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Asphalt compositions and preparation method thereof

A kind of asphalt composition and asphalt technology, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of limited use, high viscosity of 135C, poor compatibility, etc., so as to reduce construction difficulty, improve high temperature performance, and effectively Conducive to the effect of construction

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

Problems solved by technology

The disadvantage of this technology is that the compatibility between SBS and asphalt is generally poor, so if the compatibility of asphalt used is poor, it is difficult to produce qualified modified asphalt. It is more difficult to mix and spread
In this method, because the sulfur content is too low, the SBS content used is very high, and the storage stability of SBS modified asphalt is not good.
[0005] Chinese patent CN1276820A discloses paraffin-modified asphalt produced by Fischer-Tropsch synthesis, but the disadvantage of this method is that the low-temperature performance of modified asphalt is not good, and its use is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 500g Huanxiling 90# asphalt is placed in a 1-liter beaker, the asphalt is heated to 180°C, then 15gFT paraffin (Germany Schumann. Sasol company production, trade name Sasobit), 80g petroleum resin are added to the beaker respectively In the asphalt, use a strong mixer to stir at 200 rpm for 240 minutes, observe that the polypropylene wax in the beaker has been evenly dissolved in the asphalt, and then slowly add 0.75 grams of sulfur powder within one minute and continue stirring After 120 minutes, the asphalt was placed in a 163C oven for 120 minutes to obtain modified asphalt, the properties of which are shown in Table 1.

[0017] serial number

[0018] It can be seen from Table 1 that the modified asphalt prepared by the present invention has excellent high-temperature performance and low high-temperature viscosity, indicating that it is easy to construct and can be used for conventional road surface repair.

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PUM

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Abstract

The invention relates to a composite modified asphalt for roads and process for preparation, wherein the asphalt composition comprises comprises asphalt, FT mineral wax, petroleum resin and sulfur, wherein the content of FT wax is 0.5-6 wt% of the asphalt, the content of petroleum resin is 5-30 wt% of the asphalt, the content of sulfur is 0.05-1 wt% of the asphalt. By charging FT wax into mixture of asphalt, the invention can achieve improved high-temperature behavior of the asphalt, lowered 135C viscosity of modified asphalt, and reduced difficulty of asphalt construction.Furthermore, the addition of petroleum resin also increases the adhesiveness of the asphalt with stone-like materials.

Description

technical field [0001] The invention belongs to the technical field of composite modified asphalt for roads and a preparation method thereof. Background technique [0002] The addition of copolymers has been used to improve the properties of bitumen for decades. Styrene butadiene triblock copolymer SBS is currently the most commonly used copolymer for improving the performance of asphalt. [0003] US4145322 discloses a method for preparing SBS (being styrene butadiene triblock copolymer) modified bitumen, heating the bitumen to a temperature of 130-230 C, adding SBS, SBS being 2%-20% of the bitumen weight , using sulfur as a cross-linking agent. The disadvantage of this technology is that the compatibility between SBS and asphalt is generally poor, so if the compatibility of asphalt used is poor, it is difficult to produce qualified modified asphalt. It is more difficult to mix and spread. [0004] US5371121 discloses a method for preparing SBS modified asphalt, which on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/06C08L57/02C08L91/06
Inventor 黄子章
Owner SHANGHAI QUNKANG ASPHALTUM TECH CO LTD
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