CN112047693A

CN112047693A - RPC cover plate for road and preparation method thereof

Info

Publication number: CN112047693A
Application number: CN202010962456.1A
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: 2020-12-08
Anticipated expiration: 2040-09-14
Also published as: CN112047693B

Abstract

The invention relates to an RPC cover plate for a road, which is prepared from the following raw materials in parts by weight: 100 parts of cement, 150 parts of quartz sand, 300 parts of mineral admixture, 20-30 parts of steel fiber, 5-15 parts of aramid fiber, 6-12 parts of adhesion promoting and toughening powder, 1-5 parts of water reducing agent and 25-36 parts of water; the adhesion promoting and toughening powder is prepared from the following raw materials in parts by weight: 80-100 parts of thermoplastic elastomer, 10-30 parts of organic fluororesin, 5-15 parts of modified rice hull ash, 1-5 parts of expandable graphite, 2-4 parts of compatilizer, 1-3 parts of calcium stearate, 0.1-1 part of organic peroxide and 70-80 parts of paraffin oil. Compared with the prior art, the RPC cover plate has the characteristics of good abrasion resistance and corrosion resistance, high strength, good toughness, long service life and good volume stability.

Description

RPC cover plate for road and preparation method thereof

Technical Field

The invention belongs to the technical field of concrete materials, and relates to an RPC cover plate for a road and a preparation method thereof.

Background

As is well known, RPC, i.e., reactive powder concrete, is a cement-based material that is developed by using conventional cement and other materials in the middle of the 90 s after high-strength and high-performance concrete, and is a high-performance concrete compounded by a DSP material and a fiber-reinforced material. The RPC material can prolong the service life of the structure, greatly reduce the maintenance cost and reduce the comprehensive cost of engineering construction and use. Therefore, the RPC material is widely applied to house construction, bridge engineering, military facilities and the like at present, and has a wide application prospect.

However, although the PRC cover plate for road used in practice at present has high strength and high stability, it is relatively brittle and is not good for resisting impact load and bearing vibration, i.e. when the RPC cover plate is impacted, it is easy to be damaged, which is also the main reason why the RPC cover plate is generally cracked at present.

Disclosure of Invention

One object of the present invention is to overcome the above-mentioned drawbacks of the prior art and to provide an RPC cover plate for roads, which has good wear resistance and corrosion resistance, high strength, good toughness, long service life and good volume stability.

The invention also aims to provide a preparation method of the RPC cover plate for the road.

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

according to one aspect of the invention, the RPC cover plate for the road is prepared from the following raw materials in parts by weight: 100 parts of cement, 150 parts of quartz sand, 300 parts of mineral admixture, 20-30 parts of steel fiber, 5-15 parts of aramid fiber, 6-12 parts of adhesion-promoting and toughening powder, 1-5 parts of water reducer and 25-36 parts of water.

As a preferable technical scheme, the cement is 52.5-grade ordinary portland cement, the particle size of the quartz sand is less than or equal to 2mm, and SiO is adopted₂The content is more than or equal to 98 percent, the mud content is less than or equal to 0.5 percent, 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 technical scheme, the adhesion promoting and toughening powder material is prepared from the following raw materials in parts by weight: 80-100 parts of thermoplastic elastomer, 10-30 parts of organic fluororesin, 5-15 parts of modified rice hull ash, 1-5 parts of expandable graphite, 2-4 parts of compatilizer, 1-3 parts of calcium stearate, 0.1-1 part of organic peroxide and 70-80 parts of paraffin oil.

Further, 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 further preferable technical solution, the relationship between the amount of the rice hull ash powder and the absolute ethyl alcohol in the step 2 is as follows: 5-10 g of rice hull ash powder is added to each 100 mL of absolute ethyl alcohol.

As a further preferable technical scheme, 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.

Further, the silane coupling agent may be selected from one of commercially available KH-550, KH-560 or KH-570.

As a preferable technical scheme, the thermoplastic elastomer is one or two selected from styrene-ethylene-propylene-styrene block copolymer or ethylene-octene copolymer, and the organic fluorine resin is one selected from hexafluorobutyl acrylate, hexafluoroisopropyl acrylate or hexafluoroisopropyl methacrylate.

As a preferable technical scheme, the compatilizer is one selected from acrylic acid-acrylamide copolymer or styrene-acrylamide copolymer, the organic peroxide is one or more selected from 1, 3-dibutyl peroxyisopropylbenzene, tert-butyl peroxybenzoate or dibenzoyl peroxide, the carbon content of the expandable graphite is more than or equal to 97 percent, the expansion volume is 180-250mL/g, and the particle size is 0.1-0.2 mm.

