USE OF BUILDING DEMOLISHED WASTE AS COARSE AGGREGATE IN POROUS CONCRETE

Shivakumar M. N, Nithin K.S, B.M Gangadharappa

Abstract: Titanic quantities of construction and demolition wastes are generated every year in developing countries like India. The disposal of this waste is a very serious problem because it requires huge space and very little demolished waste is recycled or reused. In this experimental study, the utilization of building demolished waste in the manufacturing of Porous concrete as a replacement of coarse aggregate. The mechanical properties of the concrete have been investigated for nominal mix and mix design as per the mix design codes IS 10262-2009 and IS12727:1989. Porous concrete is no fines concrete with desired degree of compressive strength with high porosity to allow permeability. Various proportions of cement, water and percentage of coarse aggregates and building demolition wastes are used. In this paper 40:60, 50:50 and 60:40 ratio of coarse aggregate and building demolition wastes are used with water cement ratio 0.4 to 0.48. 28 days cube compressive strength of average of three samples are determined. During the study, lesser density by weight and compressive strength from 5.22 MPa to 8.32 MPa are observed as per IS 12727: 1989 for the ratio 1:10 and 1:12 respectively. By the investigation it is found that the porous concrete results are encouraging to use as a porous material for the drainability and has been found to be comparable to the conventional concrete.

Keywords: Porous concrete, building demolished waste, cube compressive strength, coarse aggregate

DOI: https://doi.org/10.15623/ijret.2014.0306108