October 2011
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12 Reads
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9 Citations
Jianzhu Cailiao Xuebao/Journal of Building Materials
In order to improve properties of asphalts and asphalt mixtures, the selection and addition of nanometer materials, which were to modify the base asphalt was done, and the preparation of nanomaterials modified asphalt was conducted. A series of asphalt experiments were performed to analyze the basic performance, such as penetration, ductility, softening point, viscosity with atomic force microscope (AFM) and etc. Then, tests of asphalt mixtures were carried out to evaluate properties of nanomaterials modified asphalt mixtures, such as splitting strength, resilient modulus, rutting, water stability and etc. Besides, modified effects of nanomaterials (nanocarbon powders, nano powdered rubbers VP362 and sepiolite) were analyzed and compared. The test results show that the high temperature and low temperature crack resistance of asphalt and asphalt mixtures modified by 2% nanocarbon powders is better than these of asphalt and asphalt mixtures modified by VP362 or sepiolite, also it is confirmed scientifically by atomic force microscope(AFM) experiments from microcosmic viewpoint.