Mechanical Properties of Cement-Bitumen Composites for Semi-Flexible Pavement Surfacing
DOI:
https://doi.org/10.3846/bjrbe.2014.24Keywords:
cementitious grouts, superplasticizer, open-graded asphalt skeletons, cement-bitumen composites, workability, compressive strength, semi-flexible pavementAbstract
Semi-flexible pavement surfacing is a composite pavement that utilizes the porous pavement structure of the flexible bituminous pavement, which is grouted with an appropriate cementitious material. The main objective of this study is to investigate the mechanical properties of cement-bitumen composites as an alternative semi-flexible pavement surfacing material. This involves the selection of acceptable proportions of cementitious grouts as well as the development of cement-bitumen composites. The findings showed that by replacing 5% of the cement with silica fume (with adequate amount of superplasticizer) there is improvement in compressive strength and tensile stiffness modulus. In addition, resistance to abrasion is improved.References
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