Detail of GB 175-2007/XG2-2015

Introduction of GB 175-2007/XG2-2015

GB 175-2007/XG2-2015 Common portland cement, includes Amendment 2 1 Scope This national standard specifies that common portland cements’ compositions, materials specifications, strength levels, technical specifications, test methods, test rules, packaging, marking, transportation, storage, etc.. This national standard is applicable to common portland cements. 2 Normative Reference The following normative documents contain provisions which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the normative document referred to applies. GB/T176 Methods for chemical analysis of cement (GB/T176-1996, eqv ISO680:1990) GB/T203 Granulated blastfurnace slag used for cement production GB/T750 Autoclave method for soundness of portland cement GB/T1345 The test sieving method for fineness of cement (sieve processing method) GB/T1346 Test methods for water requirement of normal consistency,setting time and soundness of the portland cement (GB/T1346-2001, eqv ISO9597:1989) GB/T1596 Fly-ash used for cement and concrete GB/T2419 Test method for fluidity of cement mortar GB/T2847 Pozzolanic materials used for cement production GB/T5483 Gypsum and hard gypsum GB/T8074 Cement’s specific surface area test method (Blaine) GB9774 Package bag of cement GB12573 Cement’s sampling GB/T12960 Examination of cement’s composition of certain amount GB/T17671 Test method for the cement mortar’s strength level (ISO method) (GB/T17671-1999, idt ISO679:1989) GB/T18046 Ground granulated blast furnace slag used for cement and concrete JC/T420 Chemical analysis method of chloride in cement materials JC/T667 Cement’s grinding aids JC/T742 Rotary Kiln ash blended in cement 3 Terms and Definitions The following terms and definitions are applicable to this national standard. Common Portland cement: It is a kind of cement matrix composed of Portland cement clinkers and appropriate gypsum, plus specified admixture. 4 Classifications Common Portland cement specified in this national standard include Portland cement, ordinary Portland cement, slag Portland cement, Portland-Pozzolana cement, Fly-ash Portland cement and composite Portland cement. Compositions and codes of all kinds should comply with specifications in Article 5.1.

Contents of GB 175-2007/XG2-2015

1 Scope 2 Standard reference 3 Terms and definitions 4 Classifications 5 Composition and material 5.1 Composition 5.2 Materials 5.2.1 Cement clinker of Portland cement 5.2.2 Gypsum 5.2.3 Active admixture 5.2.4 Non-active admixture 5.2.5 Kiln ash 5.2.6 Grinding aids 6 strength level 7 Technical specifications 7.1 Chemical Indicators 7.2 Alkali content 7.3 Physical requirement 7.3.1 Setting time 7.3.2 Soundness 7.3.3 Strength level 7.3.4 Fineness (selective indicator) 8 Test method 8.1 Composition 8.2 Insoluble substance, loss on ignition, magnesium oxide, sulfur trioxide and alkali content 8.3 Autoclave method for soundness 8.4 Chloride ion 8.5 Water requirement of normal consistency, setting time and soundness of the portland cements 8.6 Strength level 8.7 Specific surface 8.8 80 μm and 45 μm sieve residue 9. Test rules 9.1 Serial number and sampling 9.2 Cement’s being delivered out of factory 9.3 Factory inspection 9.4 Criterion rule 9. 9. 9.5 Inspection report 9.6 Delivery and acceptance 10. Package, marking, transportation and storage 10.1 Package 10.2 Marking 10.3 Transportation and storage