Study of Compressive Strength of High Volume Fly Ash Concrete with Varying Proportion of Fly Ash and Silica Fume

International Journal of Civil Engineering

© 2016 by SSRG - IJCE Journal

Volume 3 Issue 3

Year of Publication : 2016

Authors : Srila Dey

10.14445/23488352/IJCE-V3I3P102

How to Cite?

Srila Dey, "Study of Compressive Strength of High Volume Fly Ash Concrete with Varying Proportion of Fly Ash and Silica Fume," SSRG International Journal of Civil Engineering, vol. 3,  no. 3, pp. 3-6, 2016. Crossref, https://doi.org/10.14445/23488352/IJCE-V3I3P102

Abstract:

Concrete is the most widely used construction material in the world. Fly Ash utilization is a global thinking as its addition to cement concrete supplements for durable concrete. Then the high volume fly ash has been used in many high rise buildings, industrial structures, water font structures, concrete roads and rolled compacted concrete dams. Addition of silica fume and Super plasticizer to high volume fly ash concrete found to increase the strength properties. Fly ash improves the quality of concrete, leading to the increased service life of concrete structures. Concretes having large amounts of fly ash (usually from 50%) are termed as high-volume fly ash (HVFA) concrete. Silica fume, which is found to be more reactive than the fly ash and it significantly, improves the strength of concrete. In the present investigation, an attempt is made to study the effect of compressive strength of high volume fly ash concrete with varying proportion of silica fume and fly ash. Cement is replaced by fly ash and silica fume 50 to 80% and 0 to 15% by weight respectively. The compressive strength development of silica fume modified high-volume fly ash mixes immersed in water up to 7 to 45 days is reported. As the water content is low in high volume fly ash concrete, the bleeding is very low and often negligible. Setting time is little longer than that of conventional concrete. This is because of low cement content, low rate of reaction and high content of super plasticizer. The investigation revealed that by maintaining a constant dosage of high performance super plasticizer along with fly ash and silica fume, it is possible to maintain a optimum slump value i.e. workability, thereby satisfying most of the modern structural applications. Also the isolated effect of silica fume on the high volume fly ash concrete with a water cement ratio of 0.40 has been studied. The results indicate that there is a remarkable increase in the compressive strength of concrete on replacement of cement by silica fume and fly ash and also obtained 10% replacement of silica fume by cement on high volume fly ash concrete gives higher compressive strength in the present investigation. This document gives formatting instructions for authors preparing papers for publication in the Proceedings of an SSRG International Journals Journal. The authors must follow the instructions given in the document for the papers to be published. You can use this document as both an instruction set and as a template into which you can type your own text.

Keywords:

Cement, Compressive strength, Fly ash, High volume fly ash concrete, Silica fume, Super plasticizer, Workability.

References:

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