Preparation and properties of asphalts modified with SBS/ organobentonite blends

• Published in: Polymers & polymer composites Vol. 14; no. 4; pp. 403 - 411
• Main Authors: WANG, Yun-Pu, LIU, Dong-Jie, LI, Yu-Feng, WANG, You-Peng, GAO, Jing-Min
• Format: Journal Article
• Language: English
• Published: Shrewsbury Rapra Technology 01.01.2006; Sage Publications Ltd
• Subjects: Application fields; Applied sciences; Bitumen. Tars. Bituminous binders and bituminous concretes; Buildings. Public works; Exact sciences and technology; Materials; Polymer industry, paints, wood; Technology of polymers; Clay; Organic clay; SBS; Ageing; Thermoplastic rubber; Organic silane; Experimental study; Fabrication property relation; Composite material; Coupling agent; Polymer modified asphalt; Triblock copolymer; Storage stability; Bentonite; Manufacturing; Application; Rheological properties
• ISSN: 0967-3911; 1478-2391
• DOI: 10.1177/096739110601400406

The properties of asphalt that had been modified by adding styrene butadiene styrene block copolymers (SBS) and organobentonite clay were investigated. In asphalt mixtures, additives can be bonded to other constituents by using silane coupling agents (SCA). This improves the high-temperature storage stability, rheological properties and after-ageing properties significantly in comparison with pure SBS modified asphalts. The improvement in high-temperature storage stability could be attributed to the organobentonite and SCA decreasing the difference in densities between SBS and asphalt. The organobentonite and SCA contents affected the rheological and low-temperature physical properties. The optimum amount of organobentonite was 2% and of SCA was 1%. These modifications also improved the after-ageing properties of the modified asphalts to some extent.