International Journal of Advanced Research in Civil,Structural,Environmental and Infrastructure Engineering and Developing Volume: 2 Issue: 3 Feb,2016,ISSN_NO: 2320-723X A STUDY ON THE COMPRESSIVE STRENGTH OF DREDGED MARINE SAND CONCRETE Salmabanu Luhar*, Urvashi Khandelwal Research Scholar, Malaviya National Institute of Technology, Jaipur-302017, Rajasthan ABSTRACT: In this study, compressive strength of dredged marine sand concrete have been studied in detail. Two concrete grades were used: M25 and M40. Three different mixes containing 100% natural sand river, 50% natural sand river and 100% replacement of natural sand by dredged marine sand were used. The main aim of the study was to determine that whether or not dredged marine sand can be used as a replacement of fine aggregate in concrete. The result of compressive strength test showed that dredged marine sand provides the concrete with sufficient amount of strength and that it can be used as a substitute of fine aggregate in concrete. KEYWORDS: dredged marine sand, compressive strength, natural sand, concrete 1. INTRODUCTION: Concrete is a basic material for construction of any structure. The sand which is taken generally from quarries or alluvial rivers is a basic ingredient for manufacturing the concrete. But this source of sand is in a state of depletion and their further extraction may cause harmful effects on environment. To counteract this problem some other sources have to be found out and studied as well as experimented. Some of the alternates are dredged marine sand, off shore sand, dune sand, quarry dust and washed soil which also has to be used for replacing the fine aggregate. In this study, Two concrete grades have been used in i.e. M25 and M40. Two types of cements are used in the concrete i.e. OPC and PPC. Three different concrete mixes are taken into consideration for the experiment i.e. Mix-A (concrete made using 100% natural river sand), Mix-B (concrete made using 50% replacement of natural river sand with dredged marine sand) and Mix- C (concrete made using 100%replace-ment of natural river sand with dredged marine sand). The project mainly concentrates on the use of Dredged marine sand (DMS) ISRJournals and Publications Page 112