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With the adoption of the new standard ASTM Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution (C 1012-89), it is now possible to evaluate the performance of mortars made with portland cements, blended cements, and blends of portland cement with pozzolans or slags in producing a sulfate-resisting cement mortar.
This paper is a summary of three cooperative interlaboratory testing programs conducted by ASTM Subcommittee C01.29 on Sulfate Resistance with the aim to develop a performance test method and establish its precision.
Parallel to these programs, other tests were conducted at several laboratories from industry, government agencies, and universities that participated in the Subcommittee's programs or conducted research work on their own.
Data are presented showing the expansions of the mortar bars measured at ages up to one year using both ASTM methods C 1012 and C 452. From this work valuable data were generated to conclude the suitability of both methods and propose expansion limits for the acceptance of moderate and high sulfate-resisting hydraulic cements.
Corporate chief chemist, Dundee Cement Co., Holnam, Inc., Dundee, MI
Stock #: CCA10549J