CN114890715A - Concrete thin layer repairing material and preparation method and construction process thereof - Google Patents

Abstract

The application relates to the field of concrete repair materials, and particularly discloses a concrete thin layer repair material, a preparation method and a construction process thereof, wherein the repair material is prepared from the following raw materials in percentage by mass: 53-82% of early strength calcium material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergist, 4-10% of repair material and the balance of silicon dioxide; the synergist comprises magnesium aluminum silicate and triethanolamine oleate. The preparation method of the repair material comprises the following steps: step 1, performing synergistic treatment on the early strength calcium material; and 2, uniformly mixing the early strength calcium material treated in the step 1 with the rest raw materials to prepare the repair material. The prepared repairing material has super-high early strength, is simple and convenient to construct when used for repairing roads, does not need to seal the roads, and ensures the smooth passage of the roads; the repairing material has excellent cohesiveness with the old pavement and excellent wear resistance, and the repaired pavement can endure the friction of vehicles and people for a long time, thereby obviously improving the repairing effect on the pavement.

Description

Concrete thin layer repairing material and preparation method and construction process thereof

Technical Field

The application relates to the field of concrete repair materials, in particular to a concrete thin layer repair material and a preparation method and a construction process thereof.

Background

Concrete is the most widely used and most used building material in the world at present. The concrete structure is mainly used for bearing load or resisting various external forces, and is widely applied to modern engineering construction of ports, dams, roads, bridges, municipal works and the like.

With the rapid development of cities, the traffic capacity of a cement concrete pavement is required to be higher and higher, and the concrete pavement is very easy to have surface peeling, sand generation, bone exposure or cracking in the face of vehicles and people who are not familiar with daily free flowing, so that the concrete pavement is further developed into holes or pot holes.

When the pavement needs to be repaired, the ordinary portland cement, mineral powder and a water reducing agent are mostly adopted at present and uniformly mixed to repair, but the ordinary portland cement is slow in setting and hardening, long in repair period, poor in cohesiveness with the old pavement, incapable of enduring the friction of vehicles and people for a long time, poor in wear resistance, and the pavement needs to be closed to be cured and formed by concrete during repair, so that the smooth passage of the pavement is seriously influenced, and the traffic pressure is increased.

Disclosure of Invention

The application provides a concrete thin-layer repairing material and a preparation method and a construction process thereof, the prepared repairing material has super-high early strength, and is simple and convenient to construct when road repairing is carried out, a road does not need to be closed, and smooth passing of the road is guaranteed; the repairing material has excellent cohesiveness with the old pavement and excellent wear resistance, and the repaired pavement can endure the friction of vehicles and people for a long time, thereby obviously improving the repairing effect on the pavement.

In a first aspect, the concrete thin layer repairing material provided by the application adopts the following technical scheme:

a concrete thin layer repairing material is prepared from the following raw materials in percentage by mass: 53-82% of early strength calcium material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergist, 4-10% of repair material and the balance of silicon dioxide;

the regulator comprises the following raw materials in percentage by mass: 7-12% of water reducing agent, 2-4.5% of boric acid, 16-24% of sodium sulfate, 27-35% of aluminum sulfate and the balance of sodium carbonate; the synergist comprises magnesium aluminum silicate and triethanolamine oleate;

the repair material is prepared by the following steps: adding hydrophilic colloid into water to form a glue solution, adding sericite powder and ceramic micro powder into water, stirring to form a slurry, stirring the glue solution, adding a crosslinking agent while adding the slurry, wherein the addition amount of the crosslinking agent is 1-2.5% of the mass of the hydrophilic colloid, and uniformly stirring to obtain a repair material;

the wear-resistant sand is prepared by the following steps: uniformly mixing the carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent, and carrying out spray-burning treatment for 5-10 times while stirring, wherein the spray-burning conditions are as follows: the spraying and burning temperature is 100-120 ℃, the spraying and burning time is 4-8s each time, and the spraying and burning interval is 3-5min each time.

