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A Study on the Self Compacting Properties of Recycled Concrete Incorporating a New Mix Proportioning Method


Author(s):

Ajith V , Mar Athanasius College of Engineering, Kothamangalam; Praveen Mathew, Mar Athanasius College of Engineering, Kothamangalam

Keywords:

Self Compacting Concrete(SCC), Recycled Coarse Aggregate(RCA), Fresh Properties, Hardened Properties

Abstract:

This paper justifies and encourages the use of recycled coarse aggregate (RCA) as a replacement to normal coarse aggregate (NCA) in the production of self compacting concrete (SCC). The properties of RCA is mainly governed by the presence of residual mortar (RM) content, which is a mixture of cement, sand and water that adheres firmly to the aggregate surface. The physical and mechanical properties of all the materials were carried out. In this study, the mix design is achieved by incorporating most of Indian Standard specifications and mix proportions were arrived through a number of trial mixes by changing and balancing the powder content and water-powder ratio. The NCA has been replaced with RCA at varying amounts of 0%, 50%, 70% and 100%. The properties of all these mixes in fresh state as well as in hardened state are studied. The effects of polypropylene fibres are also studied. The experimental results indicate that the fresh state properties of SCC can be effectively achieved using RCA. In the hardened state, strength of SCC decreases with an increase in recycled aggregate replacement ratios. But the loss of strength seems to be only marginal which highly encourages the use of RCA in the construction industry as a sustainable solution to environmental protection.


Other Details:

Manuscript Id :IJSTEV2I5028
Published in :Volume : 2, Issue : 5
Publication Date: 01/12/2015
Page(s): 38-43
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