As a preferred technical scheme, the preparation method of the adhesion-promoting toughening powder material comprises the following steps: mixing thermoplastic elastomer and paraffin oil according to parts by weight, standing for 24 hours to fully swell the thermoplastic elastomer, adding the swollen thermoplastic elastomer on an open plasticator with a double-roller temperature of 160-170 ℃, adding organic fluororesin and a compatilizer according to parts by weight for mixing, after plasticizing uniformly, adding organic peroxide and calcium stearate according to parts by weight for mixing for 10 minutes, adding modified rice hull ash and expandable graphite according to parts by weight, continuously mixing for 20 minutes, taking out slices after mixing uniformly, carrying out hot pressing at 180 ℃, cold pressing at room temperature to obtain slices, dehumidifying, granulating and drying to obtain the adhesion-promoting and toughening powder material.

As a preferred technical scheme, the steel fiber is a straight copper-plated micro-wire steel fiber with the tensile strength of more than or equal to 3000MPa, the length of the steel fiber is 5-10mm, and the diameter of the steel fiber is 0.1-0.2 mm.

As a preferable technical scheme, the length of the aramid fiber is 6-12 mm.

As a preferred technical scheme, the water reducing agent is a polycarboxylic acid water reducing agent.

According to another aspect of the present invention, there is provided a method of preparing an RPC decking for a roadway, the method comprising the steps of:

(1) adding cement, quartz sand, mineral admixture, steel fiber, aramid fiber, adhesion promoting and toughening powder, a composite water reducing agent and water into a stirrer according to the parts by weight, and uniformly stirring and mixing to obtain concrete slurry;

(2) placing the finished mould on a vibration table, opening the vibration table, pouring the stirred concrete slurry into the mould until the mould is completely formed, and thus obtaining the initially-formed RPC cover plate;

(3) and (3) placing the preliminarily molded RPC cover plate into a curing chamber for curing to obtain an initially solidified RPC cover plate, separating the initially solidified RPC cover plate from the mold to obtain a demolded RPC cover plate, and then sending the demolded RPC cover plate into the curing chamber for steam curing at the curing temperature of 75-80 ℃ for 2 days.

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

1) in the adhesion promoting and toughening powder adopted by the raw material components of the RPC cover plate, the thermoplastic elastomer is used as a base material, the organic fluororesin is introduced, and the acrylic acid-acrylamide copolymer or the styrene-acrylamide copolymer is used as a compatilizer, so that the interface acting force of the organic fluororesin and the thermoplastic elastomer can be effectively improved, the compatibility of the organic fluororesin and the thermoplastic elastomer is improved, and the weather resistance, hydrolysis resistance, heat resistance and corrosion resistance of the adhesion promoting and toughening powder are effectively improved on the premise of ensuring that the final adhesion promoting and toughening powder has good flexibility;

2) modified rice hull ash and expandable graphite are introduced into the adopted adhesion promoting and toughening powder, and the modified rice hull ash is obtained by modifying the surface of the rice hull ash by adopting a silane coupling agent, so that the rice hull ash modified by the silane coupling agent can form stronger interaction with a base material on one hand, the compatibility of the rice hull ash and the base material is improved, and the modified rice hull ash can also play a role in promoting the capacity, namely the modified rice hull ash is used as an intermediate to be beneficial to improving the dispersibility of the expandable graphite in the base material and the compatibility of the expandable graphite and the base material, and the modified rice hull ash and the expandable graphite can play a role in synergy, so that the heat resistance of the final adhesion promoting and toughening powder is improved;

3) the adhesion promoting and toughening powder is introduced into the material system, so that the toughness of the RPC cover plate can be effectively improved, the adhesion promoting and toughening powder is doped in cement and quartz sand, vibration energy can be consumed, the vibration amplitude is reduced, the vibration energy can be absorbed when the RPC cover plate is impacted, the dynamic response amplitude of the structure is reduced, and the problem that the conventional RPC cover plate is easily subjected to brittle damage due to high brittleness can be effectively solved;

4) the mineral admixture is introduced into the material system, the mineral admixture, the cement and the quartz sand can jointly exert high-efficiency bonding performance, the economic cost is reduced, and the strength of the final RPC cover plate can be effectively improved due to the use of the steel fiber and the aramid fiber.

Detailed Description

The inventor has found through extensive and intensive research that the toughness of the RPC cover plate can be effectively improved by introducing the adhesion promoting and toughening powder into the raw material components of the RPC cover plate, and the problem that the conventional RPC cover plate is easily subjected to brittle damage due to large brittleness of the RPC cover plate can be effectively solved, the adhesion promoting and toughening powder uses the thermoplastic elastomer as a base material, introduces the organic fluororesin and uses the acrylic acid-acrylamide copolymer or the styrene-acrylamide copolymer as a compatilizer, so that the interface acting force between the organic fluororesin and the thermoplastic elastomer can be effectively improved, the compatibility between the organic fluororesin and the thermoplastic elastomer is improved, the weather resistance, the hydrolysis resistance, the heat resistance and the corrosion resistance of the adhesion promoting and toughening powder are effectively improved on the premise of ensuring that the final adhesion promoting and toughening powder has good flexibility, the prepared RPC cover plate has good abrasion resistance, good corrosion resistance and high strength, good toughness, long service life and good volume stability.