The early strength calcium material has very rapid hydration reaction, high early strength and no obvious increase of later strength, the early strength calcium material is subjected to synergistic treatment by adopting a synergist under certain conditions to ensure the early strength of the repair material, the hydration speed and the hydration heat of a system are adjusted by matching with a regulator to improve the reaction environment and conditions of the system, and the early strength calcium material subjected to synergistic treatment is compounded with the regulator, so that the repair material not only has excellent early strength performance, but also has good increase of later compressive strength. The magnesium aluminum silicate in the synergist has good disintegration performance when meeting water, can promote the dispersion and suspension of raw material components, improve the dispersion uniformity of the repair material in a system, and further improve the repair effect on the pavement.

Hydrophilic colloid is adopted to be cured and crosslinked under the action of a crosslinking agent to form a microcapsule, and the added sericite powder and ceramic micro powder are wrapped in the formation of the microcapsule, so that the repairing material can be extruded into the positions of pores, cracks and the like in concrete, a good repairing effect is achieved, the wear resistance of a concrete pavement can be effectively improved, the repaired pavement can be subjected to friction of vehicles and pedestrians for a long time, and the service life of the pavement is effectively prolonged.

Ordinary machine-made sand is filled in the concrete, the phenomenon of aggregate separation is produced at later stage easily, this application adopts carbon black miropowder, machine-made sand, rosin glyceride and auxiliary agent to cooperate each other, and carry out the spray-burning under specific conditions, the rosin glyceride can form good adhesion when the spray-burning, so that carbon black miropowder can adhere on machine-made sand surface, under the effect of auxiliary agent, not only can effectively promote and repair the material, the adhesion between the old road surface, form the compact concrete structure of inner structure, can also improve the wear resistance of concrete with the repair material is in coordination, thereby improve the repair effect to the road surface, adopt the spray-burning to handle the utility performance that can also promote the auxiliary agent, further improve the repair effect to the road surface.

Preferably, the hydrophilic colloid comprises at least two of gelatin, gum arabic, xanthan gum and carrageenan.

By adopting the technical scheme, the selection of the components of the hydrophilic colloid is optimized, so that the hydrophilic colloid is favorably cured and crosslinked with a crosslinking agent to form a microcapsule, and the repairing effect on the pavement is improved; the hydrophilic colloid is prepared by compounding gelatin, Arabic gum and xanthan gum, so that the forming quality of the microcapsule can be improved, and filling and repairing of cracks and pores are facilitated, so that the repairing effect on the pavement is improved.

Preferably, the cross-linking agent is selected from one of formaldehyde, glutaraldehyde and dialdehyde starch.

By adopting the technical scheme, the selection of the cross-linking agent is optimized, the cross-linking and curing effect is improved, the formaldehyde and the glutaraldehyde have certain volatility and toxicity, the dialdehyde starch is a polyaldehyde polymer, the biocompatibility is good, the dialdehyde starch can perform cross-linking reaction with amino and imino groups of various collagens or gelatins, the cross-linking effect is good, and the dialdehyde starch is frequently selected to be used as the cross-linking agent at present.

Preferably, the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is (1.7-3): 0.4-0.9): 0.3-0.7.

By adopting the technical scheme, the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is optimized, so that the repairing material can not only fill and repair crack pores, but also effectively improve the wear resistance of a pavement.

Preferably, the auxiliary agent is oxidized polyethylene wax.

By adopting the technical scheme, the oxidized polyethylene wax has excellent wettability and dispersibility, can promote the uniform adhesion of carbon black micropowder on the surface of the machine-made sand during spray-burning, can be used as an auxiliary agent to promote the effect of rosin glyceride to be exerted during spray-burning, further improves the wear resistance of the pavement, has good coupling property, can improve the cohesiveness between the machine-made sand and other raw material components while regulating the viscosity of the system, improves the cohesiveness and the adhesiveness between new and old pavements, improves the strength of concrete, and improves the repairing effect on the pavement.

