CN112028576A

CN112028576A - Rapid repair material suitable for UHPC roads and bridges

Info

Publication number: CN112028576A
Application number: CN202010963617.9A
Authority: CN
Inventors: 容七英
Original assignee: Jiangxi Longzheng Technology Development Co Ltd
Current assignee: Jiangxi Longzheng Technology Development Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-12-04
Anticipated expiration: 2040-09-14
Also published as: CN112028576B

Abstract

The invention relates to a rapid repair material suitable for UHPC roads and bridges, which is prepared from the following raw materials in parts by weight: 100 parts of inorganic gelled powder, 40-80 parts of mineral admixture, 10-30 parts of functional dense material, 10-15 parts of modified rice hull ash, 100 parts of sand, 12-20 parts of steel fiber and 50-90 parts of water. In the material system, under the mixed system of inorganic gelled powder, mineral admixture and sand, the synergistic effect of the functionally dense material, the steel fiber and the modified rice hull ash is utilized, so that the material system has good compressive strength, flexural strength, toughness and wear resistance, the volume stability of the material can be effectively maintained, the shrinkage of the material is reduced, the crack resistance of the material is improved, the setting and curing time is short, the setting time can be adjusted according to needs, the strength after setting develops quickly, and the material system is suitable for quick repair.

Description

Rapid repair material suitable for UHPC roads and bridges

Technical Field

The invention belongs to the technical field of building materials, relates to a concrete repair material, and particularly relates to a rapid repair material suitable for UHPC roads and bridges.

Background

It is known that Ultra-High Performance Concrete (UHPC) is a new cement-based material, the most important features of which are Ultra-High compressive strength (> 150 MPa) and Ultra-low permeability. Due to its excellent properties, ultra-high performance concrete has been widely used in high-rise/ultra-high-rise buildings, large-span bridges, viaducts, overpasses, harbor airports and other construction projects. In general, a structure constructed by using ultra-high performance concrete is often affected by various complex environmental factors during service, such as physical, chemical or biological erosion action of the atmosphere, water and the like, contraction and expansion action caused by temperature and humidity changes, and various dynamic and static loads, so that the concrete is cracked, falls off, leaked and corroded to damage under the action of the factors accumulated in the day and the month over time, the bearing capacity and the anti-permeability performance of the concrete structure are greatly affected, and a huge potential safety hazard is caused. Therefore, for damaged concrete structures, rapid reinforcement and maintenance are often required to ensure the continuous, safe and effective operation of the construction project.

Disclosure of Invention

The invention aims to provide a rapid repair material for UHPC roads and bridges, which has the advantages of short setting and curing time, high strength, good volume stability, no shrinkage and excellent durability.

The purpose of the invention can be realized by the following technical scheme:

the material is suitable for rapid repair of UHPC roads and bridges and is prepared from the following raw materials in parts by weight: 100 parts of inorganic gelled powder, 40-80 parts of mineral admixture, 10-30 parts of functional dense material, 10-15 parts of modified rice hull ash, 100 parts of sand, 12-20 parts of steel fiber and 50-90 parts of water.

As a preferred embodiment, the inorganic cementitious powder is Portland cement with a strength grade of 52.5 or 52.5R.

As a preferred embodiment, the mineral admixture comprises at least one of silica fume, blast furnace slag powder and superfine metakaolin, and the specific surface area of the mineral admixture is more than or equal to 2000m²/kg。

As a preferred embodiment, the functionally dense material is thermoplastic elastomer particles modified with epoxy resin, the thermoplastic elastomer particles having a particle size of not more than 200 μm.

The preparation method of the functional dense material comprises the following steps: and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at the temperature of 180-190 ℃, then cooling to the temperature of 130-150 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 2-4 hours, and naturally cooling to room temperature to obtain the functional dense material.

As a preferred embodiment, the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:1-5, the compatilizer is 5-20% of the total mass of the thermoplastic elastomer and the epoxy resin, the coupling agent is 0.5-1.2% of the total mass of the thermoplastic elastomer and the epoxy resin, and the montmorillonite is 1-5% of the total mass of the thermoplastic elastomer and the epoxy resin.

