This Singapore Standard1 specifies requirements for the composition and the manufacture of ordinary Portland cement and for the strength, physical and chemical properties of ordinary Portland cement as 'characteristic' Values. Requirements for marking, provision for information, sampling and testing for acceptance at delivery and for special Portland cements are also specified. It specifies the procedures for the manufacturer's autocontrol system to ensure conformity and for the purchaser's assessment of compliance at delivery. This standard specifies requirements for cement as commonly used in Singapore.\n