CN105801002B - A kind of processing method of polyurethane rubber concrete material and the material - Google Patents

Abstract

A polyurethane rubber concrete material and a processing method of the material, comprising the following substances and parts by weight: 100 parts of stone; 1-20 parts of rubber powder; 3-15 parts of polyurethane; Stones with a diameter greater than or equal to 5 and less than 10mm and stones with a particle diameter greater than or equal to 10 and less than 15mm; the polyurethane described above is a two-component or one-component thermosetting material with a tensile strength of >8MPa and a tensile elongation at break >50%, normal temperature viscosity <1500mPa·s. The polyurethane rubber concrete material provided by the present invention has the following advantages: compared with the prior art, the present invention reduces the consumption of polyurethane, reduces the cost by about 30%, and the addition of waste rubber powder further improves the cold resistance and fatigue resistance of the material , and no water seepage, when used to pave bridge decks and road surfaces, reduce the thickness of the pavement layer, reduce the weight of the surface layer, and prolong the service life of the road and bridge decks.

Description

A kind of polyurethane rubber concrete material and its processing method

technical field

The invention relates to a polyurethane rubber concrete material, and also relates to a processing method of the material.

Background technique

At present, pavement materials for pavements and bridge decks are mainly asphalt concrete or modified asphalt concrete materials. Due to the performance characteristics of asphalt itself, the pavement material is easy to flow at high temperature and easy to crack at low temperature. As a result, a series of diseases such as shifting, rutting, potholes, and cracks appear on the road surface and bridge deck, which affects the service life of roads and bridges, and increases the economic and time costs of road and bridge maintenance. For this reason, people have carried out exploration and research to new pavement material. For example, Chinese patent CN101497510 discloses a preparation method of epoxy resin concrete material. Compared with asphalt concrete, epoxy resin concrete material exhibits excellent bonding performance, high temperature resistance, and higher strength; but there are also certain shortcomings, such as general cold resistance, high low temperature brittleness, and poor fatigue resistance. , mixing and paving temperature is high. Another example is Chinese patent CN104446140 which discloses a modified polyurethane rubber concrete thin-layer pavement material. Compared with epoxy concrete and asphalt concrete, this kind of material shows good low temperature performance, the toughness of concrete material is improved, and the fatigue resistance performance is increased. Although epoxy resin and polyurethane-based concrete materials exhibit excellent performance, the amount of epoxy resin and polyurethane binder is relatively large, usually 20 to 30% of the amount of stone, and the cost is relatively high.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a polyurethane rubber concrete material with excellent cold resistance and fatigue resistance, dense and impermeable, and low production cost and a processing method of the material.

The main technical scheme adopted according to the polyurethane rubber concrete material provided by the invention is:

Contains the following substances and parts by weight:

100 parts of stone;

Mineral powder 0~8 parts;

1-20 parts of rubber powder;

3-15 parts of polyurethane.

The polyurethane rubber concrete material provided by the invention also adopts the following subsidiary technical schemes:

The stone materials include stones with a particle size of less than 5mm, stones with a particle size of 5-10mm and stones with a particle size of 10-150mm.

The weight ratio of the stones with a particle size of less than 5 mm, the stones with a particle size of 5-10 mm, and the stones with a particle size of 10-150 mm is 60-80: 10-20: 10-20.

The polyurethane is a two-component or one-component thermosetting material with a tensile strength > 8MPa, a tensile elongation at break > 50%, and a viscosity at room temperature < 1500mPa·s.

The particle size of the rubber powder is 0.01-3mm.

The stone materials are basalt and/or limestone.

The rubber powder is waste rubber powder.

The main technical scheme adopted in the processing method of the polyurethane rubber concrete material provided by the present invention is as follows: mix the stone material and the rubber powder uniformly according to the mixing ratio, add polyurethane, and after mixing evenly, roll and form at a temperature of -20 to 50°C. 8 ~ 96h of curing, made of polyurethane rubber concrete material.

Compared with the prior art, the polyurethane rubber concrete material provided by the present invention has the following advantages: compared with the prior art, the present invention reduces the consumption of polyurethane, reduces the cost by about 30%, and the addition of waste rubber powder further improves the quality of the material. Cold resistance, fatigue resistance, and impervious to water, when used to pave bridge decks and roads, it can reduce the thickness of the pavement layer, reduce the weight of the surface layer, and prolong the service life of the road and bridge decks.

Compared with the prior art, the processing method of the polyurethane rubber concrete material provided by the present invention has the following advantages: simple process, few steps, not easily affected by external conditions, short processing cycle, and high paving efficiency.

Detailed ways

Embodiment one

According to the polyurethane rubber concrete material embodiment provided by the invention, contain following material and parts by weight:

100 parts of stone;

Mineral powder 0~8 parts;

1-20 parts of rubber powder;

3-15 parts of polyurethane.

The polyurethane is a two-component or one-component thermosetting material with a tensile strength > 8MPa, a tensile elongation at break > 50%, and a viscosity at room temperature < 1500mPa·s. The particle size of the rubber powder is 0.01-3 mm, preferably 0.05 mm in this embodiment. The stone material is basalt and limestone, and the stone material in this embodiment is basalt. The rubber powder is waste rubber powder, and the waste rubber powder is not only easy to process, reduces production cost, but also turns waste rubber into treasure, and reduces environmental pollution caused by waste rubber being unable to be reused.

The stone materials include stones with a particle size of less than 5mm, stones with a particle size of 5-10mm and stones with a particle size of 10-150mm. The weight ratio of the stones with a particle size of less than 5 mm, the stones with a particle size of 5-10 mm, and the stones with a particle size of 10-150 mm is 60-80: 10-20: 10-20.

