wall of the cleaning cylinder (3).

4. The preparation process for improving the performance of manufactured sand concrete according to claim 1, characterized in that: The bottom of the cleaning tank (1) is fixed with multiple bottom supports (11).

5. The preparation process for improving the performance of manufactured sand concrete according to claim 4, characterized in that: The bottom of the sliding plate (8) is provided with a spiral groove (12); the top of the cleaning cylinder (3) is fixedly connected with a spiral block (13); the spiral groove (12) and the spiral block (13) are arranged in a corresponding manner; a limit post (14) is fixedly connected inside the positioning groove (301); a spring is fixedly connected between the positioning groove (301) and the positioning block (302).

6. The preparation process for improving the performance of manufactured sand concrete according to claim 4, characterized in that: The bottom of the cleaning tank (1) is fixed with a curtain (15); the curtain (15) is set at the position of the inclined groove at the top of the corresponding sliding base plate (10).

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