As a preferred embodiment, the thermoplastic elastomer is selected from polyamide-based thermoplastic elastomers, for example, one selected from TPAE-12, TPAE-38 and TPAE-10 commercially available from T & K TOKA.

As a preferred embodiment, the epoxy resin is selected from one of bisphenol a epoxy resin or novolac epoxy resin, the compatibilizer is selected from one of acrylic acid-acrylamide copolymer or styrene-acrylamide copolymer, and the coupling agent is one of hexamethylene diisocyanate or toluene diisocyanate.

The preparation method of the modified rice hull ash comprises the following steps:

step 1: incinerating the rice hulls at the temperature of 700-;

step 2: uniformly mixing the rice hull ash powder with absolute ethyl alcohol to prepare a mixed solution of the rice hull ash powder and the absolute ethyl alcohol;

and step 3: adding hydroxymethyl cellulose, a silane coupling agent and calcium sulfate whiskers into the mixed solution, adjusting the pH value of the solution to 5 by using dilute nitric acid, reacting for 4-6 hours at 85 ℃, cooling, filtering, washing, drying to constant weight, grinding, and sieving with a 650-mesh sieve to obtain the modified rice hull ash.

As a preferred embodiment, the rice hull ash powder and the absolute ethyl alcohol in step 2 are used in the following relationship: adding 5-10 g of rice hull ash powder into every 100 mL of absolute ethyl alcohol;

in the step 3, the dosage of the hydroxymethyl cellulose is 2-8% of the mass of the rice hull ash powder, the dosage of the silane coupling agent is 0.5-1.2% of the mass of the rice hull ash powder, and the dosage of the calcium sulfate whisker is 1-3% of the mass of the rice hull ash powder.

As a further preferred embodiment, the silane coupling agent may be selected from commercially available KH-570, A-174 or Z-6030.

In a preferred embodiment, the steel fiber is a flat copper-plated micro-wire steel fiber with the tensile strength of more than or equal to 3000 MPa.

As a further preferred embodiment, the steel fibres have a length of 5-10mm and a diameter of 0.1-0.2 mm.

As a preferred embodiment, the sand comprises at least one of natural river sand, washed sand or quartz sand, and the particle size of the sand is not more than 2 mm.

According to the invention, the preparation method of the material suitable for UHPC road bridge rapid repair comprises the following steps:

I) the method comprises the following steps Uniformly mixing inorganic gelled powder, mineral admixture and sand according to the weight part to prepare first premix;

II): uniformly mixing the functional dense material, the steel fiber and the modified rice hull ash with water accounting for 40-60% of the total weight of the water in parts by weight to prepare a second premix;

III): and mixing the first premix and the second premix, and adding the rest part by weight of water while stirring until the mixture is uniformly stirred.

Compared with the prior art, the invention has the following characteristics:

1) according to the invention, the functional dense material, the steel fiber and the modified rice husk ash are introduced into the mixed system of the inorganic gelled powder, the mineral admixture and the sand, so that the strength of the concrete is improved, the steel fiber can be rapidly and uniformly dispersed in the concrete to form a multidirectional supporting system, and the directional stress in the concrete is dispersed, and in addition, under the synergistic effect of the modified rice husk ash and the functional dense material, the crack generated in the hydration process due to the volume shrinkage of the concrete can be effectively prevented or inhibited, the generation of the crack is rapidly eliminated or reduced, and the toughness of the concrete is further improved;

2) the modified rice hull ash used in the material system is obtained by modifying the surface of the rice hull ash by adopting the silane coupling agent, which is not only favorable for forming stronger interaction with a concrete substrate and improving the compatibility of the modified rice hull ash with the concrete substrate, but also favorable for improving the interface stability of the functional dense material and the concrete substrate, and can effectively improve the dispersibility of the functional dense material in the concrete substrate, because the functional dense material is thermoplastic elastomer particles modified by adopting epoxy resin, the functional dense material has excellent flexibility, the toughness of the material system can be improved by dispersing the functional dense material in the concrete substrate, the instant pressure born by the concrete substrate can be greatly slowed down and absorbed, the flexural strength of the material system can be obviously improved, in addition, after the thermoplastic elastomer particles are modified by the epoxy resin, the bonding strength between the surface of the thermoplastic elastomer particles and the concrete substrate can be greatly improved, the mineral admixture can play a role in synergy, and the viscosity of the system is enhanced together, so that the bonding strength between the steel fiber and the concrete is enhanced, the material system has strong hardness, the material system has excellent wear resistance, and the service life of the final material system is prolonged;

