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High dispersibility high viscosity modified asphalt

A modified asphalt, high-dispersibility technology, applied in building components, building insulation materials, construction, etc., to achieve high viscosity, good dispersion and stability

Inactive Publication Date: 2007-07-04
SHANGHAI QUNKANG ASPHALTUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, modified asphalt for water-permeable pavement with good dispersion and stability has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Take 100 kg of base asphalt with a penetration of 300, heat it to 180°C, add 8 kg of styrene-isoprene-styrene block copolymer (SIS) (average molecular weight: 160,000) and 12 kg of petroleum resin in sequence And polypropylene wax (average molecular weight is 5000, and softening point is 130 ℃) 1 kilogram, adopt strong mixer to stir 6 hours with the stirring speed of 200 rpm, add 0.18 kilogram of sulfur powder, continue to stir for 1 hour, prepare modified Asphalt, the results are shown in Table 1.

[0016] Index of modified asphalt

[0017] It can be seen from the table that high-performance modified asphalt is prepared, the viscosity at 60 degrees is greater than 20,000 Pa.s, and the PG classification reaches 82-28. High-performance modified asphalt can be used for OGFC, and it can also be used for bridges. Surface pavement, stress absorbing layer and other special occasions.

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PUM

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Abstract

The invention relates to a high-dispersity high-viscosity modified asphalt which comprises the following constituents (by weight ratio): asphalt 100, styrene-isoprene-styrene segmented copolymer 3-12 having an average molecular weight of 30-300 thousand, petroleum resin 5-30 with a softening point of 70-150 deg C, polypropene wax 1-4 having an average molecular weight of 500-15000 and a softening point of 90-160 deg, sulfur 0.05-1. According to the invention, high viscosity, good dispersity and stability can be achieved, the PG classification can reach 82-28. The obtained high-performance modified asphalt can be used for both the general water seeping pavements, and specific sites such as bridge pavement and stress absorption layer.

Description

technical field [0001] The invention relates to a high-viscosity modified asphalt for water-permeable pavement. Background technique [0002] High-viscosity asphalt refers to asphalt with a viscosity greater than 20Pa.s at 60°C, which is suitable for paving traffic roads and drainage roads. High-viscosity asphalt is currently mainly prepared by adding polymers to petroleum asphalt. Adding polymers to modify petroleum asphalt can significantly improve the high and low temperature performance of asphalt, and provide high temperature anti-rutting and low temperature anti-cracking capabilities of asphalt pavement. However, due to the differences in molecular weight and viscosity between polymers and asphalt, it is difficult to disperse polymer-modified asphalt; at the same time, because most polymers are completely compatible with asphalt, and there is a density difference, resulting in the modification of asphalt systems. The storage stability at high temperature is not good,...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K3/06C08L53/02C08L57/02
Inventor 黄子章
Owner SHANGHAI QUNKANG ASPHALTUM TECH CO LTD
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