Research on the Variation of pH Value of the Ordinary Concrete and Fly Ash Concrete in the Carbonation Process

Abstract:

The accelerated carbonation test was carried out for the ordinary concrete and fly ash concrete. Influences of water-cement ratio, carbonation age and fly ash content on pH value were researched. The results show that carbonation depth, including incomplete carbonized zone, can be effectively reduced by reducing water-cement ratio. So lower water-cement ratio means high performance of resistance of carbonate. The use of fly ash can optimize concrete pore morphology, it’s beneficial for anti-carbonation. However, It disadvantageous to anti-carbonation because of less carbonation material. By taking appropriate mixture of fly ash we can not only enhance the anti-carbonation ability of concrete, but also reduce the use of cement to get well economic benefits.

• Periodical: Advanced Materials Research (Volumes 374-377)
• Pages: 1934-1937
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.374-377.1934
• Online since: October 2011
• Authors: Guang Zheng Qi, Di Tao Niu, Cheng Fang Yuan, Fu Zhen Duan
• Keywords: Concrete, Fly Ash (FA), Incomplete Carbonized Zone, pH Value

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