3) in the material system, under the mixed system of inorganic gelled powder, mineral admixture and sand, the synergistic effect of the functional dense material, steel fiber and modified rice hull ash is utilized, so that the volume stability of the material is favorably maintained, the contractibility of the material is reduced, the crack resistance of the material is further improved, the material has short setting and curing time, the setting time can be adjusted according to needs, the strength after setting develops quickly, and the material is suitable for quick repair.

Detailed Description

The inventor of the present invention has made extensive and intensive studies and found that a functionally dense material, steel fibers and modified rice husk ash are introduced into a concrete repair material based on inorganic cementitious powder, mineral admixture and sand, the interface stability between the functionally dense material and a concrete substrate is improved by modifying the rice husk ash, so as to improve the dispersibility of the functionally dense material in the concrete substrate, the functionally dense material is thermoplastic elastomer particles modified by epoxy resin, and the functionally dense material itself has excellent flexibility, and the dispersion thereof in the concrete substrate can improve the toughness of a material system and can significantly improve the flexural strength of the material system, and after the thermoplastic elastomer particles are modified by epoxy resin, the surface of the thermoplastic elastomer particles has significantly improved bonding strength with the concrete substrate, and the thermoplastic elastomer particles and the mineral admixture can exert a synergistic effect to jointly enhance the viscosity of the system, which is also beneficial to enhance the bonding strength between the steel fibers and the concrete, the material system has strong hardness and excellent wear resistance; the functionally dense material, the steel fiber and the modified rice hull ash can play a role in synergy, so that the volume stability of the material is favorably maintained, the contractibility of the material is reduced, and the crack resistance of the material is further improved.

On the basis of this, the present invention has been completed.

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed embodiment and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein. As used herein, the term "about" when used to modify a numerical value means within + -5% of the error margin measured for that value.

The technical scheme of the invention is further illustrated by the following specific examples, and the raw materials used in the invention are all commercial products unless otherwise specified.

The following table 1 shows the raw material components and the weight part contents of the repair materials of examples 1 to 5 and comparative examples 1 to 3.

TABLE 1 formulation of raw Material Components for repair materials of examples 1-5 and comparative examples 1-3

Note: in comparative example 1 of Table 1, "/" indicates that the raw material does not contain modified rice hull ash;

in comparative example 2 of Table 1, "/" indicates that the starting material does not contain a functionally dense material;

comparative example 3 in table 1 indicates that 18 parts of TPAE-12 and 12 parts of rice hull ash were used instead of the functionally dense material and the modified rice hull ash, respectively.

In Table 1, the inorganic cementitious powders used in examples 1-2 are Portland cement with a strength grade of 52.5; the inorganic cementitious powders used in examples 3-5 and comparative examples 1-3 were portland cements having a strength grade of 52.5R.

In Table 1, the mineral admixtures used in examples 1-2 had specific surface areas of 2000m or more²/kg of ultrafine metakaolin; the mineral admixture used in the example 3 and the comparative examples 1 to 3 is formed by mixing silica fume, blast furnace slag powder and superfine metakaolin according to the mass ratio of 1:3:1, and the specific surface area is more than or equal to 2000m²Per kg; example 4 the mineral admixture used was a mineral admixture having a specific surface area of 2000m or more²/kg of blast furnace slag powder; example 5 the mineral admixture used was a mineral admixture having a specific surface area of 2000m or more²Silica fume per kg.

In Table 1, the steel fibers used in examples 1 to 5 and comparative examples 1 to 3 were flat copper-plated micro-wire steel fibers having a tensile strength of 3000MPa or more, wherein the steel fibers in examples 1 to 2 had a length of 5mm and a diameter of 0.1mm, the steel fibers in examples 3 and comparative examples 1 to 3 had a length of 8mm and a diameter of 0.2mm, and the steel fibers in examples 4 to 5 had a length of 10mm and a diameter of 0.1 mm.

