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Emulsified SBS modified asphalt and its processing method

A technology of modified asphalt and processing method, which is applied in the direction of building components, building insulation materials, buildings, etc. It can solve the problems of not being able to significantly improve the high temperature resistance, not meeting the requirements of road surface performance, and lacking the performance of modified emulsified asphalt. The effect of shortening the closing time of traffic, improving the driving performance and improving the construction conditions

Inactive Publication Date: 2005-09-07
杨林江
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  • Claims
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AI Technical Summary

Problems solved by technology

Most of the existing technologies use modifiers such as styrene-butadiene latex, neoprene latex, and EVA latex. Styrene-butadiene latex (SBR) is a kind of synthetic rubber. High temperature capability; EVA and other thermoplastic resins are used to produce modified emulsified asphalt, which can improve high temperature resistance, but cannot improve low temperature resistance
Therefore, the above-mentioned types of modifiers lack the ability to comprehensively improve the performance of modified emulsified asphalt, and cannot meet the requirements of modern traffic for road performance.

Method used

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Embodiment Construction

[0022] Main technological process described in the present invention is:

[0023] 1. Preparation of modified asphalt

[0024] (1) When the base asphalt temperature reaches 150-180°C, add SBS modifier accounting for 1-8% by weight of the base asphalt to fully disperse and swell;

[0025] (2) Pass the swollen matrix asphalt and SBS through a high-speed shear mill to achieve refinement and further dispersion, and control the particle size of the asphalt and SBS to be less than 5 μm.

[0026] 2. Preparation of emulsion

[0027] Put the emulsifier, stabilizer, water, hydrochloric acid and other materials into the mixer in proportion, so that the emulsifier is fully dissolved in the water, and the temperature is controlled at 60-80°C to prepare an emulsifier with an emulsifier content between 15-30‰ aqueous solution.

[0028] 3. Emulsification process:

[0029] Process (1): SBS modified asphalt and emulsion are synchronously pressurized to 0.1-1.2MPa according to the ratio of (1...

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Abstract

Disclosed is an emulsified SBS modified pitch and the preparing method, belonging to the technology field of pitch modifying and emulsifying processing. The stock comprises base pitch, modifier, emulsion made by emulsifier and water; the invention is characterized in that the said modifier is macromolecular polymer thermoplastic rubber SBS in solid state, the consumption is 1~8% of the base pitch in mass; and said emulsion is 50~100% of the base pitch in mass. The method comprises putting the SBS into pitch to get the modified pitch, feeding the modified pitch and emulsion into emulsifier for emulsion and getting the emulsified SBS modified pitch. The invention is characterized by the reasonable formulation and the improvement in the low temperature resistance, high-temperature resistance, elastic recovery ability and the increase in binding strength and the engineering application in slurry coating etc.

Description

technical field [0001] The invention relates to emulsified SBS modified asphalt and a processing method thereof, belonging to the technical field of asphalt modification and emulsification processing. Background technique [0002] The slurry seal construction technology with emulsified asphalt as the binder has many advantages such as wide application range, convenient construction, energy saving, pollution reduction, and extended construction period. However, due to the shortcomings of single base asphalt, such as strong temperature sensitivity, low viscosity, and poor flexibility, the popularization and application of slurry seal technology is restricted. Therefore, emulsified asphalt is modified to make it have ideal low temperature crack resistance. , high temperature stability, enhanced bonding ability and elastic recovery ability are of extremely important significance. [0003] The key factor that determines the quality of emulsified modified asph...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08K5/09C08L95/00
Inventor 杨林江
Owner 杨林江
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