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Properties of bituminous mixtures modified with a nano-organosilane additive

ABSTRACT The authors aimed to determine the functional properties of binders and asphalt-mixtures modified with a liquid nano-organosilane additive. Hence, conventional and rheological tests of bitumen, Fourier transform infrared spectroscopy, and resilient modulus using indirect tensile test were applied. The results indicated that although this silane-based additive creates a hydrophobic layer over the surface of aggregates, which significantly improve the resistance of asphalt-mixtures against water damage; it has inconsiderable effect on rutting, fatigue, and elastic-response properties of both binders and asphalt mixtures. Furthermore, effect of it on low-temperature cracking of binders is still open for discussion.