In Table 1, the sands used in examples 1 to 2 were natural river sands having a grain size of not more than 2mm, the sands used in example 3 and comparative examples 1 to 3 were quartz sands having a grain size of not more than 2mm, and the sands used in examples 4 to 5 were water washed sands having a grain size of not more than 2 mm.

In Table 1, examples 1 to 5 and comparative example 1 used the functionally dense material which is thermoplastic elastomer particles modified with epoxy resin, wherein the particle diameter of the thermoplastic elastomer particles is not more than 200. mu.m.

The following table 2 shows the kinds of raw material components of the functionally dense materials in examples 1 to 5 and comparative example 1.

TABLE 2 raw material component kinds of the functionally dense materials in examples 1 to 5 and comparative example 1

Item

Inorganic gelled powder

Mineral admixture

Functional dense material

Modified rice hull ash

Sand

Steel fiber

Water (W)

Example 1

100 portions of

40 portions of

10 portions of

100 portions of

12 portions of

50 portions of

Example 2

100 portions of

80 portions

30 portions of

15 portions of

300 portions of

20 portions of

90 portions of

Example 3

100 portions of

62 portions of

18 portions of

12 portions of

160 portions of

15 portions of

53 portions of

Example 4

100 portions of

56 portions of

24 portions of

15 portions of

250 portions of

17 portions of

68 portions of

Example 5

100 portions of

73 parts of

27 portions of

14 portions of

220 portions of

15 portions of

81 portions of

Comparative example 1

100 portions of

62 portions of

18 portions of

/

160 portions of

15 portions of

53 portions of

Comparative example 2

100 portions of

62 portions of

/

12 portions of

160 portions of

15 portions of

53 portions of

Comparative example 3

100 portions of

62 portions of

*

160 portions of

15 portions of

53 portions of

According to table 2, the preparation method of the functionally dense material in example 1 is as follows:

and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at 180 ℃, then cooling to 130 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 4 hours, and naturally cooling to room temperature to obtain the functional dense material.

In the method, the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:1, the addition amount of the compatilizer is 5% of the total mass of the thermoplastic elastomer and the epoxy resin, the addition amount of the coupling agent is 0.5% of the total mass of the thermoplastic elastomer and the epoxy resin, and the addition amount of the montmorillonite is 1% of the total mass of the thermoplastic elastomer and the epoxy resin.

The preparation of the functionally dense material of example 2 is as follows:

and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at 190 ℃, then cooling to 150 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 2 hours, and naturally cooling to room temperature to obtain the functional dense material.

In the method, the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:5, the addition amount of the compatilizer is 20% of the total mass of the thermoplastic elastomer and the epoxy resin, the addition amount of the coupling agent is 1.2% of the total mass of the thermoplastic elastomer and the epoxy resin, and the addition amount of the montmorillonite is 5% of the total mass of the thermoplastic elastomer and the epoxy resin.

The preparation method of the functional dense material in example 3 and comparative example 1 is as follows:

and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at 182 ℃, then cooling to 142 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 4 hours, and naturally cooling to room temperature to obtain the functional dense material.

In the method, the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:2, the addition amount of the compatilizer is 8% of the total mass of the thermoplastic elastomer and the epoxy resin, the addition amount of the coupling agent is 0.7% of the total mass of the thermoplastic elastomer and the epoxy resin, and the addition amount of the montmorillonite is 2% of the total mass of the thermoplastic elastomer and the epoxy resin.

The functional dense materials of examples 4-5 were prepared as follows:

and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at 186 ℃, then cooling to 136 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 3 hours, and naturally cooling to room temperature to obtain the functional dense material.

In the method, the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:4, the addition amount of the compatilizer is 15% of the total mass of the thermoplastic elastomer and the epoxy resin, the addition amount of the coupling agent is 0.9% of the total mass of the thermoplastic elastomer and the epoxy resin, and the addition amount of the montmorillonite is 3% of the total mass of the thermoplastic elastomer and the epoxy resin.

