CN114890715B - 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 in particular 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 calcareous material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergistic agent, 4-10% of repairing material and the balance of silicon dioxide; the synergistic agent comprises magnesium aluminum silicate and triethanolamine oleate. The preparation method of the repair material comprises the following steps: step 1, performing synergistic treatment on early strength calcareous material; and 2, uniformly mixing the early-strength calcium material treated in the step 1 with the rest raw materials to obtain the repair material. The prepared repairing material is super-early-strength, and is simple and convenient to construct when repairing the road, the road is not required to be closed, and smooth traffic of the road is ensured; the repairing material has excellent adhesion with the old pavement, has excellent wear resistance, and the repaired pavement can endure the friction of vehicles and people in the past, 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, a preparation method and a construction process thereof.

Background

Concrete is the building material with the most widely used and largest usage 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.

Along with the rapid development of cities, the requirements on the traffic capacity of the cement concrete pavement are higher and higher, and the cement concrete pavement is very easy to peel off, sand, open bones or crack to form holes or pits in face of daily vehicles and people who run around.

When the road surface needs to be repaired, the common silicate cement, mineral powder and additives such as a water reducing agent are adopted at present, and the mixture is uniformly mixed for repair, but the common silicate cement is slow in setting and hardening, long in repair period, poor in cohesiveness with the old road surface, incapable of long-term experiencing friction of vehicles and people, poor in wear resistance, and the road needs to be closed for curing and molding of concrete when the road is repaired, so that smooth traffic of the road is seriously influenced, and traffic pressure is increased.

Disclosure of Invention

The application provides a concrete thin layer repairing material, a preparation method and a construction process thereof, wherein the prepared repairing material is super-early-strength, and is simple and convenient to construct when being used for repairing a road, and the road is not required to be closed, so that smooth traffic of the road is ensured; the repairing material has excellent adhesion with the old pavement, has excellent wear resistance, and can withstand the friction of vehicles and people for a long time after repairing the pavement, thereby remarkably improving the repairing effect on the pavement.

In a first aspect, the present application provides a concrete thin layer repair material, which 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 calcareous material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergistic agent, 4-10% of repairing material and the balance of silicon dioxide;

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

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

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

The early strength calcium material has very rapid hydration reaction, high early strength, but no obvious increase in later strength, adopts a synergistic agent to carry out synergistic treatment on the early strength calcium material under certain conditions, ensures the early strength of the repairing material, and is matched with a regulator to regulate the hydration speed and the hydration heat of a system, so that the reaction environment and the conditions of the system are improved, and the synergistic treated early strength calcium material and the regulator are compounded, so that the repairing material not only has excellent early strength, but also has good increase in later compressive strength. The magnesium aluminum silicate in the synergist has good disintegration performance when meeting water, can promote the dispersion and suspension of various raw material components, improves the dispersion uniformity of the repairing material in a system, and further improves the repairing effect on the pavement.

The hydrophilic colloid is adopted to be solidified 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 play a good repairing effect, and the wear resistance of the concrete pavement can be effectively improved, so that the repaired pavement can be subjected to the friction of vehicles and pedestrians for a long time, and the service life of the pavement is effectively prolonged.

The common machine-made sand is filled in the concrete, aggregate separation is easy to generate in the later stage, the carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent are matched with each other, and are subjected to spray burning under specific conditions, the rosin glyceride can form excellent binding force when being subjected to spray burning, so that the carbon black micro powder can be adhered to the surface of the machine-made sand, the binding force between the repairing material and an old pavement can be effectively promoted under the action of the auxiliary agent, a concrete structure with compact internal structure is formed, the wear resistance of the concrete can be improved in cooperation with the repairing material, the repairing effect on the pavement is improved, the effect of the auxiliary agent can be further promoted by adopting spray burning treatment, and the repairing effect on the pavement is further improved.

Preferably, the hydrophilic colloid comprises at least two of gelatin, acacia, 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 can be better solidified and crosslinked with the crosslinking agent to form microcapsules, and the repairing effect on the pavement is improved; the hydrophilic colloid is usually compounded from gelatin, acacia and xanthan gum, so that the formation quality of the microcapsule can be improved, and the filling and repairing of cracks and pores are facilitated, thereby improving the repairing effect on the pavement.

