Concrete Containing Recycled Rubber Steel Fiber

To dispose waste rubber tire is one of the major environmental issue all over the world. Every year large number of tires are buried or discarded all over the world causing a serious threat to the environment. Mostly waste rubber tires are used by some industries as fuel but as we know this kind of waste utilization has hazardous effect and can be uneconomical. Therefore, it is needed to use this kind of waste in a such away so that it might not affect the environment at any cost. This paper presents the use of scrap rubber tires as an alternative to steel fiber in fiber reinforced concrete. Four types of concrete mix were prepared, the test batch and the control batch containing 1 % and 5 % replacement of steel fiber and recycled rubber steel fibers by volume of concrete respectively. W/c was kept constant so that the actual field condition can be replicated that are normally adopted at sites. Results showed a reduced compressive and split tensile strength up to 20% and 14% for 1% replacement of RRSF respectively. For 5% replacement of RRSF a reduction of 38% and 42% was observed for compressive and split tensile strength respectively. It was concluded that for replacement rates up to 1% of RRSF by volume of concrete did influence the compressive and split tensile strength of concrete but the samples with recycled rubber steel fibers has somehow showed ductile behaviour rather than brittle. Such behaviour can prove beneficial for structures that require good impact resistance properties. It is recommended to use such kind of concrete for the construction of light weight concrete structures. 2019 The Authors. Published by Elsevier B.V.