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Title: Hydration of Blended Cements
Authors: Singh, N B
Ojha, Raj Kumari
Issue Date: Jan-2000
Publisher: NISCAIR-CSIR, India
Abstract: Blended cements are made by mixing portland cement clinker and bag house dust in different proportions with granulated blast furnace slag separately. Hydrations are studied in the presence and absence of 5 wt per cent gypsum by employing different techniques. Heat evolution profiles show that blends containing PCC and BHD hydrate in a similar manner but with a different rate and the gypsum contains hemihydrate and anhydrite phases. Free lime determinations indicate that Ca(OH)2 coming out from PCC activate GBFS whereas alkalies other than Ca(OH)2 coming out from BHD are responsible for activating GBFS in BHD-GBFS system. Compressive strength values in both type of blends are comparable.
Page(s): 32-36
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.59(01) [January 2000]

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