Construction method and construction system for anti-crack cement stabilized macadam base

Abstract

The invention belongs to the technical field of road base construction, and relates to an anti-crack cement stabilized macadam base construction method and system. The construction method comprises the steps that firstly, raw materials are selected, and the proportion is designed; step 2, preparing a mixed base material: uniformly mixing cement, granite macadam, basalt fiber, polycarboxylic acid, polypropylene fiber and water according to the proportion design at the temperature of 20-25 DEG C by utilizing a base material mixing device to obtain the mixed base material; step 3, laying; and 4, maintenance is conducted. According to the invention, cement, granite gravel, basalt fiber, polycarboxylic acid, polypropylene fiber and water are used as raw materials, and the raw materials are mixed at 20-25 DEG C by using a base material mixing device according to a specific ratio; further, construction is completed through paving and curing, a gravel framework is reasonable in structure, mixing is more uniform, hydration reaction is more thorough, and the stability, strength and crack resistance of a base layer are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of road base construction, and relates to a crack-resistant cement stabilized macadam base construction method and a construction system. BACKGROUND

[0002] The cement stabilized macadam base is a new type of high-strength base material, which is widely used in highway, bridge, tunnel, airport runway and other engineering, and is formed by mixing cement, fine aggregate and macadam and other materials in a certain proportion, has the bearing capacity of macadam skeleton and the reinforcing effect of cement, and has good mechanical properties.

[0003] In the construction of the existing cement stabilized macadam base, the material and particle size gradation of the macadam need to be designed to improve the strength of the base material and meet the construction requirements; however, the particle size gradation ratio design of the existing macadam is unreasonable, which results in poor accuracy and causes the skeleton structure formed by the gradation to be unreasonable, thereby affecting the bearing capacity and stability of the base; in addition, when the cement, fine aggregate and macadam and other materials are mixed, a mixing tank is usually used, but since the particle sizes of the cement, fine aggregate and macadam are not uniform, the mixing and stirring are not uniform, which directly affects the performance of the mixed material; in addition, due to different environmental conditions during construction, especially the environmental temperature which is easily affected by the region and season, too high or too low temperature will affect the hydration reaction of the cement, thereby negatively affecting the performance of the concrete, and finally resulting in poor base stability, insufficient strength and poor crack resistance. SUMMARY

[0004] In view of the technical problems that the existing cement stabilized macadam base construction has unreasonable skeleton structure, uneven mixing and stirring and affects the hydration reaction of the cement, resulting in poor base stability, insufficient strength and poor crack resistance, the application provides a crack-resistant cement stabilized macadam base construction method and a construction system.

[0005] The application uses cement, granite macadam, basalt fiber, polycarboxylic acid, polypropylene fiber and water as raw materials, mixes the raw materials at 20-25 DEG C by using a base material mixing device according to a specific ratio, and further completes the construction by paving and curing, so that the macadam skeleton structure is reasonable, the mixing is more uniform, the hydration reaction is more complete, and the base stability, strength and crack resistance are improved.

[0006] To achieve the above object, the application adopts the following technical scheme:

[0007] A crack-resistant cement stabilized macadam base construction method, comprising the following steps:

[0008] Step 1: raw material selection and ratio design

[0009] According to the requirements of fracture toughness and splitting strength, cement, granite gravel, basalt fiber, polycarboxylic acid, polypropylene fiber and water are selected as raw materials, and the mass fraction ratio is designed;

[0010] The mass fraction of each raw material is: cement 3.0%-7.0%, granite gravel 80%-90%, basalt fiber 0.3%-0.8%, polycarboxylic acid 0.1%-0.3%, polypropylene fiber 0.2%-0.7% and water 4.0%-11.5%;

[0011] The particle size D of the granite gravel is designed as: 0<D≤5mm, 5<D≤10mm and 10<D≤20mm, and the corresponding mass fractions are 20-25%, 25-35% and 25-35%, respectively;

[0012] The length of the basalt fiber is 10-20mm, and the diameter is 10-15μm;

[0013] The cement is high-strength silicate cement;

[0014] Step two: preparing mixed base material

[0015] The cement, granite gravel, basalt fiber, polycarboxylic acid, polypropylene fiber and water are mixed uniformly in the base material mixing device according to the mass fraction ratio at a temperature of 20-25℃, to obtain the mixed base material;

[0016] Step three: paving

[0017] The mixed base material is paved on the road base by using a paver, a static pressure roller and a vibrating roller, to obtain the gravel base;

[0018] Step four: maintenance

[0019] The gravel base is maintained until the gravel base is completely dry, and the construction of the toughened and anti-cracking cement stabilized gravel base is completed.

[0020] Further limited, the specific process of step two for preparing the mixed base material is:

[0021] The granite gravel with particle sizes of 0-5mm, 5-10mm and 10-20mm is screened out by using the screening mechanism in the mixed material device; at the same time, the granite gravel with different particle sizes is ensured to fall into the aggregate tank of the base material mixing device according to the mass fractions of 20%, 30% and 17%;

[0022] According to the feeding sequence of cement, basalt fiber and polypropylene fiber, polycarboxylic acid and water, each raw material is added to the aggregate box of the mixed material device according to the designed mass fraction; the mixed mechanism arranged in the aggregate box is used to mix the added raw materials uniformly in sequence; at the same time, the temperature control mechanism on the aggregate box is used to ensure that the temperature in the aggregate box is maintained at 20-25℃, and the mixed base material is obtained after mixing by the mixing mechanism.

[0023] Further limitation, the mixing mechanism adopts a rotation mode of forward and reverse revolution plus rotation to mix the raw materials; the temperature control mechanism adopts a heat exchange mode to ensure that the temperature in the aggregate box is maintained at 20-25℃.

[0024] Further limitation, the specific process of step three is:

[0025] The mixed base material in the aggregate box is transported to the paver;

[0026] The mixed mixed base material is spread on the road base using the paver again;

[0027] Then use the static pressure roller to carry out preliminary compaction;

[0028] Then use the vibrating roller to carry out supplementary compaction;

[0029] Finally, use the nuclear density instrument to check the compactness of the road base to ensure that the design requirements are met, and get the gravel base.

[0030] Further limitation, the specific process of step four is:

[0031] First, cover the isolation and moisture retention material on the gravel base; then maintain the gravel base by watering, the maintenance time is not less than 7 days, until the gravel base is completely dry, complete the construction of the toughened and anti-cracking cement stabilized gravel base.

