Study on the Effect of Waste Gypsum on Hardening Paste Structure and Performances of Lime-Fly Ash
Based on the experiments, the effect of waste gypsum on the formation of paste structure, the early strength and the stability of lime-fly ash is discussed in the article. As is shown by the results, the early strength of paste was improved by adding waste gypsum into lime-fly ash. The stability of lime-fly ash paste modified by waste gypsum could meet technical requirements when waste gypsum admixture was less than 40%. With the increase of hydration age, the number of ettringite (AFt) and C-S-H gel in paste would increase.
J. Y. Sun and Y. D. Xu, "Study on the Effect of Waste Gypsum on Hardening Paste Structure and Performances of Lime-Fly Ash", Advanced Materials Research, Vol. 213, pp. 31-34, 2011