Intensifying the Road Performance of Asphalt Concrete by Matching the Size Distribution of Short-Thin Straw Pieces and Aggregate Framework
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 5
Abstract
In order to reduce costs and prevent environmental pollution in the fabrication process of straws fibrosis, a simple and efficient method of straw reinforcing asphalt concrete is proposed, which means to add short-thin straw pieces (STSP) into asphalt mixture directly by matching the size distribution of STSP and the aggregate spacing of asphalt mixtures. The road performances were testified in terms of the properties of bending, rutting and Marshall stability of the prepared straw asphalt concrete (SAC) samples. The results show that the flexural strength of asphalt mixture increased by 6%, the dynamic stability increased by 54% (reached 1,592 times) while the rut depth decreased by 24%. In addition, based on the analysis of the adhesion, shear lag and bridging effect of STSP, etc., a mechanism of enhancement is illustrated.
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Acknowledgments
This research was supported by the Fund of Jiangsu University Graduate Research and Innovation Program in China (CXZZ12_0117) and the Doctoral Program of Higher Education: Ministry of Education of China (20130092110043).
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 5 • May 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Nov 26, 2013
Accepted: May 12, 2014
Published online: Aug 11, 2014
Discussion open until: Jan 11, 2015
Published in print: May 1, 2015
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