[0032] A construction system for implementing the anti-cracking cement stabilized gravel base construction method, the construction system comprises:

[0033] The base material mixing device is used for preparing the mixed base material with cement, granite gravel, basalt fiber, polycarboxylic acid, polypropylene fiber and water as raw materials, and conveying to the paver;

[0034] The paver is used for spreading the mixed base material on the road base;

[0035] The static pressure roller is used for preliminary compaction of the spreaded mixed base material;

[0036] The vibrating roller is used for supplementary compaction of the preliminary compacted mixed base material to get the gravel base;

[0037] Nuclear density gauge: used to detect the compactness of the gravel base;

[0038] Sprinkling device: used for maintenance of the gravel base.

[0039] Further limited, the base material mixing device includes aggregate tank, screening mechanism, mixing mechanism and temperature control mechanism;

[0040] The aggregate tank is used to accommodate the added raw materials; the bottom of the aggregate tank is connected with a conveying pipe, which is used to convey the mixed base material to the paver;

[0041] The screening mechanism is located above the aggregate tank and is rotatably connected with the aggregate tank, which is used to screen the granite gravel and add the granite gravel meeting the grading requirements into the aggregate tank;

[0042] The mixing mechanism is located inside the aggregate tank, which is used to mix the raw materials by adopting the rotation mode of forward and reverse revolution plus rotation;

[0043] The temperature control mechanism is located inside the aggregate tank, which is used to ensure that the temperature in the aggregate tank is maintained at 20-25℃ by heat exchange.

[0044] Further limited, a sealing cover is arranged on the aggregate tank; an inlet pipe and a conveying frame are arranged on the upper surface of the sealing cover respectively; the inlet pipe is used to add cement, basalt fiber, polycarboxylic acid, polypropylene fiber and water into the aggregate tank; the conveying frame is used to add the granite gravel screened by the screening mechanism into the aggregate tank; a weight sensor is arranged at the bottom of the conveying frame, which is used to monitor the adding quality of granite gravel of different particle sizes;

[0045] The screening mechanism includes a screening motor, a rotating rod, a screen and a cam; a support rod is arranged on the upper surface of the sealing cover; the screen is located above the conveying frame and is movably connected with the support rod, and the screen is telescopic up and down along the axial direction of the support rod; the rotating rod is located below the screen and is rotatably connected with the outer side wall of the support rod; the cam is sleeved on the rotating rod and is in contact with the bottom surface of the screen; the screening motor is located on the sealing cover and drives the rotating rod to rotate.

[0046] Further limited, the mixing mechanism includes a mixing motor, a mixing rod and a limiting frame, all of which are located in the aggregate tank;

[0047] The hybrid motor is fixedly installed on the lower surface of the sealing cover, a plurality of rotating frames are arranged on the outer surface of the hybrid rod along the axial direction of the hybrid rod, the plurality of rotating frames are all in rotational connection with the hybrid rod, a plurality of mixing plates are arranged on the outer wall of each rotating frame, the plurality of mixing plates are uniformly distributed in a circle in the circumferential direction of the hybrid rod, a fixed frame is movably connected between two adjacent rotating frames, and the fixed frame is sleeved on the outer surface of the hybrid rod; and the hybrid rod is arranged along the vertical direction and is in rotational connection with the hybrid motor located above.

[0048] The inner wall of the fixed frame is in rotational connection with a rotating rod, the two end surfaces of the rotating rod are fixedly installed with circular plates with tooth columns, the outer surface of the hybrid rod is fixedly installed with a rotating plate with a tooth column, the tooth column of the circular plate at one end of the rotating rod is in meshing connection with the tooth column of the rotating plate, and the tooth column of the circular plate at the other end is in meshing connection with the tooth column arranged on the inner wall of the rotating frame.

[0049] The limiting frame is located in the rotating frame and is in bearing rotational connection with the outer surface of the hybrid rod, the outer surface of the limiting frame is provided with a limiting groove, and a limiting frame is slidably connected to the limiting groove; and the limiting frame is connected with the mixing plate.

[0050] Further limitation, the temperature control mechanism includes a heat preservation layer, a temperature control pipe and a temperature sensor; the heat preservation layer is fixedly installed on the inner wall of the aggregate tank, the temperature control pipe is in a serpentine structure and is arranged along the inner wall of the aggregate tank, the two ends of the temperature control pipe are extended to the outside of the aggregate tank and are respectively in communication with the circulating liquid tank body, and the circulating liquid in the temperature control pipe regulates the temperature in the aggregate tank through heat exchange; and the temperature sensor is arranged on the inner wall of the aggregate tank.

[0051] Compared with the prior art, the present application has the following advantages:

[0052] 1、The cement, granite gravel, basalt fiber, polycarboxylic acid, polypropylene fiber and water are used as raw materials, and the raw materials are mixed at 20-25 DEG C by using the base material mixing device according to a specific ratio; further, the construction is completed through paving and curing, the gravel skeleton structure is reasonable, the mixing is more uniform, the hydration reaction is more complete, and the base stability, strength and crack resistance are improved.

[0053] 2、The screening mechanism in the mixing material device is used for accurately screening granite gravel with different particle sizes, and the mass fraction is strictly monitored, so that the particle size accuracy of the granite gravel is higher, and the rationality of the skeleton structure is enhanced; the mixing mechanism in the mixing material device adopts a rotation mode of forward and reverse revolution plus rotation to mix the raw materials, the mixing uniformity of the raw materials is enhanced, and then the strength and crack resistance of the cement stabilized gravel base are improved.

[0054] 3、The construction system provided by the application comprises a base material mixing device, a paver, a static pressure road roller, a vibrating road roller, a nuclear density gauge and a watering device; precise screening, uniform mixing, paving and maintenance of raw materials are fully realized, the road base is ensured to have the effects of toughening and crack resistance, and the performance requirements of the road base are met.

[0055] 4、The base material mixing device provided by the application comprises an aggregate tank, a screening mechanism, a mixing mechanism and a temperature control mechanism; the aggregate tank, the screening mechanism, the mixing mechanism and the temperature control mechanism are integrated, the effects of the gravel skeleton structure, the mixing uniformity and the cement hydration reaction are improved, the structure is simple, the operation is simple, and the construction is convenient.

