Polymer chemically-modified asphalt composition capable of being stably stored at high temperature and preparation method thereof

A technology of polymer chemistry and modified asphalt, used in building structures, building insulation materials, building components, etc. High and low temperature performance, the effect of preventing asphalt curing

Inactive Publication Date: 2009-12-30
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, these additives cannot fundamentally improve the high temperature stability of asphalt

Method used

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  • Polymer chemically-modified asphalt composition capable of being stably stored at high temperature and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0054] This is an embodiment of the present invention.

[0055] Heat asphalt A to 170±10°C, add 4wt% styrene-butadiene rubber (SBR1500), stir and disperse with a high-speed shear mixer for 30-60 minutes, add 0.02-0.03wt% vulcanizing agent, and then add 0.3-0.4 Wt% additives and fillers, continue to stir and disperse for 30-60 minutes, the mixture is uniform, and the storage stability is good.

Embodiment 2

[0057] This is an embodiment of the present invention.

[0058] Heat asphalt A to 170±10°C, add 6wt% styrene-butadiene rubber (SBR1500), stir and disperse with a high-speed shear mixer for 30-60 minutes, add 0.04-0.05wt% vulcanizing agent, continue stirring and dispersing for 30- After 60 minutes, the mixture is uniform and has good storage stability.

Embodiment 3

[0060] This is an embodiment of the present invention.

[0061] Heat asphalt A to 170±10°C, add 4-5wt% styrene-butadiene rubber (SBR1500) and styrene-butadiene-styrene block copolymer (SBS), stir and disperse with a high-speed shear mixer for 30- After 60 minutes, add 0.04-0.05wt% of sulfur-containing compounds, then add 0.3-0.4wt% of additives and fillers, continue stirring and dispersing for 30-60 minutes, the mixture is uniform, and the storage stability is good.

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Abstract

The invention relates to a high polymer chemically-modified asphalt composition and a preparation method thereof. The preparation method comprises the following steps: chemically modifying rubber, elastomer and base asphalt, and additionally matching stuffing and processing aids; premixing the materials by high polymer processing equipment to prepare the master batch of the modified asphalt; and fully dispersing the master batch into the asphalt by a high-speed shear mixer or by mechanical stirring. Or the modified asphalt material can be prepared by firstly pre-preparing a viscous liquid mixture of modified asphalt and then stirring and mixing the viscous liquid mixture of modified asphalt with the base asphalt. The modified asphalt material prepared by the invention has stable storage performance at high temperature, good performance at high temperature and low temperature, stable processing and preparation and simple and convenient method, and not only can be directly used in factory production but also can be used for road laying sites and in the construction of waterproofing materials.

Description

technical field [0001] The invention relates to a polymer chemically modified asphalt composition with high temperature storage stability and a preparation method thereof. Background technique [0002] Bitumen is a useful surface finishing composition in road surface construction. Modification of asphalt with elastomeric polymers is a widely used technology to improve the performance of asphalt. Elastomeric polymers are added to asphalt, such as styrene-butadiene rubber (SBR), styrene-butadiene-styrene block copolymer (SBS) It is the most commonly used two types of modifiers, which can significantly improve the high and low temperature performance of asphalt, improve the aging performance of asphalt, and improve the viscoelastic and viscoelastic properties of asphalt. It has been widely used in asphalt. The role of the elasticity is to allow the composition to deform when subjected to stress (such as when a car passes by) and then quickly return to its original state, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L9/06C08L53/02C08K5/524C08J3/20C08J5/10C08K3/00C08K5/47
Inventor 王云普崔文峰金勇欧彦伟
Owner NORTHWEST NORMAL UNIVERSITY
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