SBM requested that each cement supplier should provide: 

  1. Cement, specified by Type, meeting the requirements of ASTM C 150, C 595 and C 1157;
  2. Mill Tests Reports, with each shipment of cement or bill of lading, that certify conformance to ASTM or AASHTO specifications;
  3. A monthly ASTM C-917 (Cement Strength Uniformity) report by the 15th of the month following the 28-day cube breaks. This report may only be available for a predominant product from a cement source (not available for all product) but provides an indication of the uniformity of product from the source;
  4. An original notarized letter of the Manufacturer’s Certification annually or more often for each product purchased.