[0056] 5、In the application, the screening mechanism comprises a screening motor, a rotating rod, a screen and a cam; a supporting rod is arranged on the upper surface of the sealing cover; the screen is located above the conveying frame and is movably connected with the supporting rod, and the screen is telescopic up and down along the axial direction of the supporting rod; the rotating rod is located below the screen and is rotatably connected with the outer side wall of the supporting rod; the cam is sleeved on the rotating rod and is in contact with the bottom surface of the screen; and the screening motor is located on the sealing cover and drives the rotating rod to rotate. Through the structural design among the cam, the rotating rod and the screen, when the triangular tip of the cam contacts the screen, the screen and the slide rod are driven to rise, and the spring provides a reset force after the screen and the slide rod rise, thereby solving the problem that the diameter of the gravel cannot be accurately screened in the existing construction, ensuring that the proportion of the granite gravel meets the design requirements, improving the skeleton structure, and improving the bearing capacity and stability of the base.

[0057] 6、In the application, the mixing mechanism comprises a mixing motor, a mixing rod and a limiting frame, all of which are located in the aggregate tank; further through the arrangement of the rotating frame, the fixed frame, the rotating plate, the rotating rod, the circular plate, the mixing plate and the limiting frame and other components, each component is designed through a special structure, so that the two rotating frames located above and below the fixed frame are positively and negatively revolved, thereby driving the mixing plate on the rotating frame to positively and negatively revolve, the limiting frame drives the mixing plate to synchronously rotate, the raw materials in the aggregate tank are more uniformly mixed, the performance of the mixed base material is improved, and the strength and crack resistance of the base are improved.

[0058] 7、In the application, the temperature control mechanism comprises a heat preservation layer, a temperature control pipe and a temperature sensor; the temperature in the aggregate tank is adjusted by circulating liquid flowing into the temperature control pipe, and the temperature inside the aggregate tank is monitored by the temperature sensor, so that the temperature in the aggregate tank is kept at 20-25 DEG C, the hydration reaction is not affected, the hydration effect of the cement is improved, and the strength and stability of the base are improved; and the temperature control mechanism has a simple structure. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 The application provides a construction device overall structure schematic view;

[0060] Figure 2 The temperature control pipe schematic diagram of the construction device provided by the application;

[0061] Figure 3 The screen mesh perspective view of the construction device provided by the application;

[0062] Figure 4 The conveying frame perspective view of the construction device provided by the application;

[0063] Figure 5 The rotating rod perspective view of the construction device provided by the application;

[0064] Figure 6 The weight sensor perspective view of the construction device provided by the application;

[0065] Figure 7 The mixing motor perspective view of the construction device provided by the application;

[0066] Figure 8 The mixing rod perspective view of the construction device provided by the application;

[0067] Figure 9 The rotating frame perspective view of the construction device provided by the application;

[0068] Figure 10 The limiting frame perspective view of the construction device provided by the application;

[0069] Figure 11 The limiting groove perspective view of the construction device provided by the application;

[0070] Figure 12 The rotating rod perspective view of the construction device provided by the application;

[0071] Figure 13 The temperature sensor perspective view of the construction device provided by the application;

[0072] Wherein:

[0073] 1-collecting box; 2-sealing cover; 21-sliding rod; 22-screen mesh; 23-spring; 3-rotating rod; 31-screening motor; 4-cam; 41-conveying frame; 42-weight sensor; 43-feeding pipe; 5-mixing motor; 51-mixing rod; 52-rotating frame; 53-fixed frame; 6-limiting frame; 61-limiting groove; 62-limiting frame; 63-mixing plate; 7-rotating rod; 71-round plate; 72-rotating plate; 8-thermal insulation layer; 81-conveying pipe; 9-protection frame; 91-temperature sensor; 92-temperature control pipe. DETAILED DESCRIPTION

[0074] The application will be described in further detail below with reference to the drawings and embodiments, but the embodiments of the application are not limited thereto. Other methods for preparing the compounds of the application are considered to be within the scope of the application, with some routine modifications of the reaction conditions according to the application.

[0075] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0076] Techniques, methods, and equipment known to those of ordinary skill are not necessarily discussed in detail because such techniques, methods, and equipment are considered to be part of the state of the art.

[0077] It should also be understood that the above-described specific embodiments are only used to explain the application, and the protection scope of the application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the application within the technical scope disclosed by the application.

[0078] Embodiment 1

[0079] The embodiment provides a construction method of anti-cracking cement stabilized macadam base, comprising the following steps:

[0080] Step one: raw material selection and proportioning design

[0081] According to the requirements of fracture toughness and splitting strength, cement, granite macadam, basalt fiber, polycarboxylic acid, polypropylene fiber and water are selected as raw materials, and the mass fraction is designed.

[0082] Fracture toughness refers to the ability of a material to resist crack instability expansion. The higher the value, the less likely the crack is to expand under stress, as determined by a fracture toughness test (such as a three-point bending beam test).

[0083] Splitting strength (tensile strength) includes crack resistance stress coefficient and crack resistance strain coefficient: a comprehensive evaluation index based on shrinkage strain and material modulus. The higher the value, the better the crack resistance.

[0084] In this embodiment, the mass fraction of each raw material is: cement 5.0%, granite macadam 89%, basalt fiber 0.8%, polycarboxylic acid 0.2%, polypropylene fiber 0.7%, and water 4.3%.

[0085] The gradation design of the particle size D of the granite macadam is: 0 < D ≤ 5 mm, 5 < D ≤ 10 mm, and 10 < D ≤ 20 mm, and the mass fraction ratio is 22%, 32%, and 35%.

[0086] Preferably, the basalt fiber has a length of 10-20 mm and a diameter of 10-15 μm.

[0087] Preferably, the cement is high-strength Portland cement.

[0088] The high-strength Portland cement with a mark higher than 42.5 is selected as the main cementitious material, the granite crushed stone is selected to provide skeleton support, the polycarboxylic acid superplasticizer is selected to improve fluidity, the basalt fiber is selected to enhance toughness and crack resistance, and the polypropylene fiber is selected to further enhance crack resistance; water participates in the cement hydration reaction; thereby improving the toughness and crack resistance of the cement stabilized crushed stone base.

[0089] Step two: preparing the mixed base material

[0090] The cement, granite crushed stone, basalt fiber, polycarboxylic acid, polypropylene fiber and water are mixed uniformly at a temperature of 20-25 °C according to the mass fraction ratio design by using the base material mixing device, to obtain the mixed base material.

[0091] The specific process of step two of preparing the mixed base material is:

[0092] The granite crushed stone with particle sizes of 0-5 mm, 5-10 mm and 10-20 mm is screened out by using the screening mechanism in the mixed material device; at the same time, the granite crushed stone with different particle sizes is ensured to fall into the aggregate tank 1 of the base material mixing device according to the mass fraction of 20%, 30% and 17%;

[0093] According to the feeding sequence of the cement, basalt fiber, polypropylene fiber, polycarboxylic acid and water, each raw material is added to the aggregate tank 1 of the mixed material device according to the designed mass fraction; the mixed mechanism arranged in the aggregate tank 1 is used to mix the added raw materials uniformly in sequence; at the same time, the temperature control mechanism on the aggregate tank 1 is used to ensure that the temperature in the aggregate tank 1 is maintained at 20-25 °C, and the mixed base material is obtained after mixing by the mixing mechanism.

[0094] The mixing mechanism adopts a rotation mode of forward and reverse revolution plus rotation to mix the raw materials; the temperature control mechanism adopts a heat exchange mode to ensure that the temperature in the aggregate tank 1 is maintained at 20-25 °C.

[0095] Step three: paving

[0096] The mixed base material is paved on the road base by using a paver, a static pressure road roller and a vibrating road roller to obtain the crushed stone base.

[0097] The specific process of step three is:

[0098] The mixed base material in the aggregate tank 1 is transported to the paver;

[0099] The mixed base material is spread on the road base by using a paver; during the spreading process, the material is ensured to be evenly distributed to avoid local accumulation or deficiency;

[0100] Subsequently, the material is initially compacted by using a static pressure roller;

[0101] Then, the material is supplemented compacted by using a vibrating roller;

[0102] Finally, the density of the road base is checked by using a nuclear density gauge to ensure that the design requirements are met, and the gravel base is obtained.

[0103] In this embodiment, the thickness of the spread layer is 18-20 cm to avoid uneven distribution of fibers or insufficient compaction due to excessive thickness. The spreading speed is 1.5-2.5 m / min in the standard range, and 2 m / min is preferred to ensure sufficient compaction. Since the added fibers increase the internal friction of the mixture, the loose spreading coefficient is generally 1.28-1.35; accordingly, when the compacted thickness is 20 cm, the loose spreading thickness is 25.6-27.0 cm. The design requirements for the compaction degree are: the standard value is ≥98%, and the minimum limit is ≥94%.

[0104] In this embodiment, if the density is insufficient, the vibrating roller is used for supplementary compaction until the density meets the density requirements of the road base.

[0105] Step four: maintenance

[0106] The gravel base is maintained until the gravel base is completely dry, and the construction of the toughened and anti-cracking cement stabilized gravel base is completed.

[0107] The specific process of step four is:

[0108] First, the isolation and moisture retention material is covered on the gravel base; then the gravel base is maintained by watering, and the maintenance time is not less than 7 days until the gravel base is completely dry, and the construction of the toughened and anti-cracking cement stabilized gravel base is completed.

[0109] Specifically, first, the geotextile, straw mat and other materials (isolation and moisture retention material) are evenly covered on the compacted gravel base to maintain the moisture of the gravel base surface; in the later period, the gravel base is maintained by watering regularly to keep the gravel base surface moist, and the watering frequency and amount should be adjusted according to the environmental temperature and humidity, the maintenance time is not less than 7 days, and the specific time is determined according to the environmental conditions, cement type and experimental results; after the maintenance is completed, the watering frequency is gradually reduced until the gravel base is completely dry, and the construction of the toughened and anti-cracking cement stabilized gravel base is completed.

[0110] In this embodiment, the performance of the formed cement stabilized gravel base is tested, and a control example without adding fibers is set. Through the test, it is found that the toughened and anti-cracking performance indicators are as follows:

[0111] The fracture toughness is 0.8 MPa.m 0 5 The fracture toughness is 0.8 MPa.m

[0112] It can be seen that, in the embodiment, cement, granite crushed stone, basalt fiber, polycarboxylic acid, polypropylene fiber and water are used as raw materials, and the particle size of the granite crushed stone is accurately screened by using the base material mixing device according to a specific ratio. Meanwhile, the raw materials are mixed by using the mixing mechanism of the base material mixing device in a rotation mode of forward and reverse revolution plus rotation. Meanwhile, the temperature of the mixture is ensured to be kept at 20-25 DEG C, so that the hydration reaction of the cement can be smoothly carried out. Then, the obtained mixed base material is paved and maintained. By using the construction method of the embodiment, the skeleton structure is reasonable, the mixture is more uniform, and the strength of the cement stabilized crushed stone base is improved, so that the bearing capacity and stability of the road base are improved, and the purpose of toughness and crack resistance is achieved.

[0113] Embodiment 2

[0114] The embodiment provides a construction method of a crack-resistant cement stabilized crushed stone base, and the raw material selection and mass fraction ratio design in step one are as follows: cement 7.0%, granite crushed stone 80%, basalt fiber 0.5%, polycarboxylic acid 0.3%, polypropylene fiber 0.7% and water 11.5%.

[0115] The mass fraction of each raw material is: cement 7.0%, granite crushed stone 80%, basalt fiber 0.5%, polycarboxylic acid 0.3%, polypropylene fiber 0.7% and water 11.5%.

[0116] The particle size D of the granite crushed stone is designed as follows: 0 < D ≤ 5 mm, 5 < D ≤ 10 mm and 10 < D ≤ 20 mm, and the corresponding mass fractions are 20%, 30% and 30%, respectively.

[0117] Embodiment 3

[0118] The embodiment provides a construction method of a crack-resistant cement stabilized crushed stone base, and the raw material selection and mass fraction ratio design in step one are as follows: cement 3.0%, granite crushed stone 90%, basalt fiber 0.3%, polycarboxylic acid 0.3%, polypropylene fiber 0.2% and water 6.2%.

[0119] The mass fraction of each raw material is: cement 3.0%, granite crushed stone 90%, basalt fiber 0.3%, polycarboxylic acid 0.3%, polypropylene fiber 0.2% and water 6.2%.

[0120] ​The particle size D of the granite macadam is graded as: 0 < D < 5 mm, 5 < D < 10 mm and 10 < D < 20 mm, and the corresponding mass fractions are 25%, 30% and 35% respectively.

