THOMAS, N.L. and BIRCHALL, J.D., 1983. The retarding action of sugars on cement hydration. Cement and Concrete Research, 13 (6), pp. 830-842.
Sugars retard the hydration of Portland cement. The effectiveness
of different sugars is compared from studies of solution analysis,
calorimetry, calcium binding ability and alkaline stability. The
best retarders, sucrose and raffinose, have a remarkable ability
to solubilize cement constituents and in particular give rise to dramatic increases in the amount of silica in solution. However,
3C and 29Si N.M.R. do not reveal the existence of sucrosesilicate
complexes. The retarding action of sugars is explained in
terms of adsorption onto and poisoning of hydrate surfaces.