A kind of preparation method of SBS latex modified asphalt

Abstract

The invention discloses a preparation method of SBS latex modified asphalt, which comprises the following steps: 1) Stir and swell base asphalt and SBS latex at a temperature of 120-140°C for 20-30 minutes, wherein the mass dosage of SBS latex is 3% to 8% of the mass of base asphalt; the preparation of SBS latex is to soak the SBS solid particles in trichlorethylene for 1.5 to 2.5 hours, and then add emulsifier and water to make soap to obtain SBS latex; 2) Step 1) The obtained materials, heat transfer oil and polyphosphoric acid are stirred and developed at 140-155°C for 20-30 minutes, and then poured into the finished product tank to obtain SBS latex modified asphalt, wherein the quality of heat transfer oil is 2-4 %, the mass of polyphosphoric acid is 2-5‰ of the mass of base asphalt. Compared with the traditional process, the process of the present invention has lower production temperature, less asphalt aging, less environmental pollution, and only water evaporates out. During the preparation process, only stirring is required, no shearing is required, the development time is shorter, and energy consumption is lower. Reduce economic costs.

Description

technical field [0001] The invention relates to a preparation method of SBS latex modified asphalt, which belongs to the field of road materials. Background technique [0002] As traffic volumes increase, vehicle weights increase, and high and low temperatures play a role, ensuring good pavement performance is becoming more and more critical. SBS modified asphalt concrete has good high-temperature stable anti-rutting ability and low-temperature anti-crack ability, which improves the water stability of asphalt, improves the anti-skid ability of the road surface, enhances the bearing capacity of the road surface, and improves the oxidation resistance of asphalt. , therefore, SBS modified asphalt will be more in-depth research and wider application in a long period of time in the future. [0003] The existing SBS modified asphalt preparation method is as follows: (1) Heat the base asphalt to 170°C and put it into the expansion tank of the modification equipment, add the SBS mo...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing SBS latex modified asphalt, which effectively solves the problems of asphalt aging, large environmental pollution, large energy consumption, long development time, and high economic cost in the traditional SBS modified asphalt production process.

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