In the present embodiment, the amount of stone used is 100 parts, wherein the weight ratio of the stones with a particle size of less than 5mm, the stones with a particle size of 5-10mm, and the stones with a particle size of 10-150mm is: 65% : 15% : 20%, the synthetic gradation is:

Satisfies the gradation requirements of the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) for the mixture;

The consumption of waste rubber powder is 6 parts,

The amount of polyurethane is 9 parts,

Mineral powder consumption is 2 parts.

The processing method of the above-mentioned polyurethane rubber concrete material is as follows: uniformly mix the above-mentioned stone and waste rubber powder, add the uniformly mixed polyurethane, stir for 1 min, roll and compact 75 times at a temperature of -20 to 50°C, and maintain for 24 hours. The above-mentioned processing method has simple process, few steps, is not easily affected by external conditions, has short processing cycle and high paving efficiency.

Compared with the prior art, the present invention reduces the amount of polyurethane used, reduces the cost by about 30%, and the addition of waste rubber powder further improves the cold resistance and fatigue resistance of the material, and is impervious to water. It is used for paving bridge decks and road surfaces. , reduce the thickness of the pavement layer, reduce the weight of the surface layer, and prolong the service life of the road surface and bridge deck.

Embodiment two

This embodiment is roughly the same as the above-mentioned embodiment 1, and the amount of stone material is 100 parts. The weight ratio of 150mm stones is: 70% : 15% : 15%, and the synthetic gradation is:

Satisfies the gradation requirements of the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) for the mixture;

Waste rubber powder consumption is 12 parts,

The amount of polyurethane is 12 parts,

Mineral powder consumption is 4 parts.

The processing method of the above-mentioned polyurethane rubber concrete material is as follows: uniformly mix the above-mentioned stone and waste rubber powder, add the uniformly mixed polyurethane, stir for 1 min, roll and compact 75 times at a temperature of -20-50°C, and maintain for 24 hours.

Embodiment three

This embodiment is roughly the same as the above-mentioned embodiment 1, and the amount of stone material is 100 parts. The weight ratio of 150mm stones is: 70% : 15% : 15%, and the synthetic gradation is:

Particle size (mm) 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing rate(%) 100 99.5 74 57 40 25 15 10 7

Satisfies the gradation requirements of the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) for the mixture;

Waste rubber powder consumption is 20 parts,

The polyurethane consumption is 13 parts.

The amount of mineral powder is 4 parts

The processing method of the above-mentioned polyurethane rubber concrete material is as follows: uniformly mix the above-mentioned stone and waste rubber powder, add the uniformly mixed polyurethane, stir for 1 min, roll and compact 75 times at a temperature of -20-50°C, and maintain for 24 hours.

Embodiment Four

This embodiment is roughly the same as the above-mentioned embodiment 1, and the amount of stone material is 100 parts. The weight ratio of 150mm stones is: 70% : 15% : 15%, and the synthetic gradation is:

Satisfies the gradation requirements of the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) for the mixture;

Waste rubber powder consumption is 20 parts,

Polyurethane consumption is 15 parts.

The amount of mineral powder is 0 parts

The processing method of the above-mentioned polyurethane rubber concrete material is as follows: uniformly mix the above-mentioned stone and waste rubber powder, add the uniformly mixed polyurethane, stir for 1 min, roll and compact 75 times at a temperature of -20-50°C, and maintain for 24 hours.

Embodiment five

This embodiment is roughly the same as the above-mentioned embodiment 1, and the amount of stone material is 100 parts. The weight ratio of 150mm stones is: 70% : 15% : 15%, and the synthetic gradation is:

Satisfies the gradation requirements of the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) for the mixture;

The consumption of waste rubber powder is 20 parts,

The polyurethane consumption is 13 parts.

The amount of mineral powder is 2 parts

The processing method of the above-mentioned polyurethane rubber concrete material is as follows: uniformly mix the above-mentioned stone and waste rubber powder, add the uniformly mixed polyurethane, stir for 1 min, roll and compact 75 times at a temperature of -20-50°C, and cure for 48 hours.

The obtained polyurethane rubber concrete material of above-mentioned 5 embodiments, performance test result is shown in the table below

While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by The appended claims and their equivalents are defined.

Claims (8)

1. a polyurethane rubber concrete material, is characterized in that: contain following material and weight part: 100 parts of stone; Mineral powder 2 parts; 6 parts of waste rubber powder; 9 parts polyurethane. 2 . The polyurethane rubber concrete material according to claim 1 , wherein the stones include stones with a particle size of less than 5 mm, stones with a particle size of 5-10 mm and stones with a particle size of 10-15 mm. 3. The polyurethane rubber concrete material according to claim 2, characterized in that: said particle diameter is less than 5mm stone, said particle diameter is 5-10mm stone and said particle diameter is 10-15mm stone The weight ratio is 60-80:10-20:10-20. 4. The polyurethane rubber concrete material according to claim 1, characterized in that: the polyurethane is a two-component or single-component thermosetting material, with a tensile strength>8MPa, a tensile elongation at break>50%, and a normal temperature Viscosity <1500mPa·s. 5. The polyurethane rubber concrete material according to claim 1, characterized in that: the particle diameter of the rubber powder is 0.01-3mm. 6. The polyurethane rubber concrete material according to any one of claims 1-5, characterized in that: the stone is basalt and/or limestone. 7. The polyurethane rubber concrete material according to any one of claims 1-5, wherein the rubber powder is waste rubber powder. 8. A processing method for processing the polyurethane rubber concrete material described in any one of claims 1-5, characterized in that: after mixing the stone and rubber powder evenly according to the proportion, adding polyurethane, stirring evenly, at a temperature of -20 ~ Rolling and forming at 50°C, and curing for 8 to 96 hours, the polyurethane rubber concrete material is obtained.