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 curing effect is improved, formaldehyde and glutaraldehyde have certain volatility and toxicity, and dialdehyde starch is a polyaldehyde polymer, has good biocompatibility, can perform cross-linking reaction with amino groups and imino groups of various collagens or gelatins, has good cross-linking effect, and is mainly used as the cross-linking agent at present.

Preferably, the mass ratio of the hydrophilic colloid to the sericite powder to 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 not only can fill and repair crack pores, but also can effectively improve the wear resistance of the 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 even adhesion of carbon black micro powder on the surface of machine-made sand during the spraying and burning, and can promote the effectiveness of rosin glyceride as an auxiliary agent during the spraying and burning, so that the wear resistance of the pavement is further improved, the oxidized polyethylene wax has good coupling property, the viscosity of the system is regulated, and meanwhile, the cohesiveness between the machine-made sand and other raw material components can be improved, so that the cohesiveness and the laminating property between new and old pavement are improved, the strength of concrete is improved, and the repairing effect on the pavement is improved.

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): (4-7): (0.4-0.9): (0.2-0.7).

By adopting the technical scheme, the dosage relation among the carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent is optimized, the proportioning relation is adjusted, the effect exertion among 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 synergism of the early-strength calcium material is improved, so that the concrete not only has excellent early strength, but also has good strength increase in the later period.

Preferably, the early strength calcareous 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 taking the repairing material as a reference.

By adopting the technical scheme, the components and the dosage of the early-strength calcium material are optimized, and the early strength of concrete is ensured, so that the repair of the pavement is only carried out when vehicles are fewer at night, the road is not required to be closed, and the daily traffic is ensured.

In a second aspect, the present application provides a method for preparing a concrete thin layer repair material, which adopts the following technical scheme:

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

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

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

Through adopting above-mentioned technical scheme, carry out wet ball-milling to early strength calcareous material, can effectively improve the crystal form of early strength calcareous material, adopt synergist as the medium, can further improve the surface activity of early strength calcareous material, after compounding with regulators etc. for repairing material not only possesses excellent early strength performance, has good later stage compressive strength's increase moreover.

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

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

firstly, planing and milling a damaged part of concrete at least twice, and extending inwards for 140-160mm along the periphery of the damaged part of the concrete to carry out deepening planing and milling treatment to form a repairing part;

step two, cleaning the planing and milling object of the repairing part, flushing the repairing part by water flow and wetting the repairing part so that the humidity of the repairing part is 70-85%;

and thirdly, 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 the repairing part.

The construction steps are adopted, the construction is simple and convenient, the dosage ratio of water to repair materials is generally controlled according to different environmental temperatures, commonly called water-cement ratio, and the specific corresponding relation is shown in the table 1.

TABLE 1

Temperature/. Degree.C	6-10	10-15	15-20	20-25	25-30
						Water to ash 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. the hydrophilic colloid is adopted to be solidified 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 play a good repairing effect, and the wear resistance of the concrete pavement can be effectively improved, so that the repaired pavement can be subjected to the friction of vehicles and pedestrians for a long time, and the service life of the pavement is effectively prolonged.

2. The carbon black micro powder, the machine-made sand, the rosin glyceride and the auxiliary agent are matched with each other, and are subjected to spray burning under specific conditions, and the rosin glyceride can form excellent binding force when being subjected to 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 force between the carbon black micro powder and a repairing material and an old pavement can be effectively promoted, a concrete structure with compact internal structure is formed, and the wear resistance of the concrete can be synergistically improved with the repairing material, so that the repairing effect on the pavement is improved.

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

Detailed Description

The present application is described in further detail below with reference to examples.

The raw materials used in the method are all common and commercially available raw materials, wherein gelatin, arabic gum and xanthan gum are all purchased from Shandong Lu Sen biotechnology Co., ltd, and ceramic micro powder and carbon black micro powder are purchased from Liangguangang Haossen mineral products Co.

Repair Material preparation example

Preparation example 1

The repairing material is prepared by the following steps: adding the hydrophilic colloid into water at 40 ℃ to form a 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 dropwise adding glutaraldehyde 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 repairing material;

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

Preparation example 2

The repairing material is prepared by the following steps: adding the hydrophilic colloid into water at 40 ℃ to form a glue solution, adding sericite powder and ceramic micro powder into the water, stirring to form slurry with solid content of 60%, stirring the glue solution, then adding the slurry while dripping formaldehyde at a uniform speed, wherein the adding amount of the formaldehyde is 2.5% of the mass of the hydrophilic colloid, and stirring uniformly to prepare a repairing 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, sericite powder and ceramic micro powder is 3:0.9:0.7.

