Fresh and Hardened Properties of Styrene Butadiene Rubber (SBR) Modified Concrete

Huzaifah Hameed,Muhammad Ahmed Qadri,Osama Bhutta

doi:10.24018/ejers.2020.5.4.1883

Huzaifah Hameed, Muhammad Ahmed Qadri + Show 1 more

Open Access

https://doi.org/10.24018/ejers.2020.5.4.1883

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Abstract

The durability of concrete has been studied ever since it was first used. Researchers have incorporated several materials to make concrete strong and durable. This research focuses on the infusion of styrene butadiene rubber polymer (SBR) as a partial replacement of cement and studies its effects on fresh and hardened properties of concrete. Samples were prepared using partial replacement of SBR in proportions of 0%, 5%, 10% and 20%. Results showed that the fresh density of concrete decreased with the addition of SBR whereas the trends of workability showed an increase with cement replacement. Compressive strength increased at lower percentage replacements however the flexural and tensile strength increased till 15% SBR addition after which it decreased. The total porosity in terms of water absorption decreased which makes SBR modified concrete feasible for concretes exposed to moist conditions and the decreased porosity would increase its durability against chloride induced corrosion.

Highlights

Concrete is the most extensively used building material all over the world
The increased workability gives lower water cement ratio since styrene butadiene rubber polymer (SBR) does not dry in the fresh mix like water [1] .The water tightness of concrete produced as a result of polymer addition is much better and the total ingress of water is lesser than the conventional concrete [2]
The conclusions drawn from the study about the fresh and hardened properties of SBR modified concrete are as follows:

Summary

Introduction

Concrete is the most extensively used building material all over the world. The increasing infrastructure development, internationally, has increased its demand considerably. Since concrete is a heterogeneous material, an effective way to improve its properties is by incorporating admixtures such as secondary raw materials (SRM), polymers, latexes etc. The addition of these additives into cement system administers the maximum usefulness of both materials by making the end product strong and durable. The tensile and flexural strength of SBR modified concrete increases with the increase in polymer content to an optimum value after which it decreases [5],[6]. The sulfate resistance of the hardened concrete is greatly enhanced [8]

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