Title : STUDY ON USE OF MANUFACTURED SAND IN SELF-COMPACTING CONCRETE
Authors : R. Nagendra Technical Director, Civil-Aid Technoclinic Pvt. Ltd, Bangalore 560070 H. Sharada Bai Professor, Faculty of Civil Engineering, UVCE Bangalore University, Karnataka, India
Publication : 23 - 26 October 2013
Volume :
Pages :
Price : 250
Abstract : River sand is becoming a scarce material. Sand mining has to be discouraged so as to save the rivers of our country from total destruction. The use of manufactured sands as a replacement fine aggregate in concrete is receiving increasing attention. In this paper, a study conducted on self-compacting concrete (SCC) made with manufactured sand from four different vertical shaft impact (VSI) crushers is presented. The study includes proportioning of SCC mixes by the particle packing approach, determination of various fresh properties of SCC and determination of both the strength and durability properties of SCC. From the results of the study conducted, it is concluded that SCC made with manufactured sand exceeds the performance of SCC made with natural river sand. This is basically due to the presence of more fines (passing through 600 ?m, 300 ?m, 150 ?m, 75 ?m) in manufactured sand and also results in higher volume paste which in turn improves the performance of SCC mixes with appropriate dosage of PCE based admixtures. Manufactured sand produced from VSI crushers has better particle shape and size resulting in higher packing density as compared to natural river sand. The study concludes that manufactured sand can be used as a full replacement for natural river sand in making SCC mixes.