Preparation example 3

The repairing material is prepared by the following steps: adding the hydrophilic colloid into water at 40 ℃ to form a 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 dripping 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 a repairing 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, sericite powder and ceramic micro powder is 3:0.9:0.7.

Preparation example 4

The difference from preparation example 3 is that the hydrocolloid is gelatin, acacia and xanthan gum in a mass ratio of 1:1:0.6, the crosslinking 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 hydrocolloid, the sericite powder and the ceramic micro powder is 2.3:0.7:0.5, and the rest is the same as preparation example 4.

Preparation example 6

The difference with 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, sericite powder and ceramic micro powder is 1.3:0.2:2; the remainder was the same as in preparation example 5.

Anti-sanding preparation example

Preparation example one

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

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

Preparation example three

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

Preparation example IV

The anti-frosting agent is prepared by the following steps: uniformly mixing carbon black micropowder, machine-made sand, rosin glyceride and oxidized polyethylene wax, and carrying out spray-sintering treatment for 3 times while stirring, wherein the spray-sintering treatment conditions are as follows: the spraying temperature is 95 ℃, the spraying time is 6s each time, and the spraying interval is 8min 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 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: tricalcium silicate 19%, dicalcium silicate 14%, tricalcium aluminate 15%, tetracalcium aluminoferrite 18%, calcium sulfate 1%, wear-resistant sand 15% prepared in preparation example I, regulator 2%, synergist 1%, repairing material 4% prepared in preparation example 1 and silica balance;

the regulator comprises the following raw materials in percentage by mass: 7% of polycarboxylate water reducer, 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 repair material comprises the following steps:

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

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

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

firstly, planing and milling a damaged part of concrete twice, and extending 160mm inwards along the periphery of the damaged part of the concrete to carry out deepening planing and milling treatment to form a repairing part;

step two, cleaning the planing and milling object of the repairing part, flushing the repairing part by water flow and wetting the repairing part so that the humidity of the repairing part is 70%;

and thirdly, 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 directly coating the mixture on a repairing part.

Example 2

The difference with the embodiment 1 is 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 frostproof powder prepared in preparation example I, 6% of regulator, 4% of synergist, 10% 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: 12% of polycarboxylate water reducer, 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 repair material comprises the following steps:

firstly, planing and milling a damaged part of concrete twice, and extending inwards for 150mm along the periphery of the damaged part of the concrete to carry out deepening planing and milling treatment to form a repairing part;

step two, cleaning the planing and milling object of the repairing part, flushing the repairing part by water flow and wetting the repairing part so that the humidity of the repairing part is 80%;

and thirdly, 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 directly coating the mixture on a repairing part.

The remainder was the same as in example 1.

Example 3

The difference with the embodiment 1 is 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 frosting resistant agent prepared in preparation example I, 4% of regulator, 2.5% of synergist, 7% of repairing material prepared in preparation example 1 and the balance of silicon dioxide;

the remainder was the same as in example 1.

Example 4

The difference from example 3 is that the synergist comprises magnesium aluminium silicate and triethanolamine oleate in a mass ratio of 0.7:3, the remainder being the same as in example 3.

Example 5

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

Example 6

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

Example 7

The difference from example 5 is that the repair material prepared in preparation 3 was selected, and the remainder was the same as in example 5.

Example 8

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

Example 9

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

Example 10

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

Example 11

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

Example 12

The difference from example 9 is that the anti-sanding material of preparation III was selected, and the rest was the same as in example 9.

Example 13

The difference from example 9 is that the anti-sanding material of preparation four was selected and the rest was the same as example 9.

Comparative example

Comparative example 1

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

Comparative example 2

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

Comparative example 3

The difference from example 12 is that the repair stock is prepared by the following steps: uniformly mixing gelatin, acacia, xanthan gum, sericite powder and ceramic micro powder to prepare a repairing material; the remainder was the same as in example 12.

Comparative example 4

The difference from example 12 is that the abrasion resistant sand is replaced by machine-made sand in equal amounts, the remainder being the same as example 12.

