ASTM C91/C91M-18 PDF Download

ASTM C91/C91M-18 is a standard specification that covers three types of masonry cement for use in construction where mortar for masonry is required. The specification outlines the physical property requirements that the masonry cement should conform to. It also provides guidelines for sampling the cement and determining various properties such as normal consistency, autoclave expansion, time of setting, and density. The standard specifies that the sand used should be a blend of graded standard sand and standard 20-30 sand. Additionally, the standard includes compressive testing procedures for mortars and guidelines for determining water retention. It is important to note that the standard includes explanatory notes and footnotes, which should be considered as additional information and not as requirements of the standard.