IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 12, Issue 5 Ver. IV (Sep. - Oct. 2015), PP 101-107 www.iosrjournals.org DOI: 10.9790/1684-1254101107 www.iosrjournals.org 101 | Page Used Of Recycled Tyre/Rubber as Course Aggregate and Stone Dust As Fine Aggregate in Cement Concrete Works Mohd Kashif Khan 1 , Bhanu Pratap Singh 2 (Integral University, Department of Civil Engineering, Lucknow, India) 1,2 Abstract: The present investigation aims at the study of properties of concrete in which stone dust is used as a partial replacement for coarse sand and tyre-chips of size 4.7 to 10 mm as partial replacement of coarse aggregate by weight. Keywords: Cement, Coarse sand, Coarse Aggregate, Stone Dust, Tyre Chips size 4.75 to10mm I. Introduction 1.1 General- Sand collected from Aeolian deposit is expensive due to unwanted cost of transportation from natural sources. Large scale exploitation of natural sand creates environmental impact on society. Grit collected from mountains is also expansive due to unwanted cost of transportation from natural sources. 1.2 Methodology- The present investigation aims in the study of properties of concrete in which stone dust is used as a partial replacement for coarse sand and tyre is used as partial replacement of coarse aggregate. Stone dust is replaced at replacement levels of 20percentage, 25percentage, 30percentage, 35percentage and 40percentage. After obtaining maximum strength by sand replacement with stone dust , coarse aggregate is partially replaced by tyre at replacement levels of 2 percentage, 5percentage, and 10percentage II. Literature Review 2.1. Introduction Almost every repair to historic concrete requires the use of concrete. The significance of selecting a suitable concrete, weather for repainting or rebuilding, cannot be underestimated due to the structural and aesthetic roles that concrete plays in concrete construction. Physically inappropriate concrete can cause a repair to fail and can damage the original concrete. Visually inappropriate concrete alters the original intent of the building's designer by changing our perception of the design. For these reasons analysis of historic concrete is a topic of abiding interest to most preservation professionals. In order to fulfill the requirement of fine aggregates and coarse aggregate, some alternative material must be found. 1) Nagraj T.S et.al (1996). [8] , reported that rock dust which have higher surface area consumes more cement in with respect to sand which increases workability. He studied to effect of rock dust and pebble as aggregate in cement and concrete and found that crushed stone dust could be used to replace the natural sand in concrete. 2) Shukla et al. (1998 ) [9] , investigated the behavior of concrete made by partial or full replacement of sand by crushed stone dust as fine aggregate and reported that 40 percent sand can be replaced by crushed stone dust without effecting the strength of concrete. 3) Venugopal (1999) et al. [11] , examined the effect of rock dust as fine aggregate in cement and concrete mixes. They have suggested a method to proportion the concrete using rock dust as fine aggregate. 4) A.K Sahu et al. (2003) [1] investigated the basic properties of conventional concrete and concrete made using quarry dust have compared. They have studied M20 and M30 concretes. Equivalent mixes are obtained by replacing stone dust partially/fully. Test results shows the effective usage of stone dust with same compressive strength, comparable tensile strength and modulus of rupture. Workability of 40percentage replacement of stone dust with 2percentage Superplasticizer is equal to the workability of conventional concrete. Workability is increased by the addition of perplasticizer.as replaced materials to natural sand has become beneficial and is common in the world. Stone dust is manufactured by crushing larger stones of quarry to particular size of sand. Its chemical & physical properties such as color, size & shape, surface texture up particles depend upon types of stone & its source .Use of crushed sand has become a good substitute for natural sand and it has become essential keeping in view of technical, commercial & environmental requirements. Proper quality control while using crushed sand/ manufactured sand can result in better results. Different researchers have carried out research to study the effect of use of crushed sand on properties of mortar.