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Title: Flexural behavior of RC Beam, Strength and Durability studies of Concrete made with Recycled Concrete Aggregate, M Sand and Different Mineral Admixtures
Authors: Gopalakrishnan, K.M.
Murugesan, Dr. R.
Keywords: Recycled concrete aggregate;Manufactured Sand;Flexural strength;Compressive strength;Fly Ash (FA);Silica fume (SF);Meta kaolin (MK)
Issue Date: Apr-2016
Publisher: NISCAIR-CSIR, India
Abstract: The continuous increasing demand of raw materials in concrete production requires good quality and cost proficient alternate materials like recycled concrete aggregate (RCA - 30%) and Manufactured sand (50%) replacement to natural coarse and fine aggregate. Mineral admixtures Fly Ash (FA), Silica Fume (SF) and Meta kaolin (MK) are also partially replacing to Ordinary Portland Cement (OPC) to appraise the effect on M3O grade concrete with water cement ratio of 0.40. Replacement of these raw materials is an added advantage not only to reduce emission of carbon dioxide and also to protect the depleting natural resources. Introduction of new materials in the construction industry lead to attain good quality aggregates at reasonable prize and provide economical benefits. The compressive, flexural strength and chloride penetrability of the control and the concretes incorporated with FA, SF & MK with water-binder (w/b) ratio of 0.4 shows SF concrete has superior strength development and high resistance to chloride attack. Compressive strength on concrete cubes and flexural strength on prism shows positive approach to the construction field. Flexural strength on reinforced concrete beam with different replacements of SF shows significant result in terms of shear compared to control specimen. Replacements of recycled materials in terms of fine and coarse aggregate, mineral admixtures in cement experiences the better result compared to the design mix which intern assist to use these kinds of materials in normal usage which helps to conserve the natural resources.
Page(s): 556-565
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.45(04) [April 2016]

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