ASTM C1891-20 PDF Download

ASTM C1891-20 is a standard test method that provides data for assessing compliance with specifications that limit the amount of material retained when sieved on a 45-µm (No. 325) sieve. This test method covers the determination of the fineness of hydraulic cement by using air jet sieving. The procedure involves passing the cement sample through a 45-µm sieve using an air jet sieving apparatus. The amount of material retained on the sieve is then determined and used to assess the fineness of the cement. This standard is useful for ensuring the quality and performance of hydraulic cement by measuring its particle size distribution. It provides a standardized and reliable method for evaluating the fineness of cement, allowing for accurate comparisons and compliance assessment.