Self-Compacting Concrete – A Review
Ma’Aruf A1, S.I.Abba2, Nuruddeen M. M3
1Ma’Aruf A, Department of Civil Engineering, Kano University of Science and Technology, Wudil Nigeria.
2S.I.Abba, Department of Physical Planning Unit, North West University, Kano Nigeria.
3Nuruddeen M. M, Department of Civil Engineering, Kano University of Science and Technology, Wudil Nigeria.
Manuscript received on 12 March 2017 | Revised Manuscript received on 21 March 2017 | Manuscript Published on 30 March 2017 | PP: 1-7 | Volume-6 Issue-8, March 2017 | Retrieval Number: H2408036817/17©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Concrete is an essential material in the building industry with world consumption estimated close to 25 billion tons every year and it is considered as the widely used material in the world. Concrete is defined in the wider perspective as “ any product or mass made by the use of a cementing medium’’ and the medium is the product of hydraulic cement and water reaction. The shortcoming in conventional concrete such as poor flow faculty and subsequent segregation quandaries leading to poor culminating and delayed construction time led to the development of self-flowing or self levelling concrete. Self compacting concrete (SCC) is a development of conventional concrete, where the use of vibrators for compaction is no more required. Formulating SCCs is a compromise between adequately high fluidity to ascertain good casting and an adequate consistency to eschew phase separations quandaries (segregation or bleeding). SCC mixes must have three important properties: flow under its own weight to completely fill intricate and complex forms, under its own weight the ability to pass through and bond congested reinforcement and high segregation resistance to aggregate. A mix proportion was proposed by Okamura and Ozawa for SCC where the water/powder ration is to be adjusted and aggregate and fine aggregate contents fixed with self compatibility achieved with the addition of plasticizer dosage. The content of the course aggregate is fixed at 50 percent of the total solid volume while the 40 percent of the mortar volume is fixed for the fine aggregate content and 0.9-1.0 water/powder ratio is assumed depending upon the properties of the powder and super plasticizer dosage. Conducting a number of trials determined water /powder ratio. Lack of established mix design procedure yet is one of the limitations of SCC.
Keywords: Self Compacting, Admixture, Super Plasticizer, Viscosity Modifying Agent.
Scope of the Article: Concrete Engineering