International Journal of Advance Research In Science And Engineering http://www.ijarse.com IJARSE, Vol. No.3, Issue No.9, September 2014 ISSN-2319-8354(E) 344 | Page www.ijarse.com EFFECT OF NATURAL RUBBER LATEX ON NORMAL AND HIGH STRENGTH CONCRETE Vinaya K L 1 , Sanjith J 2 , Ranjith A 3 , Kiran B M 4 1 Post Graduate Student, 2,3,4 Assistant professor, Civil Engineering, Adichunchanagiri Institute of Technology Chikmagalore. Visvesvaraya Technological University- Belgaum, Karnataka (India) ABSTRACT Nowadays the concrete properties are upgraded regarding the fresh and hardened properties by inclusion of new material other than ingredients of concrete, from reducing porosity by compaction, improves the strength of the concrete. In order to increase the usage of latex modified concrete, greater understand about natural rubber latex modified concrete with locally available materials such as cement, fine aggregate, coarse aggregate is essential. This paper illustrates the effect of natural rubber latex addition to the concrete in small increment in the strength. Also the material available locally is also encourages to investigate the properties of natural rubber latex modified concrete. Natural rubber latex is added in small percentages for both normal strength concrete and high strength concrete. In the normal strength concrete, natural rubber latex effect is linearly increases for the particular percentage that is up to the 0.9%. Mechanical strength of the normal strength concrete such as compression, split tensile, flexural strengths were increases there after decreases at 0.9%. Natural rubber latex of same percentage which is added to the normal strength concrete is added to the high strength concrete, here the Natural Rubber Latex effect is not linear as in the normal strength concrete, it increase the strength of both flexure and split tensile as the percentage of natural rubber latex increases but compression strength is observed to increase at 0.3% and then decrement in further addition. Keywords: Normal Strength Concrete, High Strength Concrete I INTRODUCTION The Para rubber which is the only tree can produce the natural rubber latex. the term latex is nothing but a polymer with water based liquid. The word latex by itself does not refer to natural rubber latex. And the dispersion of organic polymer in the concrete at the time of mixing is also known as latex. Rubber trees are initially grown in south America, and then kew garden, UK, then in Sri Lanka, Indonesia, and Singapore .In India first it was grown in Kerala. Nowadays the growth of rubber tree are grown in Karnataka also, so it could be interested experimental to study on natural rubber latex with regarding concrete. Since natural rubber latex improves the compression strength of the concrete and also increase the flexural and tensile strength of the concrete when it is added in small percentages. Since natural rubber latex is formed by a simple monomer combines by reaction that reaction is known as polymerization. The natural rubber latex is added as a polymer admixture to the concrete.