[0121] Embodiment 4

[0122] The embodiment provides a construction system of fiber toughened and anti-cracking cement stabilized macadam base, comprising:

[0123] A base material mixing device is used for preparing mixed base material by using cement, granite macadam, basalt fiber, polycarboxylic acid, polypropylene fiber and water as raw materials, and conveying the mixed base material to a paver;

[0124] The paver is used for paving the mixed base material on a road base;

[0125] A static pressure roller is used for preliminarily compacting the paved mixed base material;

[0126] A vibrating roller is used for supplementally compacting the preliminarily compacted mixed base material to obtain a macadam base;

[0127] A nuclear density gauge is used for detecting the compactness of the macadam base;

[0128] A watering device is used for maintaining the macadam base.

[0129] Referring to Figure 1 In the embodiment, the base material mixing device comprises a material collecting box 1, a screening mechanism, a mixing mechanism and a temperature control mechanism.

[0130] The material collecting box 1 is used for accommodating the added raw materials; the bottom of the material collecting box 1 is connected with a conveying pipe 81, and the conveying pipe 81 is used for conveying the mixed base material to the paver;

[0131] The screening mechanism is located above the material collecting box 1 and is rotationally connected with the material collecting box 1, and is used for screening the granite macadam and adding the granite macadam meeting the grading requirements into the material collecting box 1;

[0132] The mixing mechanism is located in the material collecting box 1, and is used for mixing the raw materials by adopting a rotation mode of forward and reverse revolution plus rotation;

[0133] The temperature control mechanism is located in the material collecting box 1, and is used for ensuring that the temperature in the material collecting box 1 is kept at 20-25 DEG C by adopting heat exchange.

[0134] Referring to Figure 1 , Figure 4 , Figure 5 and Figure 6In the embodiment, the sealing cover 2 is arranged on the aggregate tank 1; the feeding pipe 43 and the conveying frame 41 are arranged on the upper surface of the sealing cover 2 respectively; the feeding pipe 43 is used for adding cement, basalt fiber, polycarboxylic acid, polypropylene fiber and water into the aggregate tank 1; the conveying frame 41 is used for adding the granite gravel screened by the screening mechanism into the aggregate tank 1; the bottom of the conveying frame 41 is provided with the weight sensor 42, and the weight sensor 42 is used for monitoring the adding quality of granite gravel with different particle sizes.

[0135] Referring to Figure 2 and Figure 3 In the embodiment, the screening mechanism includes the screening motor 31, the rotating rod 3, the screen 22 and the cam 4; the supporting rod is arranged on the upper surface of the sealing cover 2; the screen 22 is located above the conveying frame 41 and movably connected with the supporting rod, and the screen 22 is telescopic along the axial direction of the supporting rod; the rotating rod 3 is located below the screen 22 and rotatably connected with the outer side wall of the supporting rod; the cam 4 is sleeved on the rotating rod 3 and in contact with the bottom surface of the screen 22; the screening motor 31 is located on the sealing cover 2 and drives the rotating rod 3 to rotate.

[0136] Referring to Figure 4 and Figure 5 In order to ensure the continuity and efficiency of the screening process, the sealing cover 2 is fixedly installed on the upper surface of the aggregate tank 1 by bolts, and a supporting rod is arranged at each corner of the upper surface of the sealing cover 2; a groove is arranged in each supporting rod, and a sliding rod 21 is slidingly inserted into the groove; the screen 22 is connected with and fixed to the upper surface of the sliding rod 21 by bolts; a spring 23 is fixedly installed on the lower surface of the sliding rod 21, and the sliding rod 21 is fixedly installed with the bottom wall in the groove through the spring 23; the sealing cover 2 and the aggregate tank 1 are fixedly installed by bolts, which is convenient for disassembly; the sealing cover 2 and the sliding rod 21 are slidingly inserted, which is fixed and does not affect the lifting; the four corners of the screen 22 are fixedly installed with the four sliding rods 21 by bolts, which is convenient for replacing the screen 22 with different diameters of screen holes to screen the granite gravel with the required diameter; the spring 23 is fixedly installed with the sliding rod 21 and the groove of the supporting rod of the sealing cover 2, and the spring 23 can reset after the sliding rod 21 rises, so as to ensure the continuity and efficiency of the screening process.

[0137] Specifically, in order to ensure efficient transmission of power, the outer side wall of the supporting rod on the sealing cover 2 is rotatably connected with the rotating rod 3 through a bearing; the rotating rod 3 is two, and the two rotating rods 3 are connected through a transmission wheel to realize synchronous rotation; the screening motor 31 is fixedly installed on the upper surface of the sealing cover 2, and the output shaft of the screening motor 31 drives one of the rotating rods 3 to rotate through a bevel gear set, and simultaneously drives the other rotating rod 3 to rotate synchronously. The sealing cover 2 and the rotating rod 3 are rotatably connected through a bearing, which is fixed and does not affect the rotation; the sealing cover 2 and the screening motor 31 are fixedly installed, which is fixed; the screening motor 31 drives the two rotating rods 3 to rotate synchronously, so as to ensure efficient transmission of power.

[0138] In this embodiment, the working principle of the screening mechanism is as follows: When it is necessary to screen the particle size of granite crushed stone, the operator fixes the screen 22 with a screen hole diameter of 5mm to the slide rod 21 with bolts, pours the granite crushed stone into the screen 22, starts the screening motor 31 to drive the rotating rod 3 to rotate, thereby driving the cam 4 on the rotating rod 3 to rotate. When the triangular tip of the cam 4 contacts the screen 22, it generates an upward thrust, driving the screen 22 and the slide rod 21 to rise. The spring 23 provides compression after the screen 22 and the slide rod 21 rise. The force returns screen 22 to its initial position, ensuring continuous screening. The vibration frequency and amplitude of screen 22 can be adjusted by the rotation speed of the rotating rod 3. After screening, granite gravel with a diameter of 0-5mm enters the lower conveyor frame 41. Simultaneously, the weight sensor 42 located below the conveyor frame 41 detects that the mass fraction of granite gravel of this diameter is 20%. The valve on the conveyor frame 41 opens, allowing granite gravel with a diameter of 0-5mm and a mass fraction of 20% to enter the collection box 1. The unscreened gravel from the previous screen 22 is then removed. The granite crushed stone is screened by manual vibration to remove excess granite crushed stone with a diameter of 0-5mm, so that granite crushed stone with a diameter larger than 5mm is trapped on the previous screen 22. The screening motor 31 is then turned off. The screen 22 with a screen hole diameter of 10mm is manually replaced, and the granite crushed stone in the previous screen 22 (screen hole diameter of 5mm) is poured into the new screen 22 (screen hole diameter of 10mm). The above steps are repeated to screen out granite crushed stone with a diameter of 5-10mm until the weight sensor 42 detects the crushed stone. When the mass fraction of granite crushed stone of this diameter is measured to be 30%, the valve on the conveying frame 41 is opened, allowing granite crushed stone with a diameter of 5-10 mm and a mass fraction of 30% to enter the collection box 1. Finally, a screen 22 with a screen hole diameter of 20 mm is replaced, and the above steps are repeated to screen out granite crushed stone with a diameter of 10-20 mm and a mass fraction of 17% to enter the collection box 1. Then, other raw materials (cement, basalt fiber, polycarboxylate, polypropylene fiber and water) are conveyed into the collection box 1 through the feed pipe 43.

