ASTM C1698 – Standard Test Method for Autogenous Strain of Cement Paste and Mortar
This test method measures the bulk strain of a sealed cement paste or mortar specimen, including those containing admixtures, various supplementary cementitious materials (SCM), and other fine materials, at constant temperature and not subjected to external forces, from the time of final setting until a specified age.
This strain is known as autogenous strain. Autogenous strain is most significant in concrete with low water-cementitious materials ratio (w/cm).
autogenous strain; cement paste; length change; mortar