International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Experimental Study on the Mechanical behaviour of Crumb rubber in High Strength Concrete SREE RAMESWARI A1, CHELLA KAVITHA N2, KRISHNAPRIYA A K3 1PG
Student, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamil Nadu, India 2Assistant Professor, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamil Nadu, India 3PG Student, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamil Nadu, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract – Disposal of waste scrap tire rubber has become a
Metakaolin were usually used to enhance strength in rubberized concrete which exhibits favorable engineering properties, including: the filler effect, the acceleration of OPC hydration, and the pozzolanic reaction.
major environmental problem due to its non-biodegradable nature. Recycling of these waste materials can reduce the accumulation of scrap tire in landfills. A series of laboratory investigations were performed to evaluate the mechanical properties of high strength concrete incorporating discarded tire rubber as aggregate. In this study, scrap tire in the form of crumb rubber was partially replaced for fine aggregates in concrete from 0% to 25% in multiples of 5%. 15% Silica fume and 15% Metakaolin to the weight of total cementitious content were used as property enhancers in high strength concrete. The mechanical properties of high strength concrete like compressive strength, split tensile strength and flexural strength were evaluated. The effect of percentage variation of crumb rubber on compressive strength, split tensile strength and flexural strength were studied.
Trilok Gupta et al. utilized waste rubber tire as a partial replacement of fine aggregate in the form of rubber ash and rubber ash with rubber fibers with three water cement ratios. Workability, compressive strength, flexural strength, density and water absorption (10% rubber ash and varied percentage of rubber fibers) have been obtained. The results showed that compressive strength, flexural strength and density decreases with increase in rubber content. Water absorption of rubber ash concrete was increased with increase in rubber content [1]. Blessen Skariah Thomas et.al investigated an experimental research to analyse the suitability of scrap tire rubber as a partial substitute for natural fine aggregate in high strength cement concrete. Crumb rubber replaced natural fine aggregate from 0% to 20% in multiples of 2.5%. Tests were performed to determine the compressive strength, flexural tensile strength, pull-off strength and water absorption of the concrete samples. The results showed that the compressive strength and flexural tensile strength values were gradually decreasing with increase in the amount of crumb rubber in concrete [2]. Osama Youssf et.al studied the mechanical performance of crumb rubber concrete using silica fume additives. Workability, short term and long term compressive strength and flexural strength were measured. The results showed that slump value increases with increase in rubber content but the compressive and flexural strength were decreased [3].
Key Words: crumb rubber, high strength concrete, compressive strength, split tensile strength, flexural strength, fine aggregate.
1. INTRODUCTION With the rapid development of transportation and industries, a great amount of scrap rubber is produced. Recycling of scrap tire is becoming more important with the global expanding of the environmental problem in order to reduce the accumulation of scrap tire in landfills. The valorization and the recycling of this waste could be a partial solution to pacify the negative environmental impact. Its incorporation into cement concrete is one way of recycling the material. Research shows that using tire rubber in concrete mixtures can inversely affect the compressive strength, flexural strength and workability but Concrete mixed with crumb rubber has better toughness and impact strength than ordinary concrete and also has better heat insulation and sound insulation properties. Also, it can enhance other properties such as crack propagation, energy absorption, ductility and durability. Silica fume, Fly ash and
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In this study, Concrete was designed with water– cement ratio of 0.3. Crumb rubber was incorporated in high strength concrete as a partial replacement for fine aggregate from 0 to 25% in multiples of 5%. Incorporation of crumb rubber decreases the workability of concrete such that super plasticizer (2% to the total cementitious content) was used to enhance workability in concrete. 15% Silica fume and 15% Metakaolin were replaced with the total cementitious
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