%0 Journal Article
%T Evaluation of the Fresh and Hardened Properties of Steel Fibre Reinforced Self-Compacting Concrete Using Recycled Aggregates as a Replacement Material
%A N. Nalanth
%A P. Vincent Venkatesan
%A M. S. Ravikumar
%J Advances in Civil Engineering
%D 2014
%I Hindawi Publishing Corporation
%R 10.1155/2014/671547
%X In this world of rapid urbanization the demand for natural construction materials is increasing day by day which has created a necessity for alternative construction materials. Recycling of materials is a possible way of eradicating the acute shortage of materials. Considerable work has been done in the area of self-compacting concrete by partial replacement of coarse aggregates (CA) with recycled coarse aggregates (RCA) obtained from construction and demolition debris. The present study has been done by adding steel fibers to concrete in a view of improving the mechanical properties of SCC so that it can be applied in beam column joints. An ideal mix proportion was arrived at, as a result of repeated trials and specimens that were cast and cured. The compression, tensile, and flexural strength parameters were determined and the result has been presented. The results obtained reveal that brick bats in combination with steel fibres may be used extensively in SCC. 1. Introduction Self-compacting concrete as we all know is a concrete which exhibits good flow properties, good passing ability, and segregation resistance. No vibration is required to compact the concrete since the SCC has the capability of compacting under its own weight after being placed. Also SCC effectively passes through the congested reinforcements and uniformly fills up the voids. The SCC thus obtained is dense and homogeneous and has superior surface finish [1¨C3]. In order to attain the above said properties, chemical admixtures like superplasticizers and viscosity modifiers are generally used. The dosage of the chemical admixtures is an important parameter which influences the fresh state properties of SCC. Many research works carried out in this area have proved that the role of chemical admixtures is inevitable in achieving good fresh state properties of SCC [4¨C6]. The effectiveness of high calcium fly ash for producing SCC was investigated in this work. The fresh and hardened properties of SCC using recycled aggregates by adding suitable proportion of chemical admixture and fly ash have been studied in this work [7¨C9]. In addition this study was carried out by adding steel fiberĄ¯s to SCC. The brief literature reviews of some of the latest studies are as follows. Reference [10] studied the fresh and hardened properties of SCC using recycled concrete aggregates as both coarse and fine aggregates states. Three series of SCC mixtures were prepared with 100% coarse recycled aggregates, and different levels of fine recycled aggregates were used to replace river sand. The cement content
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