International Conference on Advancements in Computing & Management (ICACM-2019) April 13-14, 2019 | Jagannath University, Jaipur, India Page 313 Effect of Waste Tyres as Partial Replacement of Fine Aggregate in Concrete for Construction Nazish Parvez a , Jitendra Khatti b , Dr. K. S. Grover c a M.Tech. Scholar, Civil Engineering, University Department., RTU, Kota b Ph.D. Scholar, Civil Engineering, University Department, RTU, Kota c Professor, Civil Engineering, University Department, RTU, Kota A R T I C L E I N F O Article history: Received 26 January19 Received in revised form 01 March19 Accepted 01 April 19 Keywords: Compressive Strength, Fine Crumb Rubber, Flexural Strength, Split Tensile Strength A B S T R A C T The aggregate is major part of concrete besides cement. Coarse aggregate may be formed by crushing of stones and fine aggregates are obtained from river bed or weathering of rocks into dust. In present time, the waste tyres are becoming major problem in the world. The waste tyres may be reused in land filling because it decomposed very slowly and take over a century to disintegrated at ambient temperature. For the reduction or reuse of waste tyres, these tyres rubber are cut into small and large pieces. Crumb rubber (C.R.) is prepared by cutting of waste tyres. The large pieces are considered as coarse crumb rubber and small pieces are considered as fine crumb rubber, those are replaced with coarse aggregate and fine aggregate respectively in concrete. In this research paper, crumb rubber of tyres waste reduced to very fine size has been used a fine aggregate. The quantity of crumb rubber is based on the percentage weight of fine aggregate as 2.5%, 5.0%, 7.5% and 10.0% replacement. The concrete mix M20 and M25 are used for casting cubes, beams and cylinders for various laboratory tests. Variation in slump, compressive strength, flexural strength, split tensile strength tests are conducted in laboratory for M20 and M25. From study, it is found that strengths are reducing with increasing percentage of crumb rubber. © 2019ICACM. Hosting by SSRN. All rights reserved. Peer review under responsibility of International Conference on Advancements in Computing & Management. 1. Introduction Concrete material is widely used material in construction industry and development due to urbanization. In concrete design 70% to 80% natural aggregates are used. In other hand, numerous industries are producing waste material on large scale which creating health issues. For reducing health hazard problems, these industrial wastes are used in concrete design. Ashes, GGBS, slag of different metals and dust of rocks may be used with concrete. From 1992, the use of waste materials came as application of waste material in civil engineering. Similarly, the waste tyres also came into application of waste material. Over time, waste tyres rubber has come a common material in civil engineering. Now, waste tyres material are commonly used in concrete and mortar as bonding material. [1] Veerendra kumar C khed et.al. (2018) studied the effect of different size of C.R. on flowability and strength of hybrid fibre reinforced cementitious composite. From results, they observed that fine size CR gives better workability with high strength. Compressive strength is decreased with increase of workability. [2] Nagham Tariq Hamad Al – Shafii et.al. (2018) investigated the effect of 5%, 10% and 15% CR in concrete with replacement by sand. The prepared concrete specimen for 3, 7 and 28 days curing and testing. They reported that 10% CR gives optimum results of strength. They also investigated that flexural strength and split tensile strength is decreased with increase CR. [3]Bhavik Bhatt et.al. (2017) carried out experiments with crumb rubber material as sand replacement with the concept that natural sand is depleting. In the experiments, M25 grade of concrete was designed and percentage of replacement of sand was 2.5%, 5.0%, 7.5% and 10.0% by weight. It was observed that water absorption is directly proportional to percentage of crumb rubber. It is also observed that flexural strength is increasing up to 5% CR. It is reported that compressive strength is increased up to 10% of CR. Electronic copy available at: https://ssrn.com/abstract=3444788