Accession Number : AD0696339

Title :   HIGH MAGNESIA PORTLAND CEMENTS: STUDY OF CEMENT PREPARED WITH COMMERCIAL RAW MATERIALS.

Descriptive Note : Current papers,

Corporate Author : BUILDING RESEARCH STATION WATFORD (ENGLAND)

Personal Author(s) : Rehsi,S. S. ; Majumdar,A. J.

Report Date : OCT 1969

Pagination or Media Count : 11

Abstract : High magnesia Portland cements prepared in the laboratory from low-grade Indian limestones and containing as high as 15 per cent MgO can be made volume-stable by mixing with them suitable quantities of an active silicate material such as pulverised fuel ash. These mixtures pass the ASTM autoclave expansion test and also posess adequate strengths to satisfy the Indian Standard specifications. Pulverised fuel ashes from power stations at Delhi, Bokaro and Durgapur as well as powdered burnt clays were found to be very suitable as additives. Granulated blastfurnace slag from the Rourkela steel plant was found to be unsatisfactory for the purpose of controlling the volume expansion of high magnesia cements. The results correspond very well with those of a previous study in which the stabilisation of cements produced from reagent grade chemicals was investigated. (Author)

Descriptors :   (*CEMENTS, MAGNESIUM OXIDES), STABILIZATION, ADDITIVES, LIMESTONE, CLAY, SILICATES, COMBUSTION PRODUCTS, GREAT BRITAIN

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE