Abstract
A model for reactions that occur in hydrating portland cement is now generally well developed. Incorporation of various by-products to form blended cements modifies both the hydration reactions and the physical properties of the resulting pastes. A review of recent progress in understanding the effects of blending agents on these reactions is presented. The blending agents considered are low-calcium (Class F) fly ash, high calcium (Class C) fly ash, blast furnace slag, silica fume, biosilica and natural pozzolans. Effects of the blending agents on physical properties such as rheology are also considered. Particular attention is given to the essential role of alkalies in pore solutions and the beneficial reactions that occur with high silica content blending agents.
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Glasser, F.P., Diamond, S. & Roy, D.M. Hydration Reactions in Cement Pastes Incorporating Fly Ash and Other Pozzolanic Materials. MRS Online Proceedings Library 85, 167 (1986). https://doi.org/10.1557/PROC-85-167
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DOI: https://doi.org/10.1557/PROC-85-167