Preferably, the mass ratio of the carbon black micro powder to the machine-made sand to the rosin glyceride to the auxiliary agent is (1-2) to (4-7) to (0.4-0.9) to (0.2-0.7).

By adopting the technical scheme, the dosage relationship among the carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent is optimized, the proportioning relationship is adjusted, the effectiveness of all the components is promoted, and the wear resistance and the compressive strength of the pavement are synergistically improved.

Preferably, the mass ratio of the magnesium aluminum silicate to the triethanolamine oleate is 0.7 (2.4-3.6).

By adopting the technical scheme, the mass ratio of the magnesium aluminum silicate to the triethanolamine oleate is optimized, and the synergistic effect on the early-strength calcium material is improved, so that the concrete not only has excellent early strength, but also can have good strength increase in the later period.

Preferably, on the basis of the repair material, the early strength calcium material comprises 11-19% of tricalcium silicate, 14-20% of dicalcium silicate, 15-21% of tricalcium aluminate, 12-18% of tetracalcium aluminoferrite and 1-4% of calcium sulfate.

By adopting the technical scheme, the components and the using amount of the early-strength calcium material are optimized, and the early strength of the concrete is ensured, so that the pavement repairing is carried out only when a few vehicles are used at night, the road does not need to be closed, and the daily traffic is ensured.

In a second aspect, the application provides a preparation method of a concrete thin layer repairing material, which adopts the following technical scheme:

a preparation method of a concrete thin layer repairing material comprises the following steps:

step 1, performing synergistic treatment on the early strength calcium material: uniformly mixing magnesium aluminum silicate and triethanolamine oleate, taking a synergist as a medium, and performing wet ball milling on the early-strength calcium material;

and 2, uniformly mixing the early strength calcium material treated in the step 1 with the rest raw materials to prepare the repair material.

By adopting the technical scheme, the early strength calcium material is subjected to wet ball milling, the crystal form of the early strength calcium material can be effectively improved, the synergist is used as a medium, the surface activity of the early strength calcium material can be further improved, and the early strength calcium material is compounded with a regulator and the like, so that the repair material not only has excellent early strength performance, but also has good increase of later-stage compressive strength.

In a third aspect, the application provides a construction process of a concrete thin layer repairing material, which adopts the following technical scheme:

a construction process of a concrete thin layer repairing material comprises the following steps:

step one, planing and milling the concrete damaged part at least twice, and extending 140-160mm inwards along the periphery of the concrete damaged part to deepen planing and milling treatment to form a repair part;

cleaning the planed and milled objects of the repairing part, and flushing and wetting the repairing part by adopting water flow so as to enable the humidity of the repairing part to be 70-85%;

and step three, fully and uniformly stirring the prepared concrete thin layer repairing material and water to prepare a mixture, controlling the fluidity of the mixture to be 150-220mm, and directly coating the mixture on a repairing part.

By adopting the construction steps, the construction is simple and convenient, the dosage ratio of water and the repair material, commonly known as the water-cement ratio, is generally controlled according to different environmental temperatures, and the specific corresponding relation is shown in table 1.

TABLE 1

Temperature/. degree.C	6-10	10-15	15-20	20-25	25-30
						Water cement ratio	0.2-0.22	0.22-0.24	0.24-0.26	0.26-0.28	0.28-0.32

In summary, the present application has the following beneficial effects:

1. hydrophilic colloid is adopted to be cured and crosslinked under the action of a crosslinking agent to form a microcapsule, and the added sericite powder and ceramic micro powder are wrapped in the formation of the microcapsule, so that the repairing material can be extruded into the positions of pores, cracks and the like in concrete, a good repairing effect is achieved, the wear resistance of a concrete pavement can be effectively improved, the repaired pavement can be subjected to friction of vehicles and pedestrians for a long time, and the service life of the pavement is effectively prolonged.

