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Storable rubber powder modified asphalt and preparation method thereof

A modified asphalt, storage-resistant technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of rubber asphalt failing to meet design requirements, rubber asphalt cannot be stored overnight, and mixture design failures, etc., and achieve low prices. , Reduce product cost, good performance attenuation and low temperature crack resistance

Inactive Publication Date: 2010-07-14
SHENYANG SANXIN GROUP PANJIN ROAD MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, experiments and physical engineering have proved that when the rubber powder modified asphalt is heated to 185-195°C, if it is not used immediately, the viscosity of the rubber asphalt will be less than 1 Pa.s at 180°C after being stored for 2 days, and the softening point will decay to about 50°C. As a result, the rubber asphalt does not meet the design requirements, the design of the mixture fails, the rubber asphalt cannot be stored overnight, and the rubber asphalt is discarded in case of rain or construction failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 7.8t of Liaohe No. 90 asphalt and heat it to 180°C in a reactor, then add 2.2t of waste tire rubber powder with a water content of less than 5%, a metal content of less than 0.4%, an ash content of less than 8%, and a mesh size of 30 mesh. Containing 0.25% dicumyl peroxide in the mass fraction of the rubber powder, adding 0.3% alkylphenol polysulfide in the rubber powder mass, stirring at a low speed (300-1000 rpm) for 15 minutes in a mixing tank, Raise the temperature to 190°C, then grind it again with a high-speed shearing machine, pump it to a storage tank for development, and add an anti-reversion agent of 0.15% of the rubber powder mass to the developed product, wherein the anti-reversion agent is bismaleimide and stir evenly to obtain storable rubber powder modified asphalt.

Embodiment 2

[0026] Take 8.5t of Liaohe No. 90 asphalt and heat it to 180°C in a reaction kettle, then add 1.5t of waste tire rubber powder with a water content of less than 5%, a metal content of less than 0.4%, an ash content of less than 8%, and a mesh size of 30 mesh. Containing 0.25% dicumyl peroxide in the mass fraction of the rubber powder, adding 0.3% alkylphenol polysulfide in the rubber powder mass, stirring at a low speed (300-1000 rpm) for 15 minutes in a mixing tank, Raise the temperature to 190°C, then grind it again with a high-speed shearing machine, pump it to a storage tank for development, add an anti-reversion agent of 0.15% of the rubber powder mass to the developed product, wherein the anti-reversion agent is a silane tetrasulfide compound, and stir Evenly, the storable rubber powder modified asphalt is obtained.

Embodiment 3

[0028] Take 7.9 tons of Liaohe No. 90 asphalt and heat it to 180°C in a reaction kettle, then add 2.1 tons of waste tire rubber powder with a water content of less than 5%, a metal content of less than 0.4%, an ash content of less than 8%, and a mesh size of 30 mesh. Containing 0.25% dicumyl peroxide in the mass fraction of the rubber powder, adding 0.3% alkylphenol polysulfide in the rubber powder mass, stirring at a low speed (300-1000 rpm) for 15 minutes in a mixing tank, Raise the temperature to 190°C, then grind it again with a high-speed shearing machine, pump it to a storage tank for development, add an anti-reversion agent of 0.15% of the rubber powder mass to the developed product, wherein the anti-reversion agent is a silane tetrasulfide compound, and stir Evenly, the storable rubber powder modified asphalt is obtained.

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Abstract

The invention relates to storable rubber powder modified asphalt which is characterized by comprising asphalt, rubber powder, an activating agent and an anti-reversion agent, wherein the asphalt is heavy road petroleum asphalt, the penetration degree is 50-110, the rubber powder is the rubber powder prepared by grinding a waste tyre by adopting a normal temperature method, the weight ratio of the asphalt and the rubber powder is 70-85:15-25, the rubber powder contains a cross linker accounting for 0.1-0.5wt% of the rubber powder, and the technical indexes of the rubber powder are as follows: the water content is smaller than 5 percent, the metal content is smaller than 0.4 percent, the ash content is smaller than 8 percent, and the size is 20-80 meshes. The activating agent is an alkyl phenol polysulfide and accounts for 0.1-1wt% of the rubber powder, and the anti-reversion agent is a bimaleimide or silane tetrasulfide compound and accounts for 0.1-0.5wt% of the rubber powder. The product has the characteristic of softening-point attenuation resistance when in high temperature storage, is widely applied to an asphalt mixture and has the characteristics of factory continuous and stable environment-friendly production, low oil usage quantity and the like.

Description

technical field [0001] The invention relates to a road construction material, and in particular provides a storage-resistant rubber powder modified asphalt and a preparation method thereof. Background technique [0002] As a continuous pavement, asphalt pavement has the characteristics of comfortable driving and easy maintenance, and has become the main form of pavement. However, asphalt pavement has insufficient high temperature stability, low temperature crack resistance, and water damage resistance, which easily cause rutting, cracks, and potholes. In order to reduce the premature appearance of diseases, modified asphalt materials are mostly used now. At present, SBS modified asphalt is widely used as the modified asphalt material, but this kind of asphalt modifier has the problem of high price, and the modification process is relatively complicated. The addition of waste rubber powder can make the asphalt achieve the effect of modification, and its performance index ca...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08K5/14C08K5/372C08K5/3415C08K5/548
Inventor 卢长虹郭志刚徐桂荣王仕峰周乃承李荫国张海峰佟军华郭巍巍
Owner SHENYANG SANXIN GROUP PANJIN ROAD MATERIALS
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