Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 40, Issue -, Pages 1151-1155Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2012.11.097
Keywords
Modified bitumen; Organic layered silicates; Microstructure; Flame retardancy; Aging
Categories
Funding
- National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2011BAE28804]
- National Natural Science Foundation of China [51078331]
- Project of Young Teacher Growth of Hunan University
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The effect of organic layered silicates (OLSs) on the flame retardancy and aging properties of the bitumen was investigated as well-as the microstructures of the binders. X-ray diffraction shows that organic rectorite (OREC) and organic montmorillonite (OMMT) modified bitumens form the intercalated nanostructures, while the organic expanded vermiculite (OEVMT) modified bitumen forms the exfoliated nanostructure. The mass change rate and viscosity aging index of the bitumen are decreased by OLSs after thin film oven test and pressure aging vessel aging. Compared with OREC and OMMT, OEVMT has more pronounced improvements in flame retardancy and aging resistance of bitumen. (C) 2012 Elsevier Ltd. All rights reserved.
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