Effect of Fly Ash on the early Age Cracking Performance of Cement Paste

Ping Zhang; Guan Guo Liu; Chao Ming Pang; Bing Du; Hong Gen Qin

doi:10.4028/www.scientific.net/AMM.584-586.894

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 584-586Effect of Fly Ash on the early Age Cracking...

Effect of Fly Ash on the early Age Cracking Performance of Cement Paste

Abstract:

The X ray computed tomography (X-CT) was applied to test the cracking resistance of cement paste, and the hydration process was monitored to study the effect of fly ash on the early age cracking performance. The results showed that the hydration heat reduced with the increase of fly ash under the same water-cement ratio. Within 24h, the porosity increased with time. The addition of fly ash increased the proportion of large holes and then changed the internal stress state. Using X-CT test method and by comparing the number of cracks, the sample with 20% FA was found to have the most serious cracks, whereas the sample with 30% FA had the best crack resistance.

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Periodical:

Applied Mechanics and Materials (Volumes 584-586)

Pages:

894-898

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.584-586.894

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Online since:

July 2014

Authors:

Ping Zhang*, Guan Guo Liu, Chao Ming Pang, Bing Du, Hong Gen Qin

Keywords:

Early Contraction, Early Cracking, Fly Ash (FA), X-CT

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* - Corresponding Author

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