[0139] See Figure 7 and Figure 11 In this embodiment, the mixing mechanism includes a mixing motor 5, a mixing rod 51, and a limiting frame 6, all located in the collection box 1.

[0140] See Figure 8 and Figure 9In the embodiment, the hybrid motor 5 is fixedly installed on the lower surface of the sealing cover 2; a plurality of rotating frames 52 are arranged on the outer portion of the hybrid rod 51 in the axial direction of the hybrid rod 51, the plurality of rotating frames 52 are all rotationally connected with the hybrid rod 51, and a plurality of mixing plates 63 are arranged on the outer wall of each rotating frame 52, and the plurality of mixing plates 63 are evenly distributed in a circle in the circumferential direction of the hybrid rod 51; one fixed frame 53 is movably connected between two adjacent rotating frames 52, and the fixed frame 53 is sleeved on the outer portion of the hybrid rod 51; the hybrid rod 51 is arranged in the vertical direction and rotationally connected with the hybrid motor 5 located above.

[0141] Referring to Figure 10 , Figure 11 and Figure 12 In the embodiment, the inner wall of the fixed frame 53 is rotationally connected with a rotating rod 7, and the two end surfaces of the rotating rod 7 are fixedly installed with circular plates 71 with tooth columns; the outer surface of the hybrid rod 51 is fixedly installed with a rotating plate 72 with a tooth column; the tooth column of the circular plate 71 at one end of the rotating rod 7 is engaged with the tooth column of the rotating plate 72, and the tooth column of the circular plate 71 at the other end is engaged with the tooth column arranged on the inner wall of the rotating frame 52.

[0142] Referring to Figure 11 In the embodiment, the limiting frame 6 is located in the rotating frame 52 and rotationally connected with the outer surface of the hybrid rod 51 through a bearing, the outer surface of the limiting frame 6 is provided with a limiting groove 61, the limiting groove 61 is slidably connected with a limiting frame 62, and the limiting frame 62 is connected with the mixing plate 63.

[0143] Specifically, taking one of the fixed frames 53 and two rotating frames 52 rotationally connected above and below the fixed frame 53 as an example, the rotation mode of the hybrid mechanism is described.

[0144] The two rotating frames 52 are respectively rotatably connected to the fixed frame 53 above and below, and the rotation of the mixing plate 63 is realized through the two rotating frames 52. Preferably, the outer surface of the mixing rod 51 is rotatably connected to a rotating frame 52 with a toothed column through a bearing, the lower surface of the rotating frame 52 is rotatably connected to the fixed frame 53, and the lower surface of the fixed frame 53 is rotatably connected to the upper surface of the other rotating frame 52; the mixing motor 5 drives the rotation of the mixing rod 51, at this time the mixing rod 51 drives the rotation of the rotating frame 52 connected thereto, since the rotating frame 52 is rotatably connected to the fixed frame 53, and the fixed frame 53 is rotatably connected to the other rotating frame 52, the rotation of the rotating frame 52 does not affect the fixed frame 53, so that the fixed frame 53 realizes the forward and reverse revolution of the two rotating frames 52 rotatably connected above and below. Further, in order to drive the mixing plate 63 on the rotating frame 52 to rotate forward and backward, the inner wall of the fixed frame 53 is rotatably connected to a rotating rod 7 through a bearing, the surfaces of both ends of the rotating rod 7 are fixedly installed with a circular plate 71 with a toothed column, the outer surface of the mixing rod 51 is fixedly installed with a rotating plate 72 with a toothed column, the toothed column of the rotating plate 72 is engaged with the toothed column of the circular plate 71 at one end of the rotating rod 7, and the toothed column of the rotating frame 52 is engaged with the toothed column of the circular plate 71 at the other end of the rotating rod 7; the fixed frame 53 is rotatably connected to the rotating rod 7 through a bearing, which can ensure the stability of the rotation of the rotating rod 7, and the two ends of the rotating rod 7 are fixedly installed with the circular plate 71 with a driving toothed column; the mixing rod 51 is fixedly installed with the rotating plate 72 with a toothed column, which drives synchronous rotation, the toothed column of the rotating plate 72 is engaged with the toothed column of the circular plate 71, which drives the rotation of the circular plate 71, and the toothed column of the circular plate 71 is engaged with the toothed column of the rotating frame 52 above and the toothed column of the rotating frame 52 below, so that the two rotating frames 52 above and below rotate forward and backward, in order to drive the mixing plate 63 on the rotating frame 52 to rotate forward and backward. At the same time, since the outer surface of the mixing rod 51 is rotatably connected to the limiting frame 6 through a bearing, and the limiting frame 6 is located in the rotating frame 52 rotatably connected to the mixing rod 51, the outer surface of the limiting frame 6 is provided with a limiting slot 61, the inner wall of the limiting slot 61 is slidably connected to a limiting frame 62, the front end surface of the limiting frame 62 is fixedly installed with one end of the mixing plate 63, and the mixing plate 63 is rotatably connected to the groove provided on the rotating frame 52, the mixing rod 51 is rotatably connected to the limiting frame 6 through a bearing, which is fixed at the same time, and the rotation of the mixing rod 51 does not affect the limiting frame 6, since the design of the limiting slot 61, the limiting frame 62 moves on the limiting slot 61, which rotates, the limiting frame 62 is fixedly installed with the mixing plate 63, which is fixed, the mixing plate 63 is rotatably connected to the rotating frame 52 through a bearing, which rotates synchronously, which is fixed at the same time without affecting the rotation, in order to ensure the stability of the rotation of the mixing plate 63.