2. Adopt carbon black miropowder, machine-made sand and rosin glyceride and auxiliary agent mutually support, and carry out the spray-burning under specific conditions, the rosin glyceride can form good adhesion when the spray-burning, so that carbon black miropowder can the adhesion on machine-made sand surface, under the effect of auxiliary agent, not only can effectively promote with the repairing material, the adhesion between the old road surface, form the compact concrete structure of inner structure, can also improve the wear resistance of concrete with the repairing material is in coordination, thereby improve the repair effect to the road surface, adopt the spray-burning processing and can also promote the performance of auxiliary agent, further improve the repair effect to the road surface.

3. The early strength calcium material is subjected to wet ball milling, the crystal form of the early strength calcium material can be effectively improved, the synergist is used as a medium, the surface activity of the early strength calcium material can be further improved, and the early strength calcium material is compounded with a regulator and the like, so that the repair material not only has excellent early strength performance, but also has good increase of later-stage compressive strength.

Detailed Description

The present application will be described in further detail with reference to examples.

The raw materials used in the application are all common commercially available raw materials, wherein gelatin, Arabic gum and xanthan gum are all purchased from Shandong Lusen Biotechnology Co., Ltd, and ceramic micro powder and carbon black micro powder are purchased from Nemous Haisen mineral products Co., Ltd.

Preparation example of repair Material

Preparation example 1

The repair material is prepared by the following steps: adding hydrophilic colloid into water at 40 ℃ to form glue solution, adding sericite powder and ceramic micro powder into the water, stirring to form slurry with the solid content of 50%, stirring the glue solution, then adding glutaraldehyde dropwise at a constant speed while adding the slurry, wherein the addition amount of the glutaraldehyde is 1% of the mass of the hydrophilic colloid, and uniformly stirring to obtain a repair material;

wherein the hydrophilic colloid is gum arabic and xanthan gum with the mass ratio of 1:0.5, and the mass ratio of the hydrophilic colloid, sericite powder and ceramic micropowder is 1.7:0.4: 0.9.

Preparation example 2

The repair material is prepared by the following steps: adding hydrophilic colloid into water at 40 ℃ to form glue solution, adding sericite powder and ceramic micro powder into the water, stirring to form slurry with the solid content of 60%, stirring the glue solution, then adding the slurry while dropwise adding formaldehyde at a constant speed, wherein the adding amount of the formaldehyde is 2.5% of the mass of the hydrophilic colloid, and uniformly stirring to obtain a repair material;

wherein the hydrophilic colloid is gelatin, carrageenan and xanthan gum with the mass ratio of 1.2:1.5:1, and the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is 3:0.9: 0.7.

Preparation example 3

The repair material is prepared by the following steps: adding hydrophilic colloid into water at 40 ℃ to form glue solution, adding sericite powder and ceramic micro powder into the water, stirring to form slurry with the solid content of 55%, stirring the glue solution, then adding the slurry while dropwise adding formaldehyde at a constant speed, wherein the adding amount of the formaldehyde is 2% of the mass of the hydrophilic colloid, and uniformly stirring to obtain the repair material;

wherein the hydrophilic colloid is carrageenan, Arabic gum and xanthan gum with the mass ratio of 1.2:1.5:1, and the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is 3:0.9: 0.7.

Preparation example 4

The difference from preparation example 3 is that the hydrocolloids are gelatin, gum arabic and xanthan gum in a mass ratio of 1:1:0.6, the cross-linking agent is dialdehyde starch, and the rest is the same as preparation example 3.

Preparation example 5

The difference from preparation example 4 is that the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic fine powder is 2.3:0.7:0.5, and the rest is the same as that of preparation example 4.

Preparation example 6

The difference from the preparation example 5 is that the hydrophilic colloid is gelatin and carrageenan with the mass ratio of 1:1, and the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is 1.3:0.2: 2; the rest is the same as in preparation example 5.

