Production of low cost self compacting concrete using rice husk ash. | [Proceedings of International Conference on Construction in Developing Countries • 2008]

Author(s):

1. Shazim Ali Memon: National Institute of Technology, National University of Science and Technology, Rawalpindi, Pakistan

2. Muhammad Ali Shaikh: Military College of Engineering, National University of Science and Technology, Rawalpindi, Pakistan

3. Hassan Akbar: Military College of Engineering, National University of Science and Technology, Rawalpindi, Pakistan

Abstract:

Self Compacting Concrete as the name implies is the concrete requiring a very little or no vibration to fill the form homogeneously. Self Compacting Concrete (SCC) is defined by two primary properties: Ability to flow or deform under its own weight (with or without obstructions) and the ability to remain homogeneous while doing so. Flow ability is achieved by utilizing high range water reducing admixtures and segregation resistance is ensured by introducing a chemical viscosity modifying admixture (VMA) or increasing the amount of fines in the concrete. The study explores the use of Rice Husk Ash (RHA) to increase the amount of fines and hence achieve self-compatibility in an economical way, suitable for Pakistani construction industry. The study focuses on comparison of fresh properties of SCC containing varying amounts of RHA with that containing commercially available viscosity modifying admixture. The comparison is done at different dosages of super plasticizer keeping cement, water, coarse aggregate, and fine aggregate contents constant. Test results substantiate the feasibility to develop low cost SCC using RHA. Cost analysis showed that the cost of ingredients of specific SCC mix is 42.47 percent less than that of control concrete.

Page(s): 260-269

DOI: DOI not available

Published: Journal: Proceedings of International Conference on Construction in Developing Countries , Volume: 4, Issue: 5, Year: 2008

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