Title of article
The influence of pyrogenic nanosilicas with different surface areas and aggregation states on cement hydration
Author/Authors
bagheria, a. k.n.toosi university of technology, تهران, ايران , parhizkarb, t. department of concrete technology, building and housing research center (bhrc), pas farhangian street, sheikh fazlollah express way, ايران , madani, h. graduate university of advanced technology, كرمان, ايران , raisghasemi, a. department of concrete technology, building and housing research center (bhrc), pas farhangian street, sheikh fazlollah express way, ايران
From page
783
To page
796
Abstract
In this study, the pozzolanic activity of pyrogenic nanosilicas with different specific surface areas (90m2/g, 200m2/g and 300m2/g) and aggregation states in lime and cement pastes and their effects on cement hydration have been investigated and compared to the influences of silica fume. The results show very rapid pozzolanic activity for the pyrogenic nanosilicas compared to silica fume and the rate increases with increasing specific surface area of nanosilicas. The large differences in the initial aggregate sizes of nanosilicas appear not to influence their pozzolanic activity. Nanosilicas accelerate cement hydration at early ages, however; at later ages, progress in cement hydration is reduced.
Keywords
Aggregation , Hydration , Pyrogenic nanosilica , Reaction , Stability , Surface area
Journal title
Asian Journal of Civil Engineering (Building and Housing)
Journal title
Asian Journal of Civil Engineering (Building and Housing)
Record number
2546963
Link To Document