[0145] In this embodiment, the working principle of the mixing mechanism for mixing the raw materials is: through the feeding pipe 43, 18% high-strength silicate cement by weight is added into the aggregate tank 1, the mixing motor 5 is started to drive the mixing rod 51 to rotate, the mixing rod 51 drives the rotating plate 72 fixedly installed thereon to rotate, the tooth column on the rotating plate 72 is engaged with the tooth column of the circular plate 71 at one end of the rotating rod 7, the rotating rod 7 is driven to rotate through the circular plate 71, the tooth column on the circular plate 71 at the other end of the rotating rod 7 is engaged with the tooth columns on the rotating frames 52 located above and below the rotating rod 7, so that the two rotating frames 52 are positively and negatively revolved on the fixed frame 53 to which they are rotationally connected, and the mixing plate 63 to which they are rotationally connected is positively and negatively revolved; while the mixing plate 63 is positively and negatively revolved, the limiting frame 62 connected with the mixing plate 63 is slidingly connected with the limiting groove 61 opened on the limiting frame 6, due to the shape design of the limiting groove 61, the limiting frame 62 will rotate when moving on the limiting groove 61, so as to drive the mixing plate 63 to rotate while positively and negatively revolving; after the granite gravel and high-strength silicate cement are mixed, 0.8% basalt fiber and 0.2% polypropylene fiber anti-cracking agent by mass fraction are continuously added through the feeding pipe 43, and the above mixing steps are repeated, so that the granite gravel, high-strength silicate cement, basalt fiber and polypropylene fiber are uniformly mixed; then 0.7% polycarboxylic acid by mass fraction is added through the feeding pipe 43, and the above mixing steps are repeated; finally, 14.3% water by mass fraction is added through the feeding pipe 43, and the above mixing steps are repeated to complete the mixing of the mixed base layer material. The mixed base layer material can be transported to the storage tank through the conveying pipe 81, and the valve on the conveying pipe 81 is used to regulate the conveying flow of the mixed base layer material.

[0146] In this embodiment, the temperature control mechanism includes a heat preservation layer 8, a temperature control pipe 92 and a temperature sensor 91; the heat preservation layer 8 is fixedly installed on the inner wall of the aggregate tank 1, the temperature control pipe 92 is in a serpentine structure and is arranged along the inner wall of the aggregate tank 1, both ends of the temperature control pipe 92 extend to the outside of the aggregate tank 1 and are respectively in communication with the circulating liquid tank, and the circulating liquid in the temperature control pipe 92 regulates the temperature in the aggregate tank 1 through heat exchange; the temperature sensor 91 is arranged on the inner wall of the aggregate tank 1.

[0147] Referring to Figure 13Specifically, the protective frame 9 is fixedly installed on the lower surface of the sealing cover 2, the inner wall of the protective frame 9 is fixedly installed with the temperature sensor 91, the temperature sensor 91 monitors the temperature inside the aggregate tank 1, and the protective frame 9 prevents damage to the temperature sensor 91 during mixing of raw materials; the temperature control pipe 92 is fixedly installed in the groove on the inner wall of the aggregate tank 1, both ends of the temperature control pipe 92 extend to the outside of the aggregate tank 1, one end of the temperature control pipe 92 is the water inlet end, and the other end is the water outlet end; during implementation, select appropriate liquid as the circulating liquid for heat exchange, connect the circulating liquid tank containing the circulating liquid with the water inlet end of the water pump through the pipeline, connect the water outlet end of the water pump with one end (water inlet end) of the temperature control pipe 92 through the pipeline, and connect the other end (water outlet end) of the temperature control pipe 92 with the circulating liquid tank through the pipeline, so as to realize the circulation of the circulating liquid in the temperature control pipe 92, and realize the temperature control of the aggregate tank 1 through the circulation of the circulating liquid by heat exchange, so as to ensure that the temperature in the aggregate tank 1 during mixing is in the range of 20-25℃, and ensure that the hydration reaction of cement proceeds smoothly. In order to reduce heat loss and improve energy utilization efficiency, the heat preservation layer 8 is fixedly installed in the groove of the aggregate tank 1, and the material of the heat preservation layer 8 is preferably ceramic fiber blanket, which has excellent heat insulation performance, can reduce heat loss and improve energy utilization efficiency while preserving heat.

[0148] The above are several preferred embodiments of the preparation method of the present application, but cannot be regarded as a limitation on the technical solutions protected by the present application. Any alternative solution based on the technical idea of the present application and obtained by ordinary skilled personnel in the art without creative labor shall fall within the protection scope of the present application.

Claims

1. A method for constructing a crack-resistant cement-stabilized crushed stone base course, characterized in that, Includes the following steps: Step 1: Raw material selection and formulation design Based on the requirements of fracture toughness and splitting strength, cement, granite crushed stone, basalt fiber, polycarboxylate, polypropylene fiber and water were selected as raw materials, and the mass fraction ratio was designed. Cement 3.0%–7.0%, granite crushed stone 80%–90%, basalt fiber 0.3%–0.8%, polycarboxylate 0.1%–0.3%, polypropylene fiber 0.2%–0.7%, and water 4.0%–11.5%; The gradation design of the particle size D of the granite crushed stone is: 0 < D ≤ 5 mm, 5 < D ≤ 10 mm and 10 < D ≤ 20 mm, and the corresponding mass fractions are 20-25%, 25-35% and 25-35% respectively. The basalt fibers are 10mm-20mm in length and 10μm-15μm in diameter; The cement is high-strength silicate cement; Step 2: Preparation of hybrid base material Using a base material mixing device, cement, granite crushed stone, basalt fiber, polycarboxylate, polypropylene fiber and water are mixed evenly at a temperature of 20℃-25℃ according to the mass fraction ratio to obtain a mixed base material; Step 3: Laying The mixed base course material is laid on the road base course using a paver, static roller and vibratory roller to obtain a crushed stone base course. Step 4: Maintenance The crushed stone base layer is cured until it is completely dry, thus completing the construction of the toughened and crack-resistant cement-stabilized crushed stone base layer.

2. The construction method for crack-resistant cement-stabilized crushed stone base course according to claim 1, characterized in that, The specific process for preparing the mixed base material in step two is as follows: Granite crushed stones with particle sizes of 0-5mm, 5-10mm and 10-20mm were screened out using the screening mechanism in the mixing device; at the same time, it was ensured that the granite crushed stones of different particle sizes fell into the collection box (1) of the base material mixing device at mass fractions of 20%, 30% and 17% respectively. Following the order of adding cement, basalt fiber, polypropylene fiber, polycarboxylate, and water, each raw material is added to the collection box (1) of the mixing device according to the designed mass fraction. The mixing mechanism set inside the collection box (1) is used to mix the added raw materials evenly in sequence. At the same time, the temperature control mechanism on the collection box (1) ensures that the temperature inside the collection box (1) is maintained at 20℃-25℃. After mixing by the mixing mechanism, the mixed base material is obtained.

