Title:
Fly Ash and Silica Fume Chemistry and Hydration
Author(s):
Della M. Roy
Publication:
Symposium Paper
Volume:
114
Issue:
Appears on pages(s):
117-138
Keywords:
durability; fly ash; hydration; portland cements; silica fume; strength; Materials Research
DOI:
10.14359/1881
Date:
5/1/1989
Abstract:
Hydration of cements containing the supplementary cementing materials fly ash (FA) and silica fume (SF) is discussed and compared with the hydration of ordinary portland cement (OPC). Early stage heats of hydration, changes in the chemistry of the solution (both at early stages, and later pore solution compositions), microstructural development, and pore structure are compared. The hydration rates normally follow the order: SF > OPC > FA. The complex hydration processes may be controlled so that the use of these cements enables development of materials having superior strength and durability.