In addition, the modified rice hull ashes used in examples 1 to 5 and comparative example 2 above were prepared as follows:

the modified rice hull ash used in examples 1-2 was prepared as follows:

step 1: incinerating rice hulls at 700 ℃, collecting incineration residues, grinding by using a ball mill, and then sieving by using a 900-mesh sieve to obtain rice hull ash powder;

step 2: uniformly mixing the rice hull ash powder with absolute ethyl alcohol to prepare a mixed solution of the rice hull ash powder and the absolute ethyl alcohol, wherein the dosage relationship of the rice hull ash powder and the absolute ethyl alcohol is as follows: adding 5g of rice hull ash powder into every 100 mL of absolute ethyl alcohol;

and step 3: adding hydroxymethyl cellulose, a silane coupling agent A-174 and calcium sulfate whiskers into the mixed solution, wherein the dosage of the hydroxymethyl cellulose is 8% of the mass of the rice hull ash powder, the dosage of the silane coupling agent KH-550 is 1.2% of the mass of the rice hull ash powder, and the dosage of the calcium sulfate whiskers is 3% of the mass of the rice hull ash powder, then adopting dilute nitric acid to adjust the pH of the solution to 5, reacting for 6 hours at 85 ℃, cooling, filtering, washing, drying to constant weight, and sieving with a 650-mesh sieve after grinding to obtain the rice hull ash.

The preparation method of the modified rice hull ash used in example 3 and comparative example 2 was as follows:

step 1: incinerating rice hulls at 800 ℃, collecting incineration residues, grinding by using a ball mill, and then sieving by using a 900-mesh sieve to obtain rice hull ash powder;

step 2: uniformly mixing the rice hull ash powder with absolute ethyl alcohol to prepare a mixed solution of the rice hull ash powder and the absolute ethyl alcohol, wherein the dosage relationship of the rice hull ash powder and the absolute ethyl alcohol is as follows: adding 10g of rice hull ash powder into every 100 mL of absolute ethyl alcohol;

and step 3: adding hydroxymethyl cellulose, a silane coupling agent KH-570 and calcium sulfate whiskers into the mixed solution, wherein the dosage of the hydroxymethyl cellulose is 5% of the mass of the rice hull ash powder, the dosage of the silane coupling agent KH-550 is 0.8% of the mass of the rice hull ash powder, and the dosage of the calcium sulfate whiskers is 1.3% of the mass of the rice hull ash powder, then adopting dilute nitric acid to adjust the pH of the solution to 5, reacting for 5 hours at 85 ℃, cooling, filtering, washing, drying to constant weight, and sieving with a 650-mesh sieve after grinding.

The modified rice hull ash used in examples 4-5 was prepared as follows:

step 1: incinerating rice hulls at 780 ℃, collecting incineration residues, grinding by using a ball mill, and then sieving by using a 900-mesh sieve to obtain rice hull ash powder;

step 2: uniformly mixing the rice hull ash powder with absolute ethyl alcohol to prepare a mixed solution of the rice hull ash powder and the absolute ethyl alcohol, wherein the dosage relationship of the rice hull ash powder and the absolute ethyl alcohol is as follows: adding 7g of rice hull ash powder into every 100 mL of absolute ethyl alcohol;

and step 3: adding hydroxymethyl cellulose, a silane coupling agent Z-6030 and calcium sulfate whiskers into the mixed solution, wherein the dosage of the hydroxymethyl cellulose is 2% of the mass of the rice hull ash powder, the dosage of the silane coupling agent KH-550 is 0.5% of the mass of the rice hull ash powder, and the dosage of the calcium sulfate whiskers is 1% of the mass of the rice hull ash powder, then adopting dilute nitric acid to adjust the pH of the solution to 5, reacting for 4 hours at 85 ℃, cooling, filtering, washing, drying to constant weight, and sieving with a 650-mesh sieve after grinding to obtain the rice hull ash powder.