3. The construction method for crack-resistant cement-stabilized crushed stone base course according to claim 2, characterized in that, The mixing mechanism uses a rotational method of forward and reverse revolution plus rotation to mix the raw materials; the temperature control mechanism uses heat exchange to ensure that the temperature inside the collection box (1) is maintained at 20℃-25℃.

4. The construction method for crack-resistant cement-stabilized crushed stone base course according to claim 3, characterized in that, The specific process of step three is as follows: The mixed base material in the aggregate bin (1) is transported to the paver; Then use a paver to spread the mixed base material onto the road base; Then, a static roller was used for initial compaction; Then, a vibratory roller is used for further compaction; Finally, a nuclear density meter is used to check the compaction of the road base layer to ensure that it meets the design requirements and obtains the crushed stone base layer.

5. The construction method for crack-resistant cement-stabilized crushed stone base course according to claim 4, characterized in that, The specific process of step four is as follows: First, cover the crushed stone base with the insulating and moisturizing material; then, cure the crushed stone base by sprinkling water for no less than 7 days until the crushed stone base is completely dry, thus completing the construction of the toughened and crack-resistant cement-stabilized crushed stone base.

6. A construction system for implementing the crack-resistant cement-stabilized crushed stone base construction method of claim 5, characterized in that, The construction system includes: Base course material mixing device: used to prepare mixed base course materials from cement, granite crushed stone, basalt fiber, polycarboxylate, polypropylene fiber and water, and to transport them to the paver; Paver: Used to spread mixed base materials on the road base; Static roller: Used for initial compaction of paved mixed base course materials; Vibratory roller: Used to further compact pre-compacted mixed base materials to obtain crushed stone base; Nuclear density meter: used to test the density of crushed stone base courses; Sprinkler equipment: used for the maintenance of crushed stone base layers.

7. The construction system according to claim 6, characterized in that, The base material mixing device includes a collection box (1), a screening mechanism, a mixing mechanism, and a temperature control mechanism; The aggregate bin (1) is used to hold the added raw materials; the bottom of the aggregate bin (1) is connected to the conveying pipe (81), which is used to convey the mixed base material to the paver. The screening mechanism is located above the collection box (1) and is rotatably connected to the collection box (1). It is used to screen the granite crushed stone and add the granite crushed stone that meets the gradation requirements into the collection box (1). The mixing mechanism is located inside the collection box (1) and is used to mix the raw materials by a rotational method of forward and reverse revolution plus rotation; The temperature control mechanism is located inside the collection box (1) and is used to ensure that the temperature inside the collection box (1) is maintained at 20℃-25℃ by means of heat exchange.

8. The construction system according to claim 7, characterized in that, A sealing cover (2) is provided on the collection box (1); a feed pipe (43) and a conveying frame (41) are respectively provided on the upper surface of the sealing cover (2); the feed pipe (43) is used to add cement, basalt fiber, polycarboxylate, polypropylene fiber and water into the collection box (1); the conveying frame (41) is used to add granite crushed stone screened by the screening mechanism into the collection box (1); a weight sensor (42) is provided at the bottom of the conveying frame (41) to monitor the addition mass of granite crushed stone of different particle sizes; The screening mechanism includes a screening motor (31), a rotating rod (3), a screen (22), and a cam (4); a support rod is provided on the upper surface of the sealing cover (2); the screen (22) is located above the conveying frame (41) and is movably connected to the support rod, and the screen (22) extends and retracts along the axial direction of the support rod; the rotating rod (3) is located below the screen (22) and is rotatably connected to the outer wall of the support rod; the cam (4) is sleeved on the rotating rod (3) and contacts the bottom surface of the screen (22); the screening motor (31) is located on the sealing cover (2) and drives the rotating rod (3) to rotate.

9. The construction system according to claim 7, characterized in that, The mixing mechanism includes a mixing motor (5), a mixing rod (51), and a limiting frame (6), all located in the collection box (1); The mixing motor (5) is fixedly installed on the lower surface of the sealing cover (2); multiple rotating frames (52) are arranged outside the mixing rod (51) along the axial direction of the mixing rod (51), and the multiple rotating frames (52) are rotatably connected to the mixing rod (51), and multiple mixing plates (63) are arranged on the outer wall of each rotating frame (52), and the multiple mixing plates (63) are evenly distributed in a circle around the circumference of the mixing rod (51); a fixed frame (53) is movably connected between two adjacent rotating frames (52), and the fixed frame (53) is sleeved on the outside of the mixing rod (51); the mixing rod (51) is arranged in a vertical direction and is rotatably connected to the mixing motor (5) located above it; The inner wall of the fixed frame (53) is rotatably connected to a rotating rod (7), and both ends of the rotating rod (7) are fixedly mounted with a circular plate (71) with toothed columns; the outer surface of the mixing rod (51) is fixedly mounted with a rotating plate (72) with toothed columns; the toothed column of the circular plate (71) at one end of the rotating rod (7) meshes with the toothed column of the rotating plate (72), and the toothed column of the circular plate (71) at the other end meshes with the toothed column provided on the inner wall of the rotating frame (52); The limiting frame (6) is located inside the rotating frame (52) and is rotatably connected to the outer surface bearing of the mixing rod (51). A limiting groove (61) is opened on the outer surface of the limiting frame (6). A limiting frame (62) is slidably connected on the limiting groove (61). The limiting frame (62) is connected to the mixing plate (63).

10. The construction system according to claim 7, characterized in that, The temperature control mechanism includes an insulation layer (8), a temperature control tube (92), and a temperature sensor (91). The insulation layer (8) is fixedly installed on the inner wall of the collection box (1). The temperature control tube (92) has a serpentine structure and is arranged along the inner wall of the collection box (1). Both ends of the temperature control tube (92) extend to the outside of the collection box (1) and are connected to the circulating liquid tank respectively. The circulating liquid in the temperature control tube (92) regulates the temperature in the collection box (1) through heat exchange. The temperature sensor (91) is set on the inner wall of the collection box (1).

Images