In this work, mixtures simulating 15 and 25% partial replacement of Portland cement by rice husk ash (RHA) were investigated. The evolution of the pozzolanic activity up to 182 days was measured and indicates the existence of remaining calcium hydroxide (CH) in both pozzolanic systems, regardless of the RHA content. However, the reaction rate of the pozzolan was higher in the system with higher CH content. Lime fixed by pozzolanic activity is not dependent on the ratio between CH and pozzolan.
Origin
Federal University Western Bahia, Brazil
Journal Title
J Aust Ceram Soc 53 1920 917-924
Sector
General
Class
G 4640b