Kumar , A and Roy, D M (1988) Pore structure studies of high early strength portland cement containing silica fume. Transactions of the Indian Ceramic Society, 47 (1). pp. 11-15. ISSN 0371-750X

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Abstract

The porosity and pore structure development in high early strength API Class C or ASTM Type III portland cement pastes and mortars during the first 28 days of hydration have been investigated using mercury intrusion porosimetry. The effects of curing at 27° and 60°C and of the replacement of five and 10 wt% of the portland cement by silica fume, an amorphous fine grained silica, on the porosity and pore structure of pastes and mortars have been studied. Pastes and mortars cured at 60°C showed finer pore sizes at all curing ages investigated with an increased porosity for pores in the range of 7500 to 1.9 nm after 7 days of hydration when compared to samples cured at 27°C. The addition of silica fume decreased the median pore size proportionately without significant alteration in the total porosity when compared to the parent material. The reduction in pore size has been considered to be the reason for higher strengths observed in silica fume blended mortars.

Item Type:	Article
Subjects:	Cements, Limes, Plasters
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	25 Nov 2013 12:04
Last Modified:	05 Mar 2016 13:50
URI:	http://cgcri.csircentral.net/id/eprint/2290

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