Comparative example 5

The difference from example 12 is that the abrasion resistant sand is made by the following steps: uniformly mixing carbon black micropowder, machine-made sand, rosin glyceride and oxidized polyethylene wax to obtain anti-frosting agent; the remainder was the same as in example 12.

Performance test

The concrete thin layer repairing materials prepared in examples 1 to 13 and comparative examples 1 to 5 were measured for compressive strength of 7h, 1d and 28d and adhesive strength according to GB/T25181-2019 premixed mortar; the abrasion loss is measured according to JTG E30-2005 method for testing abrasion resistance of Cement concrete; the results are recorded in table 2.

TABLE 2

By combining examples 1-13 and combining Table 2, it can be seen that 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 meanwhile, the concrete thin layer repairing material has good later-stage compressive strength increase; the wear-resistant pavement has excellent wear resistance and bonding strength, the bonding strength of new and old pavement is good, the repaired pavement can endure the friction of vehicles and pedestrians, and the wear resistance is excellent.

As can be seen from the combination of example 12 and comparative examples 1 to 2 and the combination of Table 2, in comparative example 1, the setting and hardening speed of the conventional Portland cement are low, the early strength is low, the road repairing period is long, and when the repairing material prepared in comparative example 1 is used for repairing the road, the road is required to be closed, the traffic is interrupted, the traffic is seriously influenced, and the traffic pressure is increased. In the comparative example 2, although the early-strength calcareous material is added, the synergistic agent is not added for synergistic treatment, and the early-strength of the repairing material prepared in the comparative example 2 is better than that of the repairing material prepared in the comparative example 1, but the later-stage compressive strength is not greatly and obviously increased, so that the synergistic treatment of the early-strength calcareous material by adopting the synergistic agent under a certain condition can ensure the early-strength of the repairing material, and the synergistic-treated early-strength calcareous material and the regulator are compounded, so that the repairing material not only has excellent early-strength performance, but also has good later-stage compressive strength increase, and the repairing effect on the pavement is obviously improved.

As can be seen by combining example 12 and comparative example 3 and combining table 2, comparative example 3 only mixes the raw material components of the repairing material uniformly, the prepared repairing material has poor compressive strength in the whole age, and the adhesion and wear resistance of new and old road surfaces are also poor, and cracks, flaking, exposed bones or holes and other phenomena are easy to occur again in a short time; the hydrophilic colloid is solidified 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 play a good repairing effect, and the wear resistance of the concrete pavement can be effectively improved, so that the repaired pavement can be subjected to the 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.

As can be seen from the combination of example 12 and comparative examples 4 to 5 and the combination of Table 2, the compressive strength of the repair material prepared by using the conventional machine-made sand in comparative example 4 is reduced, the abrasion amount is obviously increased, and the abrasion resistance is obviously reduced, while the composite performance of the repair material prepared by simply and uniformly mixing the raw material components in the abrasion resistance of comparative example 5 is slightly better than that of comparative example 4, but the composite performance of the repair material still cannot be effectively improved. The rosin glyceride can form excellent binding force when being sprayed and burned, so that the carbon black micro powder can be adhered to the surface of machine-made sand, and under the action of an auxiliary agent, the binding force between the rosin glyceride and a repairing material and between the rosin glyceride and an old pavement can be effectively promoted, a concrete structure with a compact internal structure can be formed, and the wear resistance of the concrete can be improved by cooperation with the repairing material. Therefore, only by adopting the specific preparation method, the anti-frosting effect on the pavement can be obviously improved by matching with other raw material components.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims (9)

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 calcareous material, 7-15% of wear-resistant sand, 2-6% of regulator, 1-4% of synergistic agent, 4-10% of repairing material and the balance of silicon dioxide;

the early strength calcareous 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 taking the repairing material as a reference;

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

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

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

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

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

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

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

6. The concrete thin 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): 4-7): 0.4-0.9): 0.2-0.7.

7. The thin-layer concrete 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. A method for preparing a thin-layer concrete repair material according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:

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

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

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

firstly, planing and milling a damaged part of concrete at least twice, and extending inwards for 140-160mm along the periphery of the damaged part of the concrete to carry out deepening planing and milling treatment to form a repairing part;

step two, cleaning the planing and milling object of the repairing part, flushing the repairing part by water flow and wetting the repairing part so that the humidity of the repairing part is 70-85%;

and thirdly, fully and uniformly stirring the concrete thin layer repairing material prepared by any one of claims 1-8 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.