2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

Experimental Study on The Mechanical Properties of Recycled Aggregate Concrete Using Crumb Rubber and Polypropylene Fiber

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Mr. Md. Shahjalal, MIST
Mr. F M Zahid Hossain, University of British Columbia
Mr. Kamrul Islam, Ecole Polytechnique de Montreal (Presenter)
Mr. M. Tiznobaik, University of Manitoba
Dr. Shahria Alam, University of British Columbia

A huge amount of concrete waste is produced every year all over the world due to demolishing old infrastructure. It is a great concern for the disposal of this concrete waste in many part of the world. Using them partly in place of coarse aggregate is one of the methods for constructing sustainable concrete. Comprehensive investigation has been made in this study on the improvement of strength and toughness of concrete having recycle coarse aggregate (RCA) and polypropylene fiber as a partial replacement of natural coarse aggregate (NCA) and cement respectively. Level of RCA replacements are 10% and 30% by weight and fiber are 1% and 2% by volume.  Seven different mixes are considered for this research. The results of the mechanical properties are presented in terms of compressive strength, splitting tensile strength and flexural responses of various fiber reinforced concrete (FRC) with RCA in comparison with control mix. In case of fresh properties, slump value decreases with the incremental replacement level of RCA and fiber while on slump value the effect of fiber is more significant than RCA. The result indicates that compressive strength, splitting tensile strength and flexural strength increase with increasing fiber content. FRC shows more toughness and ductility which indicates that concrete containing fiber provides more warning and energy absorption capacity. Finally, this research opens a new horizon of opportunities for utilizing the structural potential of waste materials in construction industries.