The repair materials of examples 1-5 were prepared as follows:

step I): uniformly mixing inorganic gelled powder, mineral admixture and sand according to the weight part to prepare first premix;

step II): uniformly mixing the functional dense material, the steel fiber and the modified rice hull ash with water accounting for 40-60% of the total weight of the water in parts by weight to prepare a second premix;

step III): and mixing the first premix and the second premix, and adding the rest part by weight of water while stirring until the mixture is uniformly stirred.

In the above step II), the example 1-2 is to mix the functional dense material, the steel fiber and the modified rice hull ash uniformly with water in an amount of 40% of the total amount of water to prepare a second premix; example 3 a second premix was prepared by uniformly mixing the functionally dense material, steel fiber and modified rice hull ash with water in an amount of 60% of the total amount of water; examples 4 to 5 were second premixes prepared by uniformly mixing the functionally dense material, the steel fiber and the modified rice hull ash with water in an amount of 50% of the total amount of water.

Comparative examples 1 to 3 repair materials were prepared in substantially the same manner as in example 3.

The properties of the repair materials prepared in examples 1 to 5 and comparative examples 1 to 3 above were tested as follows:

TABLE 3 Performance test results of the materials

。

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications and variations can be made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. The material is suitable for quickly repairing UHPC roads and bridges, and is characterized by being prepared from the following raw materials in parts by weight: 100 parts of inorganic gelled powder, 40-80 parts of mineral admixture, 10-30 parts of functional dense material, 10-15 parts of modified rice hull ash, 100 parts of sand, 12-20 parts of steel fiber and 50-90 parts of water.

2. The material for UHPC road and bridge quick repair according to claim 1, wherein the inorganic cementitious powder is portland cement with a strength grade of 52.5 or 52.5R.

3. The material for UHPC road and bridge rapid repair according to claim 1, wherein the mineral admixture comprises at least one of silica fume, blast furnace slag powder and superfine metakaolin, and the specific surface area of the mineral admixture is more than or equal to 2000m²/kg。

4. The material for UHPC road and bridge quick repair according to claim 1, wherein the functional dense material is thermoplastic elastomer particles modified by epoxy resin, and the particle size of the thermoplastic elastomer particles is not more than 200 μm.

5. The UHPC material for rapidly repairing roads and bridges as claimed in claim 4, wherein the preparation method of the functional dense material comprises the following steps: and (3) uniformly mixing the thermoplastic elastomer, the compatilizer, the coupling agent and the montmorillonite by hot melting at the temperature of 180-190 ℃, then cooling to the temperature of 130-150 ℃ within 20 minutes, adding the epoxy resin, stirring, reacting at constant temperature for 2-4 hours, and naturally cooling to room temperature to obtain the functional dense material.

6. The material for rapidly repairing a UHPC road and bridge as claimed in claim 5, wherein the mass ratio of the thermoplastic elastomer to the epoxy resin is 10:1-5, the compatilizer is 5-20% of the total mass of the thermoplastic elastomer and the epoxy resin, the coupling agent is 0.5-1.2% of the total mass of the thermoplastic elastomer and the epoxy resin, and the montmorillonite is 1-5% of the total mass of the thermoplastic elastomer and the epoxy resin.

7. The material for UHPC road and bridge quick repair according to claim 5, wherein the thermoplastic elastomer is selected from polyamide thermoplastic elastomers, the epoxy resin is selected from one of bisphenol A epoxy resin or novolac epoxy resin, the compatilizer is selected from one of acrylic acid-acrylamide copolymer or styrene-acrylamide copolymer, and the coupling agent is one of hexamethylene diisocyanate or toluene diisocyanate.

8. The material suitable for UHPC road and bridge quick repair according to claim 1, wherein the preparation method of the modified rice hull ash is as follows:

step 1: incinerating the rice hulls at the temperature of 700-;

9. The material for UHPC road and bridge quick repair according to claim 8, wherein the rice hull ash powder and the absolute ethyl alcohol in the step 2 are in the following dosage relation: adding 5-10 g of rice hull ash powder into every 100 mL of absolute ethyl alcohol;

10. The material suitable for UHPC road and bridge rapid repair according to claim 1, wherein the steel fiber is a straight copper-plated micro-wire steel fiber with the tensile strength of more than or equal to 3000 MPa.