GB 12958-1999
AbolishedComposite portland cement
复合硅酸盐水泥
Application Summary AI generated
GB 12958-1999 specifies the definition, composition, technical requirements, and testing methods for composite Portland cement, which is produced by blending Portland cement clinker with two or more specified mixed materials. This standard is applied in the construction industry for producing cement used in general concrete structures, masonry, and plastering where moderate strength and improved workability are needed, but not for high-early-strength or special exposure conditions. It governs quality control and conformity assessment for cement manufacturers and construction projects in China.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.