This standard specifies the definitions, requirements, test methods and inspection rules of the masonry cement.
This standard is applicable to masonry cement.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 176 Method for Chemical Analysis of Cement (GB/T 176-1996, eqv ISO 680: 1990)
GB/T 203 Granulated Blast furnace Slag Used for Cement Production
GB/T 1345 Test Method for Fineness of Cement--The 80μm Sieve
GB/T 1346 Standard Test Method for Water Requirement for Normal Consistency Setting Time and Soundness of the Portland Cement (GB/T 1346-2091, eqv ISO 9597: 1989)
GB/T 1596 Fly Ash Used for Cement and Concrete
GB/T 2419 Test Method for Fluidity of Cement Mortar
GB/T 2847 Pozzolanic Materials Used for Cement Production
GB/T 5483 Gypsum and Anhydrite (eqv ISO 1587: 1975)
GB/T 6645 Granulated Electric Furnace Phosphorous Slag Used for Cement Production
GB 9774 Sacks for Packing Cement
GB 12573 Sampling Method of Cement
GB 12958-1999 Composite Portland Cement
GB/T 17671-1999 Method of Testing Cements--Determination of Strength (ISO Method) (idt ISO 679: 1989)
JC/T 417 Granulated Ferrochromium Slag Used for Cement
JC/T 418 Granulated Blast Furnace Titanium Slag Used for Cement
JC/T 454 Granulated Calcium Enriched Liquid Slag Intended to Be Used in Cement
JC/T 667 Processing Additions for Use in the Manufacture of Hydraulic Cement
JC/T 742 Rotary Kiln Dust Used in Cement
JC/T 853 Clinker of Portland Cement
YB/T 022 Steel Slag Used for Cement
3 Definitions and Codes
The masonry cement refers to the hydraulic cementing materials with better working performance grinded and thinned by adding adequate Portland cement clinker and gypsum into the cement admixture(s), given with a code of M.
4 Usage
Masonry cement is mainly adopted for masonry and plastering mortar as well as blinding concrete and it is not applicable to structural concrete.
5 Composition and Materials
5.1 Composition
The mass percent of mixed materials in cement shall be greater than 50%, adequate amount of limestone or kiln dust is allowed to be mixed into the cement..
5.2 Cement admixtures
It refers to the mixed materials specified in GB/T 203, GB/T 1596, GB/T 2847, GB/T 6645, JC/T 417, JC/T 418, JC/T 454, JC/T 742 and YB/T 022, as well as the active admixtures newly-applied according to Appendix A of GB 12958-1999, and the aluminium oxide in limestone shall not exceed 2.5%.