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 RPC cover plates of examples 1 to 5 and comparative example.

TABLE 1 formulation of raw ingredients for RPC cover plates of examples 1-5 and comparative examples

The cement used in examples 1 to 5 and comparative example in Table 1 was a Portland cement of grade 52.5, the quartz sand used had a particle size of 2mm or less, and SiO₂The content is more than or equal to 98 percent, the mud content is less than or equal to 0.5 percent, and the adopted water reducing agent is a polycarboxylic acid water reducing agent.

The mineral admixtures used in examples 1 and 2 of Table 1 had specific surface areas of 2000m or more²(ii) silica fume per kg; the mineral admixture adopted in the embodiment 3 and the comparative example 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; the mineral admixture used in example 5 has a specific surface area of 2000m or more²/kg of ultrafine metakaolin.

The steel fibers used in examples 1 and 2 in Table 1 were straight copper-plated micro-wire steel fibers having a tensile strength of not less than 3000MPa, a length of 10mm and a diameter of 0.2 mm; the length of the aramid fiber used is 12 mm.

The steel fibers used in example 3 and the comparative example in Table 1 were straight copper-plated micro-wire steel fibers having a tensile strength of not less than 3000MPa, a length of 8mm and a diameter of 0.1 mm; the length of the aramid fiber is 10 mm.

The steel fibers used in examples 4 and 5 in Table 1 were straight copper-plated micro-wire steel fibers having a tensile strength of not less than 3000MPa, a length of 5mm and a diameter of 0.1 mm; the length of the adopted aramid fiber is 6 mm.

The following table 2 shows the formulations of the adhesion-promoting toughening powder used in examples 1 to 5.

TABLE 2 formulation of adhesion promoting and toughening powders used in examples 1-5

In table 2, the thermoplastic elastomer used in examples 1 and 5 was an ethylene-octene copolymer, the thermoplastic elastomer used in examples 2 and 4 was a styrene-ethylene-propylene-styrene block copolymer, and the thermoplastic elastomer used in example 3 was a mixture of a styrene-ethylene-propylene-styrene block copolymer and an ethylene-octene copolymer at a mass ratio of 4: 1.

In table 2, the organic fluororesin used in example 1 was hexafluorobutyl acrylate, the organic fluororesin used in examples 2 to 4 was hexafluoroisopropyl methacrylate, and the organic fluororesin used in example 5 was hexafluoroisopropyl acrylate.

In table 2, the compatibilizer used in examples 1 to 4 was a styrene-acrylamide copolymer, and the compatibilizer used in example 5 was an acrylic acid-acrylamide copolymer.

In Table 2, the organic peroxide used in examples 1 to 2 was t-butyl peroxybenzoate, the organic peroxide used in examples 3 to 4 was 1, 3-dibutylperoxyisopropyl benzene, and the organic peroxide used in example 5 was dibenzoyl peroxide.

In Table 2, the expandable graphite used in examples 1 to 2 had a carbon content of 97% or more, an expansion volume of 250mL/g and a particle diameter of 0.2 mm; the carbon content of the expandable graphite used in example 3 was not less than 97%, the expansion volume was 180mL/g, and the particle size was 0.1 mm; the expandable graphite used in examples 4 to 5 had a carbon content of 97% or more, an expansion volume of 200mL/g and a particle size of 0.2 mm.

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 KH-550 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 modified rice hull ash used in examples 3-4 was prepared 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-560 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 example 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 KH-570 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 preparation method of the adhesion promoting and toughening powder used in examples 1 to 5 was as follows:

step i): mixing the thermoplastic elastomer and paraffin oil according to the weight part, and standing for 24 hours to fully swell the thermoplastic elastomer;

step ii): adding the swollen thermoplastic elastomer on an open plasticator with a double-roller temperature of 160-170 ℃, adding organic fluororesin and compatilizer according to parts by weight for mixing, after plasticizing uniformly, adding organic peroxide and calcium stearate according to parts by weight for mixing for 10 minutes, adding modified rice hull ash and expandable graphite according to parts by weight, continuing mixing for 20 minutes, discharging sheets after mixing uniformly, carrying out hot pressing at 180 ℃, then cold pressing at room temperature for discharging sheets, and then dehumidifying, granulating and drying to obtain the adhesion promoting and toughening powder.

