Evaluating the Mechanical Properties of Self-Compacting Concrete by Using Bauxite Residue and Waste Plastic as Replacement for Cement and Fine Aggregate
摘要
Owing to the environmental issues associated with industrial waste, i.e. bauxite reside and plastic, it is essential to reuse or recycle it. On the flip side, the utilization of concrete in the construction industry consumes large quantities of cement, which leads to the liberation of greenhouses. In order to decline this effect, bauxite residue and plastic waste can be used in the preparation of concrete. In the current study, the cement content is partially replaced with bauxite residue (i.e. 2.5%, 5%, 7.5%, 10%, and 15%), waste plastic (2.5%, 5%, 7.5%, 10%, and 12.5%) in the place of fine aggregate, and fly ash as filler material are employed. Further, the prepared test specimens were subjected to compressive strength and split tensile strength with a curing period of 3, 7, and 28 days. The test results revealed that bauxite residue of 7.5% and waste plastic of 7.5% offered the highest compressive strength of 61 MPa and split tensile strength of 5 MPa. Overall, the compressive strength and split tensile strength increased up to 15% to 20% when compared to conventional concrete.