Experimental Study on the Effects of Addition of Excessive Volume of Fly Ash on Concrete Properties

Abstract:

This paper presents the results of experimental study on the effects of addition of excessive volume of fly ash on the strength characteristics of concrete. Crushed stone aggregate concrete with the replacement ratio of fly ash to Portland cement of 0, 10%, 20%, 30%, 40%, 60% and 80% were tested for compressive strength and modulus of elasticity at the ages of 7 days, 28 days and 91 days. The test result indicated significant reduction in compressive strength with the increase of fly ash content, indication 90% reduction at 80% fly ash replacement. Reduction in modulus of elasticity was found to be less than those of compressive strength, indicating 60% reduction at 80% fly ash replacement.

• Periodical: Applied Mechanics and Materials (Volumes 99-100)
• Pages: 719-722
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.99-100.719
• Online since: September 2011
• Authors: Hong Zhu Quan, Hideo Kasami
• Keywords: Aggregate Gradation, Air Content, Compressive Strength, Fly Ash (FA), Modulus of Elasticity, Replacement Ratio of Fly Ash to Portland Cement, Slump, Strength Reduction

References

[1] Hongzhu Quan, The Effects of Change in Fineness of Fly Ash on Air-entraining Concrete, The Open Civil Engineering Journal, Vol.5, pp.124-131, (2011)

DOI: 10.2174/1874149501105010124

[2] Daily News (Tokyo Morning), 1975. 07.21 (in Japanese)

[3] Japanese Industrial Standard, JIS A 6201-2008, Fly Ash for Use Concrete (in Japanese)

[4] Kobayashi, 'Concrete is dangerous', Iwanami shinsho (in Japanese)