Influence of Mineral Admixtures on the Paste Fluidity of Cement with High Aluminate Phase Content

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Title: Influence of Mineral Admixtures on the Paste Fluidity of Cement with High Aluminate Phase Content

Author(s): E. Maruya, R. Ichinose, and E. Sakai

Publication: Special Publication

Volume: 262

Issue:

Appears on pages(s): 347-356

Keywords: aluminate phase; fluidity; initial heat liberation; limestone powder; mineral admixtures; polycarboxylate superplasticizer.

Date: 10/1/2009

Abstract:
Increasing the aluminate phase content in cement clinker is an effective measure to expand use of various industrial wastes and by-products. Wit h such clinker, it is important to control the fluidity of cement. In this study, we investigated the influence of mineral admixtures on the paste fluidity of cement containing high aluminate phase content. Cement pastes were prepared adding polycarboxylatetype superplasticizer at a 0.32 w/c. Apparent viscosities of the cement pastes were measured with a concentric-cylinder type rotational viscometer. The fluidity of the cement paste containing aluminate phase of 12 mass% was improved by adding 10 mass% of limestone powder, and this improvement was much higher than with other admixtures. The rate of initial heat liberation decreased with the addition of limestone powder, as did the apparent viscosity.