Research on Durability of High Volume Fly Ash Concrete

Abstract:

The paper presents the results of series of experimental studies on effects of the type and replacement ratio of fly ash to portland cement on durability of concrete. Specimens made from 28 mixes of fly ash concrete with water binder ratio of 38% to 60% and with replacement ratio of fly ash of 25% to 70% and 5 mixes of portland cement concrete with water cement ratio of 38% to 75% were tested for compressive strengths, drying shrinkage, carbonation and resistance to freezing and thawing. As a results, drying shringkage decreased with fly ash addition regardless of type and replacement ratio of fly ash. Carbonation increased with fly ash replacement ratio, and type 1 fly ash showed higher carbonation. Type 1 and tpye 2 fly ashes showed practically no change in durability factor after 300 cycles of freezing and thawing up to 55% replacement, while type 4 fly ash showed rapid reduction in durability factor up to 40% replacement ratio.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 380-383
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.380
• Online since: May 2012
• Authors: Hong Zhu Quan
• Keywords: Carbonation, Drying Shrinkage, Durability, Fly Ash (FA), Freezing and Thawing, Replacement Ratio

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] Hongzhu Quan, Hideo Kasami. Effects of Change in Fineness of Fly Ash on Air-entrained Concrete. Advanced Materials Research, Vols. 168-170, pp.2195-2199, (2011)

DOI: 10.4028/www.scientific.net/amr.168-170.2195

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

[4] Neville, A., Properties of concrete, 3rd edition, pp.391-395, Longman Scientific & Technical, (1981)