Effect of Citric Acid on Cement Hydration

Bao Guo Ma; Jun Xiao; Hong Bo Tan

doi:10.4028/www.scientific.net/AMR.393-395.49

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 393-395Effect of Citric Acid on Cement Hydration

Effect of Citric Acid on Cement Hydration

Abstract:

Through the test of citric acid of cement paste, setting time and compression strength changes, and combined with XRD, SEM, discusses the influence of citric acid on cement hydration process. The results show that: citric acid can effectively increase the initial cement fluidity, when the content is exceed to 0.1%, the 60 min flow loss of increased gradually. Citric acid retarding effect increases with dosage, but there is a critical dosage, when the dosage is less than 0.1%, the initial setting time and final setting time increased slowly; When the dosage more than 0.1%, the initial setting time increased slowly, but the final setting time increases rapidly; With the increase in citric acid dosage, AFt diffraction peaks increases, while the CH peak decreases, indicating that the citric acid accelerated the initial hydration of C3A, while inhibiting C3S hydration and promoting AFt generation

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Periodical:

Advanced Materials Research (Volumes 393-395)

Pages:

49-53

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.393-395.49

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Online since:

November 2011

Authors:

Bao Guo Ma, Jun Xiao, Hong Bo Tan

Keywords:

Citric Acid (CA), Complexation, Hydration, Resistivity

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