1. The reinforced polymer cement concrete is characterized by comprising the following raw materials in parts by weight: 100 parts of cement, 5-15 parts of polyphenylene sulfide emulsion, 1-2 parts of nano silicon dioxide, 4-8 parts of nano kieselguhr, 20-50 parts of coarse aggregate, 5-15 parts of sand powder, 1-2 parts of reinforcing synergist, 1-2 parts of coupling agent, 1-2 parts of naphthalene water reducer, 0.1-1 part of alkyl tin carboxylate, 0.1-1 part of pentaerythritol, 0.1-1 part of anti-permeability synergist, 0.1-0.2 part of dimethyl sulfoxide and 40-80 parts of ethanol water solution.

2. The reinforced polymer cement concrete according to claim 1, characterized in that basalt crushed stone or limestone crushed stone is used as the coarse aggregate, the crushed stone has an average diameter of 4.15-8.64mm, a crushing value of < 14.22%, a wear loss of < 24.65%, a content of needle-shaped particles of < 10.42%, a content of clods of < 0.50%, and a content of stone dust of < 0.32%.

3. The reinforced polymer cement concrete according to claim 1, wherein the fineness modulus of the sand powder is 2.70-2.85 and the stone powder content is < 0.30%.

4. The reinforced polymer cement concrete as claimed in claim 1, wherein the permeation-resistant synergist is at least one of unsaturated polyester resin, epoxy resin, furan resin, phenolic resin, methyl methacrylate, and styrene prepolymer.

5. The reinforced polymer cement concrete according to claim 1, wherein the polyphenylene sulfide emulsion is prepared by the following process: heating water to 60-90 ℃, slowly adding the polyphenylene sulfide resin powder into the water, uniformly stirring, adding the emulsifier, and continuously stirring for 1-2h to obtain the polyphenylene sulfide emulsion.

6. The reinforced polymer cement concrete according to claim 1, wherein the cement is ordinary portland cement, numbered P.O 42.5.5 or more.

7. The reinforced polymer cement concrete according to claim 1, wherein the mass fraction of the aqueous ethanol solution is 40-60%.

8. A method of preparing a reinforced polymer cement concrete according to any one of claims 1 to 7, comprising the steps of:

s1, adding the nano diatomite into the ethanol water solution, stirring, standing for 10-20h, extracting the upper layer suspension, adding dimethyl sulfoxide and nano silicon dioxide, and stirring for 2-4h at 50-70 ℃ to obtain slurry;

s2, adding a coupling agent into the slurry, stirring, adding the polyphenylene sulfide emulsion, and continuously stirring for 2-4h at the temperature of 60-80 ℃ to obtain a premix;

s3, sequentially adding cement, a reinforcing synergist, coarse aggregates, sand powder, a naphthalene water reducer, alkyl tin carboxylate, pentaerythritol, an anti-permeability synergist and water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Background

Concrete is the largest building material in the world, and is mainly formed by mixing a cementing material, coarse and fine aggregates and water, and the concrete is a material with the largest worldwide usage and the widest application range at present because of a series of advantages such as excellent plasticity, good water resistance, excellent durability and extremely competitive economy, and is still one of the most important engineering structure materials in the future.

The surface of the pavement in special areas of some roads (such as bus stations or tunnel pavements) bears repeated actions of transverse force and shear stress, the requirements on the volume stability, the breaking strength and the compressive strength of the pavement are extremely high, the permanent deformation of the surface of the pavement often appears, specifically represented by wave and transition, and further the safety is reduced, so that traffic accidents are caused, casualties and economic losses are caused, the cement concrete pavement is used for replacing the pavement in a conventional method, the use effect of the pavement is seriously influenced, and safety accidents are caused in serious cases.

In recent years, China consumes billions of tons of natural sandstone aggregates every year, the price of the sandstone aggregates is continuously increased due to imbalance of supply and demand relations in partial regions, and meanwhile, the environment is seriously influenced by excessive exploitation and long-distance transportation of the sandstone.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides reinforced polymer cement concrete and a preparation method thereof.

The reinforced polymer cement concrete comprises the following raw materials in parts by weight: 100 parts of cement, 5-15 parts of polyphenylene sulfide emulsion, 1-2 parts of nano silicon dioxide, 4-8 parts of nano kieselguhr, 20-50 parts of coarse aggregate, 5-15 parts of sand powder, 1-2 parts of reinforcing synergist, 1-2 parts of coupling agent, 1-2 parts of naphthalene water reducer, 0.1-1 part of alkyl tin carboxylate, 0.1-1 part of pentaerythritol, 0.1-1 part of anti-permeability synergist, 0.1-0.2 part of dimethyl sulfoxide and 40-80 parts of ethanol water solution.

Preferably, the coarse aggregate is basalt macadam or limestone macadam, the average diameter of the macadam is 4.15-8.64mm, the crushing value is less than 14.22%, the abrasion loss is less than 24.65%, the content of needle-shaped particles is less than 10.42%, the content of mud blocks is less than 0.50%, and the content of stone powder is less than 0.32%.