In step ii) above, example 1 was set to 160 ℃, example 2 was set to 170 ℃, example 3 was set to 166 ℃ and examples 4 and 5 were both set to 162 ℃ for the two roll temperature of the open mill.

The materials of examples 1-5 were made into RPC cover plates using the following method:

Comparative example an RPC cover plate was made using the same procedure as described above.

The following table 3 shows the performance test results of the RPC cover plates manufactured using the raw material component formulations of examples 1-5 and comparative example.

TABLE 3 Performance test results of RPC cover sheets made from the stock component formulations of examples 1-5 and comparative example

The analysis of the test results in table 3 shows that, compared with example 3, the raw materials of the comparative example do not contain the adhesion promotion toughening powder, and the fracture toughness, the compressive strength, the flexural strength and the elastic modulus are all obviously lower than those of example 3, which indicates that the mechanical properties of the final RPC cover plate can be effectively improved by introducing a proper amount of adhesion promotion toughening powder into the raw material components, and the RPC cover plate can have high fracture toughness, high compressive strength and high flexural strength. Under the same experimental conditions, the wear coefficient and the freeze-thaw shedding quality of the embodiment 3 are obviously smaller than those of the comparative example, which shows that the RPC cover plate of the invention has excellent wear resistance, good frost resistance, small sensitivity to temperature, good volume stability and small degree of self expansion and contraction under different temperature working conditions, thereby greatly prolonging the service life of the RPC cover plate.

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 to these embodiments may be made, 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 RPC cover plate for the road is characterized by being prepared from the following raw materials in parts by weight: 100 parts of cement, 150 parts of quartz sand, 300 parts of mineral admixture, 20-30 parts of steel fiber, 5-15 parts of aramid fiber, 6-12 parts of adhesion-promoting and toughening powder, 1-5 parts of water reducer and 25-36 parts of water.

2. The RPC cover plate for roads of claim 1, wherein the cement is a 52.5-grade ordinary portland cement, the particle size of the quartz sand is less than or equal to 2mm, and SiO is₂The content is more than or equal to 98 percent, the mud content is less than or equal to 0.5 percent, 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。

3. The RPC cover plate for the road of claim 1, wherein the adhesion promoting and toughening powder material is prepared from the following raw materials in parts by weight: 80-100 parts of thermoplastic elastomer, 10-30 parts of organic fluororesin, 5-15 parts of modified rice hull ash, 1-5 parts of expandable graphite, 2-4 parts of compatilizer, 1-3 parts of calcium stearate, 0.1-1 part of organic peroxide and 70-80 parts of paraffin oil.

4. The RPC cover plate for roads of claim 3, wherein the modified rice hull ash is prepared by the following method:

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

5. The RPC cover plate for roads of claim 4, wherein the relationship between the amount of the rice hull ash powder and the absolute ethyl alcohol in step 2 is: 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.

6. The RPC cover sheet for roads of claim 3, wherein the thermoplastic elastomer is selected from one or two of styrene-ethylene-propylene-styrene block copolymer or ethylene-octene copolymer, and the organic fluorine resin is selected from one of hexafluorobutyl acrylate, hexafluoroisopropyl acrylate or hexafluoroisopropyl methacrylate.

7. The RPC decking for roads as claimed in claim 3, wherein the compatibilizer is one selected from acrylic acid-acrylamide copolymer or styrene-acrylamide copolymer, the organic peroxide is one or more selected from 1, 3-dibutyl peroxycumene, tert-butyl peroxybenzoate or dibenzoyl peroxide, and the expandable graphite has a carbon content of 97% or more and a particle size of 0.1-0.2 mm.

8. The RPC cover plate for the road of claim 3, wherein the preparation method of the adhesion promoting and toughening powder material comprises the following steps: mixing thermoplastic elastomer and paraffin oil according to parts by weight, standing for 24 hours to fully swell the thermoplastic elastomer, adding the swollen thermoplastic elastomer on an open plasticator with a double-roller temperature of 160-170 ℃, adding organic fluororesin and a compatilizer according to parts by weight for mixing, after plasticizing uniformly, adding organic peroxide and calcium stearate according to parts by weight for mixing for 10 minutes, adding modified rice hull ash and expandable graphite according to parts by weight, continuously mixing for 20 minutes, taking out slices after mixing uniformly, carrying out hot pressing at 180 ℃, cold pressing at room temperature to obtain slices, dehumidifying, granulating and drying to obtain the adhesion-promoting and toughening powder material.

9. The RPC cover plate for the road of claim 1, wherein the steel fiber is a flat copper-plated micro-wire steel fiber with a tensile strength of not less than 3000MPa, the aramid fiber has a length of 6-12mm, and the water reducing agent is a polycarboxylic acid water reducing agent.

10. A method of producing an RPC cover plate for roads as claimed in any of the claims 1 to 9, comprising the steps of: