Comparative Study on Tensile Strength and Impact Load Carrying Capacity of Concrete with Rubber and Steel Fiber

Abstract

Nowadays in this modern world, accidental loads or impact loads were often prone in most structures and in which they tend to fail in a very short span. To counteract this and to increase resistance over these types of loads rubber specifically crushed rubber or crumbed rubber of size less than 5 mm can be used. The purpose of this investigation is to report on an experimental study that explores the effect of using crushed rubber in concrete mixes. Rubber is added by 14% and 18% by the weight of the cement. Physical properties such as density, compressive strength, fresh concrete properties, split-tension, and impact load capacity are examined. The results revealed a decrease in the compressive strength of concrete cylinders containing rubber. The dynamic performance of the rubber concrete is of high importance because of its highly resilient nature, as the rubber particles that are included in the concrete have a positive effect on the dynamic performance. Fibres increase their structural integrity. It contains short discrete fibres that are uniformly distributed and randomly oriented. Fibres include steel fibres, glass fibres, synthetic fibres and natural fibres. In this investigation, crank fibres were taken and added 1% by the weight of the cement. Fibres increase tensile strength and decrease cracks. This project gives a concrete mix which is a combination of cement, sand, coarse aggregate, crumbed or crushed and steel fibres for two Mix grades M20 and M40. And the cured samples after 28 days were tested for compressive strength, Split tensile test and impact tests.