Preferably, the fineness modulus of the sand powder is 2.70-2.85, and the content of the stone powder is less than 0.30%.

Preferably, the anti-permeability synergist is at least one of unsaturated polyester resin, epoxy resin, furan resin, phenolic resin, methyl methacrylate and styrene prepolymer.

Preferably, the polyphenylene sulfide emulsion is prepared by adopting the following process: heating water to 60-90 ℃, slowly adding the polyphenylene sulfide resin powder into the water, uniformly stirring, adding the emulsifier, and continuously stirring for 1-2h to obtain the polyphenylene sulfide emulsion.

Polyphenylene sulfide is a thermoplastic crystalline polymer with excellent comprehensive properties, and has good fluidity, molding processability, chemical resistance, flame retardancy, rigidity and modulus, high dimensional stability and excellent electrical properties.

Preferably, the cement is ordinary portland cement, numbered P.O 42.5.5 or more.

Preferably, the mass fraction of the ethanol aqueous solution is 40-60%.

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding the nano diatomite into the ethanol water solution, stirring, standing for 10-20h, extracting the upper layer suspension, adding dimethyl sulfoxide and nano silicon dioxide, and stirring for 2-4h at 50-70 ℃ to obtain slurry;

s2, adding a coupling agent into the slurry, stirring, adding the polyphenylene sulfide emulsion, and continuously stirring for 2-4h at the temperature of 60-80 ℃ to obtain a premix;

s3, sequentially adding cement, a reinforcing synergist, coarse aggregates, sand powder, a naphthalene water reducer, alkyl tin carboxylate, pentaerythritol, an anti-permeability synergist and water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

The technical effects of the invention are as follows:

according to the invention, nano diatomite is added into an ethanol water solution to be stirred at a high speed, then dimethyl sulfoxide is adopted to destroy a compact and ordered stacking structure of the diatomite, the structure of the diatomite is promoted to be stripped, nano silicon dioxide fully enters the stripped structure, the formed slurry has excellent stability, and weak bonds in polyphenylene sulfide macromolecules can be shielded by combining the diatomite with the polyphenylene sulfide, so that oxidative crosslinking in a high-temperature environment is avoided, degradation is prevented, and the high-temperature durability of the diatomite is improved; the polyphenylene sulfide composite slurry is added into cement, the grafted structure on the surface of the polyphenylene sulfide has high compatibility with the cement, and after the cement absorbs moisture from the polyphenylene sulfide composite slurry, the polyphenylene sulfide composite slurry can form a continuous organic film in a system, so that the continuity of the organic film can be ensured even if the cement is slowly hardened.

The invention can effectively promote the concrete structure to form a stable and fine structure, not only ensures the volume stability of the concrete, but also enhances the breaking strength, the compressive strength and the breaking-to-compression ratio, obviously improves the toughness while increasing the strength, has stronger wear resistance, and can obtain better durability when being applied to bus stops or tunnel pavements.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Basalt broken stone and/or limestone broken stone are adopted as the coarse aggregate, the average diameter of the broken stone is 4.15-8.64mm, the crushing value is less than 14.22%, the abrasion loss is less than 24.65%, the content of needle-shaped particles is less than 10.42%, the content of mud blocks is less than 0.50%, and the content of stone powder is less than 0.32%.

Example 1

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding 4kg of nano diatomite into 80kg of ethanol water solution with the mass fraction of 40%, stirring, standing for 20h, extracting the upper suspension, adding 0.1kg of dimethyl sulfoxide and 2kg of nano silicon dioxide, and stirring for 4h at 50 ℃ to obtain slurry;

s2, heating 100kg of water to 60 ℃, slowly adding 40kg of polyphenylene sulfide resin powder, uniformly stirring, adding 2kg of emulsifier, and continuously stirring for 2h to obtain polyphenylene sulfide emulsion;

adding 1kg of coupling agent into the slurry, stirring, adding 15kg of polyphenylene sulfide emulsion, and continuously stirring for 4h at 60 ℃ to obtain a premix;

s3, sequentially adding 100kg of 42.5-grade portland cement, 1kg of reinforcing synergist, 50kg of coarse aggregate, 5kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 2kg of naphthalene water reducer, 0.1kg of alkyl tin carboxylate, 1kg of pentaerythritol, 0.1kg of unsaturated polyester resin and 15kg of water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Example 2

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding 8kg of nano diatomite into 40kg of ethanol water solution with the mass fraction of 60%, stirring, standing for 10h, extracting the upper suspension, adding 0.2kg of dimethyl sulfoxide and 1kg of nano silicon dioxide, and stirring for 2h at 70 ℃ to obtain slurry;

s2, heating 100kg of water to 90 ℃, slowly adding 20kg of polyphenylene sulfide resin powder, uniformly stirring, adding 4kg of emulsifier, and continuously stirring for 1h to obtain polyphenylene sulfide emulsion;

adding 2kg of coupling agent into the slurry, stirring, adding 5kg of polyphenylene sulfide emulsion, and continuously stirring for 2h at 80 ℃ to obtain a premix;

s3, sequentially adding 100kg of 42.5-grade portland cement, 2kg of reinforcing synergist, 20kg of coarse aggregate, 15kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 1kg of naphthalene water reducer, 1kg of alkyl tin carboxylate, 0.1kg of pentaerythritol, 1kg of epoxy resin and 5kg of water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Example 3

