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A kind of rubber powder modified asphalt and preparation method thereof

A technology for modifying asphalt and rubber powder, used in building components, building insulation materials, construction, etc., can solve the problem of poor fluidity of rubber powder and rock asphalt materials, poor adhesion between rubber powder and rock asphalt, affecting modification Asphalt product quality and other issues, to achieve the effect of improving product market competitiveness, improving anti-aging ability, and improving viscosity

Active Publication Date: 2022-02-18
周俊肖 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the poor fluidity of rubber powder and rock asphalt materials, in the process of producing modified asphalt, the viscosity of the modified asphalt synthesis system is high, and the rubber powder is not easily dispersed in rock asphalt, and the gap between rubber powder and rock asphalt The miscibility between rubber powder and rock asphalt is poor, the probability of collision between rubber powder and rock asphalt molecules is reduced, and the phenomenon of poor adhesion between rubber powder and rock asphalt is prone to occur, which affects the quality of modified asphalt products

Method used

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  • A kind of rubber powder modified asphalt and preparation method thereof
  • A kind of rubber powder modified asphalt and preparation method thereof
  • A kind of rubber powder modified asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: a kind of preparation method of rubber powder modified asphalt, comprises the steps:

[0036] (1) Powder pretreatment: crush and grind the waste tires, and sieve them with sieves with apertures of 65 μm and 150 μm respectively. The particles with larger particle sizes continue to be crushed until the particles are smaller than 150 μm. Rubber with a particle size of 65 μm-150 μm is selected. Powder; Weigh 32.5Kg of rubber powder with a particle size of 65 μm-150 μm, 4Kg of SBS asphalt modifier, 0.5Kg of white carbon black, 2.75Kg of zinc oxide, 0.9Kg of pentaerythritol phosphate, and 1.4Kg of alkylphenol polyoxyethylene ether , 1.3Kg talcum powder, 1.75Kg carboxymethyl cellulose and 2.5Kg attapulgite, mix well, pulverize, and sieve with sieves with apertures of 20μm and 125μm respectively, and continue to pulverize the particles with larger particle sizes until the particles are smaller than 125μm ,, to prepare a modified powder with a particle size of 20 μ...

Embodiment 2

[0041] The difference between Example 2 and Example 1 is that the particle size of the rubber powder in Example 2 is 200 μm-450 μm, and the others are consistent with Example 1.

Embodiment 3

[0043] The difference between embodiment 3 and embodiment 1 is that embodiment 3 does not add carboxymethyl cellulose, and the others are consistent with embodiment 1.

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Abstract

The invention discloses a rubber powder modified asphalt and a preparation method thereof, and relates to the technical field of asphalt modification; a rubber powder modified asphalt is prepared from modified asphalt raw materials containing the following parts by weight: matrix asphalt 50‑60 30-35 parts of rubber powder, 1-5 parts of SBS asphalt modifier, 0.2-0.8 parts of white carbon black, 1-4 parts of zinc oxide, 0.5-1.2 parts of pentaerythritol phosphate, 3-10 parts of polyphosphoric acid; The modified asphalt raw material also includes a solubilizer, and the solubilizer includes 0.5-2.5 parts by weight of alkylphenol polyoxyethylene ether and 0.5-2 parts by weight of talcum powder; it has good compatibility Advantages: The preparation process of rubber powder modified asphalt includes the following steps: powder pretreatment, swelling, homogeneous refinement and asphalt development, etc.; the preparation process of rubber powder modified asphalt has the advantage of improving product compatibility.

Description

technical field [0001] The invention relates to the technical field of asphalt material processing, in particular to a rubber powder modified asphalt and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a high-viscosity organic liquid and an organic gelling material that is waterproof, moisture-proof and anti-corrosion. Asphalt is divided into three types: coal tar pitch, petroleum pitch and natural pitch. Among them, coal tar pitch is a by-product of coking, petroleum pitch is the residue after crude oil distillation, and natural pitch is stored underground, forming ore layers or accumulating on the surface of the earth's crust. Asphalt is widely used in construction, road construction and other fields due to its excellent ductility and other properties. [0003] SBS modified asphalt is based on base asphalt, adding a certain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L19/00C08L71/02C08K13/04C08K7/26C08K3/22C08K5/521C08K3/32C08K3/34
CPCC08L95/00C08K2003/329C08K2003/2296C08L2555/34C08L2555/84C08L2205/035C08L2207/24
Inventor 李晓文
Owner 周俊肖