1.1 This test method provides a means of assessing the sulfate resistance of hydraulic cement and blended hydraulic cement by measuring expansion after immersion in a sodium sulfate solution bars 10 by 10 by 60 mm [0.4 by 0.4 by 2.4 in.] after curing for seven days. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. Some values have only SI units because the inch-pound equivalents are not used in practice. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The current test to determine the sulfate resistance of cement (ASTM C1012) requires at least one year of testing. The new proposed test requires only three months, providing a test result consistent with that of C1012. This test method is suitable to evaluate the effectiveness of portland, hydraulic cements, as well as blended hydraulic cements, for resistance to sulfate exposure. The test is simple and, while it uses special molds, the expansion can be measured using the C1012 comparator with minor modifications.
Keywordshydraulic cement; sulfate resistance
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top