ASTM Committee C01 on Cement was formed in 1902. C01 meets twice each year, in June and December, with about 100 members attending over a three-day session. The Committee, with a membership of approximately 380, currently has jurisdiction of over 50 standards, published in the Annual Book of ASTM Standards, Volume 04.01. C01 has 19 technical subcommittees that maintain jurisdiction over these standards. Information on this subcommittee structure and C01's portfolio of approved standards and Work Items under construction are available from the List of Subcommittees, Standards and Work Items below. These standards, together with the standards developed by ASTM Committee C09 on Concrete and Concrete Aggregates and committees of the American Concrete Institute (ACI), are essential to construction of the Nation's civil infrastructure. More