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding 7kg of nano diatomite into 50kg of ethanol water solution with the mass fraction of 55%, stirring, standing for 12h, extracting the upper suspension, adding 0.17kg of dimethyl sulfoxide and 1.3kg of nano silicon dioxide, and stirring at 65 ℃ for 2.5h to obtain slurry;

s2, heating 100kg of water to 80 ℃, slowly adding 25kg of polyphenylene sulfide resin powder, uniformly stirring, adding 3.5kg of emulsifier, and continuously stirring for 1.3h to obtain polyphenylene sulfide emulsion;

adding 1.8kg of coupling agent into the slurry, stirring, adding 6kg of polyphenylene sulfide emulsion, and continuously stirring for 2.5h at 75 ℃ to obtain a premix;

s3, sequentially adding 100kg of 42.5-grade portland cement, 1.7kg of reinforcing synergist, 30kg of coarse aggregate, 812kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 1.3kg of naphthalene water reducer, 0.8kg of alkyl tin carboxylate, 0.3kg of pentaerythritol, 0.4kg of epoxy resin, 0.4kg of phenolic resin and 8kg of water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Example 4

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding 5kg of nano diatomite into 70kg of ethanol water solution with the mass fraction of 45%, stirring, standing for 18h, extracting the upper suspension, adding 0.13kg of dimethyl sulfoxide and 1.7kg of nano silicon dioxide, and stirring for 3.5h at 55 ℃ to obtain slurry;

s2, heating 100kg of water to 70 ℃, slowly adding 35kg of polyphenylene sulfide resin powder, uniformly stirring, adding 2.5kg of emulsifier, and continuously stirring for 1.7h to obtain polyphenylene sulfide emulsion;

adding 1.2kg of coupling agent into the slurry, stirring, adding 18kg of polyphenylene sulfide emulsion, and continuously stirring for 3.5h at 65 ℃ to obtain a premix;

s3, sequentially adding 100kg of 42.5-grade portland cement, 1.3kg of reinforcing synergist, 40kg of coarse aggregate, 8kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 1.7kg of naphthalene water reducer, 0.2kg of alkyl tin carboxylate, 0.7kg of pentaerythritol, 0.2kg of styrene prepolymer and 12kg of water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Example 5

A preparation method of reinforced polymer cement concrete comprises the following steps:

s1, adding 6kg of nano diatomite into 60kg of ethanol water solution with the mass fraction of 50%, stirring, standing for 15h, extracting the upper suspension, adding 0.15kg of dimethyl sulfoxide and 1.5kg of nano silicon dioxide, and stirring for 3h at 60 ℃ to obtain slurry;

s2, heating 100kg of water to 75 ℃, slowly adding 30kg of polyphenylene sulfide resin powder, uniformly stirring, adding 3kg of emulsifier, and continuously stirring for 1.5h to obtain polyphenylene sulfide emulsion;

adding 1.5kg of coupling agent into the slurry, stirring, adding 12kg of polyphenylene sulfide emulsion, and continuously stirring for 3h at 70 ℃ to obtain a premix;

s3, sequentially adding 100kg of 42.5-grade portland cement, 1.5kg of reinforcing synergist, 35kg of coarse aggregate, 10kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 1.5kg of naphthalene water reducer, 0.5kg of alkyl tin carboxylate, 0.5kg of pentaerythritol, 0.5kg of methyl methacrylate and 10kg of water into the premix, and uniformly stirring to obtain the reinforced polymer cement concrete.

Comparative example 1

Commercially available ordinary polymer cement concrete was used.

Comparative example 2

A preparation method of polymer cement concrete comprises the following steps: 100kg of 42.5-grade portland cement, 1.5kg of reinforcing synergist, 35kg of coarse aggregate, 10kg of sand powder with fineness modulus of 2.70-2.85 and stone powder content of less than 0.30%, 1.5kg of naphthalene water reducer, 0.5kg of alkyl tin carboxylate, 0.5kg of pentaerythritol, 0.5kg of methyl methacrylate and 10kg of water are sequentially added into 12kg of polyphenylene sulfide emulsion, and the mixture is uniformly stirred to obtain the reinforced polymer cement concrete.

Concrete was formed and cured in accordance with example 5 and comparative examples 1-2, and mechanical properties were measured in accordance with test protocols for road engineering cement and cement concrete (JTGE 30-2). The test results are as follows:

since the flexural strength, compressive strength and flexural to compressive ratio reflect the durability of concrete, it can be seen from the above table that: compared with common polymer cement concrete, the flexural strength, the compressive strength and the flexural-compressive ratio of the reinforced polymer cement concrete are obviously enhanced, and the reinforced polymer cement concrete can obtain better reinforcement and excellent durability when being used for paving bus stops or tunnel pavements.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.