Preparation example of abrasion-resistant Sand

Preparation example 1

The wear-resistant sand is prepared by the following steps: uniformly mixing carbon black micro powder, machine-made sand, rosin glyceride and oxidized polyethylene wax, stirring and carrying out spray-burning treatment for 5 times, wherein the spray-burning treatment conditions are as follows: the spray burning temperature is 100 ℃, the time of each spray burning is 8s, and the interval of each spray burning is 3 min; wherein the mass ratio of the carbon black micro powder, the machine-made sand, the rosin glyceride and the oxidized polyethylene wax is 1:4:0.4: 0.2.

Preparation example two the abrasion resistant sand was prepared by the following steps: uniformly mixing carbon black micro powder, machine-made sand, rosin glyceride and oxidized polyethylene wax, and carrying out spray-burning treatment for 10 times while stirring, wherein the spray-burning treatment conditions are as follows: the spray burning temperature is 120 ℃, the time of each spray burning is 4s, and the interval of each spray burning is 5 min; wherein the mass ratio of the carbon black micro powder, the machine-made sand, the rosin glyceride and the oxidized polyethylene wax is 2:7:0.9: 0.7.

Preparation example three

The wear-resistant sand is prepared by the following steps: uniformly mixing carbon black micro powder, machine-made sand, rosin glyceride and oxidized polyethylene wax, and carrying out spray-burning treatment for 8 times while stirring, wherein the spray-burning treatment conditions are as follows: the spray burning temperature is 105 ℃, the spray burning time is 6s each time, and the spray burning interval is 4min each time; wherein the mass ratio of the carbon black micro powder, the machine-made sand, the rosin glyceride and the oxidized polyethylene wax is 1.8:6:0.6: 0.5.

Preparation example four

The wear-resistant sand is prepared by the following steps: uniformly mixing carbon black micro powder, machine-made sand, rosin glyceride and oxidized polyethylene wax, and carrying out spray-burning treatment for 3 times while stirring, wherein the spray-burning treatment conditions are as follows: the spray burning temperature is 95 ℃, the time of each spray burning is 6s, and the interval of each spray burning is 8 min; wherein the mass ratio of the carbon black micro powder, the machine-made sand, the rosin glyceride and the oxidized polyethylene wax is 0.4:8.2:0.2: 0.1.

Examples

Example 1

The concrete thin layer repairing material is prepared from the following raw materials in percentage by mass: 19% of tricalcium silicate, 14% of dicalcium silicate, 15% of tricalcium aluminate, 18% of tetracalcium aluminoferrite, 1% of calcium sulfate, 15% of wear-resistant sand prepared in preparation example one, 2% of regulator, 1% of synergist, 4% of repairing material prepared in preparation example 1 and the balance of silicon dioxide;

the regulator comprises the following raw materials in percentage by mass: 7% of polycarboxylic acid water reducing agent, 2% of boric acid, 16% of sodium sulfate, 35% of aluminum sulfate and the balance of sodium carbonate;

the synergist comprises magnesium aluminum silicate and triethanolamine oleate with the mass ratio of 0.7: 2.4.

The preparation method of the concrete thin layer repairing material comprises the following steps:

step 1, performing synergistic treatment on the early strength calcium material: uniformly mixing tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite and calcium sulfate to obtain an early strength calcium material, uniformly mixing magnesium aluminum silicate and triethanolamine oleate to serve as a medium, and carrying out wet ball milling on the early strength calcium material for 1 hour;

and 2, uniformly mixing the early strength calcium material treated in the step 1 with the rest raw materials to prepare the repair material.

The construction process of the concrete thin layer repairing material comprises the following steps:

planing and milling the damaged part of the concrete twice, and extending 160mm inwards along the periphery of the damaged part of the concrete to perform deepening planing and milling treatment to form a repair part;

cleaning the planed and milled objects of the repairing part, and flushing and wetting the repairing part by adopting water flow so as to enable the humidity of the repairing part to be 70%;

and step three, fully and uniformly stirring the prepared concrete thin layer repairing material and water to prepare a mixture, wherein the water-cement ratio is 0.22, the fluidity of the mixture is 150mm, and the mixture is directly smeared on a repairing part.

Example 2

The concrete thin layer repairing material is different from the concrete thin layer repairing material in example 1 in that the concrete thin layer repairing material is prepared from the following raw materials in percentage by mass: 11% of tricalcium silicate, 20% of dicalcium silicate, 21% of tricalcium aluminate, 12% of tetracalcium aluminoferrite, 4% of calcium sulfate, 7% of wear-resistant sand prepared in preparation example one, 6% of regulator, 4% of synergist, 10% of repair material prepared in preparation example 1 and the balance of silicon dioxide;

the regulator comprises the following raw materials in percentage by mass: 12% of polycarboxylic acid water reducing agent, 4.5% of boric acid, 24% of sodium sulfate, 27% of aluminum sulfate and the balance of sodium carbonate;

the synergist comprises magnesium aluminum silicate and triethanolamine oleate with the mass ratio of 0.7: 3.6.

The construction process of the concrete thin layer repairing material comprises the following steps:

the method comprises the following steps that firstly, a concrete damaged part is planed and milled twice, and the concrete damaged part extends inwards for 150mm along the periphery of the concrete damaged part to be planed and milled deeply to form a repair part;

cleaning the planed and milled objects of the repairing part, and flushing and wetting the repairing part by adopting water flow so as to enable the humidity of the repairing part to be 80%;

and step three, fully and uniformly stirring the prepared concrete thin layer repairing material and water to prepare a mixture, wherein the water-cement ratio is 0.22, the fluidity of the mixture is 200mm, and the mixture is directly smeared on a repairing part.

The rest is the same as in example 1.

Example 3

The concrete thin layer repairing material is different from the concrete thin layer repairing material in example 1 in that the concrete thin layer repairing material is prepared from the following raw materials in percentage by mass: 15% of tricalcium silicate, 17% of dicalcium silicate, 21% of tricalcium aluminate, 15% of tetracalcium aluminoferrite, 2.5% of calcium sulfate, 11% of wear-resistant sand prepared in preparation example I, 4% of regulator, 2.5% of synergist, 7% of repair material prepared in preparation example 1 and the balance of silicon dioxide;

the rest is the same as in example 1.

Example 4

The difference from the example 3 is that the synergist comprises magnesium aluminum silicate and triethanolamine oleate with the mass ratio of 0.7:3, and the rest is the same as the example 3.

Example 5

The difference from the embodiment 4 is that the regulator comprises the following raw materials in percentage by mass: 10% of polycarboxylic acid water reducing agent, 3% of boric acid, 20% of sodium sulfate, 30% of aluminum sulfate and the balance of sodium carbonate; the rest is the same as in example 4.

Example 6

The difference from example 5 is that the repair material obtained in preparation example 2 was selected and the rest was the same as example 5.

Example 7

The difference from example 5 is that the repair material obtained in preparation example 3 was selected and the rest was the same as example 5.

Example 8

The difference from example 5 is that the repair material obtained in preparation example 4 was selected and the rest was the same as example 5.

Example 9

The difference from example 5 is that the repair material obtained in preparation example 5 was selected and the rest was the same as example 5.

Example 10

The difference from example 5 is that the repair material obtained in preparation example 6 was selected and the rest was the same as example 5.

Example 11

The difference from example 9 is that the abrasion-resistant sand obtained in preparation example two was used, and the rest was the same as example 9.

Example 12

The difference from example 9 is that the abrasion-resistant sand obtained in preparation example three was used, and the rest was the same as example 9.

Example 13

The difference from example 9 is that the abrasion-resistant sand obtained in preparation example four was used, and the rest was the same as example 9.

Comparative example

Comparative example 1

The difference from example 12 is that the early strength calcium material was replaced with ordinary portland cement in equal amount, and the rest was the same as example 12.

Comparative example 2

The difference from example 12 is that no synergist was added and no synergist treatment was performed on the early strength calcium material, and the rest was the same as example 12.

Comparative example 3

The difference from example 12 is that the repair mass is produced by the following steps: uniformly mixing gelatin, Arabic gum, xanthan gum, sericite powder and ceramic micro powder to prepare a repair material; the rest is the same as in example 12.

Comparative example 4

The difference from example 12 is that the same amount of wear-resistant sand as that of example 12 was replaced with machine-made sand, and the rest was the same as that of example 12.

Comparative example 5

The difference from example 12 is that the abrasion-resistant sand was prepared by the following steps: uniformly mixing the carbon black micro powder, the machine-made sand, the rosin glyceride and the oxidized polyethylene wax to prepare wear-resistant sand; the rest is the same as in example 12.

Performance test

The concrete thin-layer repair materials prepared in examples 1 to 13 and comparative examples 1 to 5 were measured for compressive strength and bonding strength for 7h, 1d and 28d according to GB/T25181-2019 Ready-mix mortar; measuring the abrasion loss according to JTG E30-2005, cement concrete abrasion resistance test method; the results are reported in table 2.

TABLE 2

By combining the examples 1-13 and the table 2, the concrete thin layer repairing material prepared by the method has super early strength, the compressive strength of 1h can reach more than 25MPa, and the later compressive strength is well increased; the modified pavement has the advantages of excellent wear resistance and bonding strength, good bonding force of new and old pavements, capability of enduring the friction of vehicles and pedestrians after being repaired, and excellent wear resistance.

It can be seen from the combination of example 12 and comparative examples 1-2 and table 2 that, in comparative example 1, the ordinary portland cement is used, which has slow setting and hardening, low early strength and long pavement repair period, and when the pavement is repaired by the repair material prepared in comparative example 1, the road needs to be closed, the traffic is interrupted, the traffic of the road is seriously affected, and the traffic pressure is increased. Although the early strength calcium material is added in the comparative example 2, the synergist is not added for synergistic treatment, the repair material prepared in the comparative example 2 has better early strength than that of the repair material prepared in the comparative example 1, but the later-stage compressive strength is not greatly increased, so that the early strength calcium material is subjected to synergistic treatment by the synergist under a certain condition, the early strength of the repair material is ensured, and the early strength calcium material subjected to synergistic treatment is compounded with the regulator, so that the repair material not only has excellent early strength performance, but also has good increase of the later-stage compressive strength, and the repair effect on the pavement is remarkably improved.

By combining the example 12 and the comparative example 3 and combining the table 2, the comparative example 3 only simply mixes the raw material components in the repair material, and the prepared repair material has poor compressive strength in the whole age, poor adhesive force and wear resistance of new and old pavements, and is easy to generate cracks, peeling, exposed bones or holes and the like in a short time; the hydrophilic colloid is cured and crosslinked under the action of the crosslinking agent to form the microcapsule, and the added sericite powder and ceramic micro powder are wrapped in the formation of the microcapsule, so that the repairing material can be extruded into the positions of pores, cracks and the like in the concrete to achieve a good repairing effect, the wear resistance of the concrete pavement can be effectively improved, the repaired pavement can be subjected to friction of vehicles and pedestrians for a long time, the service life of the pavement is effectively prolonged, and the repairing effect on the pavement is remarkably improved.

It can be seen by combining example 12 and comparative examples 4-5 and table 2 that, in comparative example 4, the compressive strength of the repair material prepared by using the common machine-made sand is reduced, the abrasion loss is obviously increased, and the abrasion resistance is obviously reduced, while in comparative example 5, only raw material components in the abrasion-resistant sand are simply mixed, and the comprehensive performance of the repair material prepared by using the common machine-made sand is slightly better than that of comparative example 4, but the comprehensive performance of the repair material cannot be effectively improved. The rosin glyceride can form excellent binding power during spray burning so that the carbon black micro powder can be adhered to the surface of the machine-made sand, and under the action of the auxiliary agent, the binding power between the carbon black micro powder and a repairing material and an old road surface can be effectively promoted, a concrete structure with a compact internal structure is formed, and the wear resistance of concrete can be improved by the rosin glyceride and the repairing material in a synergistic manner. Therefore, only the wear-resistant sand prepared by the specific preparation method disclosed by the application is matched with other raw material components, and the pavement repairing effect can be obviously improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. The concrete thin layer repairing material is characterized by being prepared from the following raw materials in percentage by mass: 53-82% of early strength calcium material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergist, 4-10% of repair material and the balance of silicon dioxide;

