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Preparation and Properties of Crumb Rubber Compound Modified Asphalt for Waterproofing Membrane

Author: WangHai
Tutor: YuJianYing
School: Wuhan University of Technology
Course: Materials Science
Keywords: Waterproofing membrane Rubber powder Modified asphalt SBS APP Thermal aging
CLC: U414
Type: Master's thesis
Year: 2010
Downloads: 236
Quote: 3
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Abstract


With the rapid development of the domestic construction industry, the building waterproof materials is also increasing because of their excellent performance, polymer modified bitumen membrane to become recognized as a quality waterproof material, but because of its high cost, to a certain extent on restricting the promotion and application. With the development of China's automobile industry, the volume of output of scrap rubber in China in recent years, the rapid growth, the effective economic utilization of waste rubber has become a hot topic. Made of scrap rubber powder, rubber powder production of modified asphalt and either recycled waste rubber, and can effectively protect the environment. Single crumb rubber modified asphalt is difficult to meet the performance requirements of the waterproof material, such as composite can crumb rubber and SBS, APP for asphalt modification, may be prepared to meet the performance requirements of waterproof material, which can reduce the waterproofing membrane costs, but also to protect the environment, with great economic, social and environmental benefits. This article is prepared crumb rubber modified asphalt melt blending process conditions on the performance of rubber modified asphalt. The results show that: the crumb rubber modified asphalt optimum process conditions are a temperature of 215 ° C and a shear rate of 4000rpm, shearing time was 40min. Crumb rubber modified asphalt performance results show that: as the crumb dosage increases, the modified asphalt of penetration is reduced, the softening point is increased, the elastic recovery rate is increased, but the rubber powder added in an amount of more than 20 percent the asphalt performance improvement significantly reduced. On the basis of the above study, were used talc and fly ash as a filler to study the impact of different types of fillers on rubber modified asphalt coated cover material physical properties and aging properties. The results show that: in the same dosage, crumb rubber modified asphalt mixed with fly ash coated cover material penetration, softening point and elastic recovery rate is greater than the modified asphalt mixed with talcum powder-coated material, and fly ash coated cover material showed better anti-aging properties. To improve the heat resistance and low temperature flexibility, crumb rubber and SBS composite used for asphalt modification to study the impact of different types of SBS rubber modified asphalt performance rubber modified asphalt crumb / SBS composite modified asphalt and coated material physical properties, aging properties were also studied. The results show that the the: star SBS rubber modified asphalt performance impact is more pronounced, but thermal aging and UV aging test results show that the SRP / linear SBS compound modified asphalt and coated material has better anti-aging properties. This paper also studies the the crumb / APP modified asphalt and coated material physical properties and aging properties of the and different filler crumb / APP modified bitumen coated material properties. The results show that: with the increase of APP dosage crumb / APP modified asphalt penetration declined significantly increased softening point, low temperature flexibility first increases and then decreases. Talc, fly ash incorporation of the coated material performance relative to the more obvious, heat aging tests showed that the fly ash coated cover material relative to the incorporation of talc-coated cover material has better anti aging properties.

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