the regulator comprises the following raw materials in percentage by mass: 7-12% of water reducing agent, 2-4.5% of boric acid, 16-24% of sodium sulfate, 27-35% of aluminum sulfate and the balance of sodium carbonate; the synergist comprises magnesium aluminum silicate and triethanolamine oleate;

the repair material is prepared by the following steps: adding hydrophilic colloid into water to form a glue solution, adding sericite powder and ceramic micro powder into water, stirring to form a slurry, stirring the glue solution, adding a crosslinking agent while adding the slurry, wherein the addition amount of the crosslinking agent is 1-2.5% of the mass of the hydrophilic colloid, and uniformly stirring to obtain a repair material;

the wear-resistant sand is prepared by the following steps: uniformly mixing the carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent, and carrying out spray-burning treatment for 5-10 times while stirring, wherein the spray-burning conditions are as follows: the spraying and burning temperature is 100-120 ℃, the spraying and burning time is 4-8s each time, and the spraying and burning interval is 3-5min each time.

2. The thin concrete layer repair material according to claim 1, wherein: the hydrophilic colloid comprises at least two of gelatin, arabic gum, xanthan gum and carrageenan.

3. The thin concrete layer repair material according to claim 1, wherein: the cross-linking agent is selected from one of formaldehyde, glutaraldehyde and dialdehyde starch.

4. The thin concrete layer repair material according to any one of claims 1 to 3, wherein: the mass ratio of the hydrophilic colloid, the sericite powder and the ceramic micro powder is (1.7-3) to (0.4-0.9) to (0.3-0.7).

5. The thin concrete layer repair material according to claim 1, wherein: the auxiliary agent is oxidized polyethylene wax.

6. The thin concrete layer repair material according to claim 1 or 5, wherein: the mass ratio of the carbon black micro powder to the machine-made sand to the rosin glyceride to the auxiliary agent is (1-2) to (4-7) to (0.4-0.9) to (0.2-0.7).

7. The thin concrete layer repair material according to claim 1, wherein: the mass ratio of the magnesium aluminum silicate to the triethanolamine oleate is 0.7 (2.4-3.6).

8. The thin concrete layer repair material according to claim 1 or 7, wherein: based on the repair material, the early strength calcium material comprises 11-19% of tricalcium silicate, 14-20% of dicalcium silicate, 15-21% of tricalcium aluminate, 12-18% of tetracalcium aluminoferrite and 1-4% of calcium sulfate.

9. The method for producing a concrete thin-layer repair material according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

step 1, performing synergistic treatment on the early strength calcium material: uniformly mixing magnesium aluminum silicate and triethanolamine oleate, taking a synergist as a medium, and performing wet ball milling on the early-strength calcium material;

and 2, uniformly mixing the early strength calcium material treated in the step 1 with the rest raw materials to prepare the repair material.

10. A construction process of a concrete thin layer repairing material is characterized in that: the method comprises the following steps:

step one, planing and milling the concrete damaged part at least twice, and extending 140-160mm inwards along the periphery of the concrete damaged part to deepen planing and milling treatment to form a repair part;

cleaning the planed and milled objects of the repairing part, and flushing and wetting the repairing part by adopting water flow so as to enable the humidity of the repairing part to be 70-85%;

and step three, fully and uniformly stirring the concrete thin layer repairing material prepared by any one of claims 1-9 with water to prepare a mixture, controlling the fluidity of the mixture to be 150-220mm, and directly coating the mixture on a repairing part.