GB 175-2023 PDF English
US$145.00 · In stock · Download in 9 secondsGB 175-2023: Common Portland cement Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 175: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 175-2023 | English | 145 |
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Common Portland cement
| Valid |
| GB 175-2007 | English | 105 |
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[Replaced by GB 175-2023] Common Portland cement
| Obsolete |
| GB 175-1999 | English | 239 |
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Portland cement and ordinary portland cement
| Obsolete |
| GB 175-1992 | English | RFQ |
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Portland cement and ordinary portland cement
| Obsolete |
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GB 175-2023: Common Portland cement---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB175-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
CCS Q 11
Replacing GB 175-2007
Common portland cement
Issued on. NOVEMBER 27, 2023
Implemented on. JUNE 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Classification... 6
5 Components and materials... 6
6 Strength grade... 9
7 Technical requirements... 9
8 Test methods... 11
9 Inspection rules... 12
10 Packaging, marking, transportation and storage... 15
Foreword
This document is drafted in accordance with the rules provided in GB/T 1.1-2020
Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents.
This document replaces GB 175-2007 Common portland cements; compared with GB
175-2007, in addition to structural adjustments and editorial changes, the main technical
changes are as follows.
a) Change the provisions on cement components (see 5.1; 5.1 of the 2007 edition);
b) Delete the provisions on natural gypsum of “grade II and above” (see 5.2.2.1 of
the 2007 edition);
c) Change the technical requirements for granulated blastfurnace slag or granulated
blastfurnace slag powder, fly ash, and pozzolanic materials (see 5.2.3, 5.2.4 and
5.2.5; 5.2.3 of the 2007 edition);
d) Delete the provisions on “active mixed materials” and “inactive mixed materials”
(see 5.2.3 and 5.2.4 of the 2007 edition);
e) Change the requirements for limestone and sandstone, and add the inspection
method for methylene blue value (see 5.2.6; 5.2.4 of the 2007 edition);
f) Delete the “kiln dust” material (see 5.2.5 of the 2007 edition);
g) Delete the strength grades of 32.5 and 32.5R for composite portland cement (see
6.3 of the 2007 edition);
h) Add the limit and determination method of water-soluble chromium (VI) (see 7.2
and 8.3);
i) Change the regulations on alkali content (see 7.3; 7.2 of the 2007 edition);
j) Add the requirements for qualified autoclave for soundness and list it as a type
inspection item (see 7.4.2.2 and 9.2.2);
k) Change the 3-day compression strength index of cement of each strength grade
(see 7.4.3; 7.3.3 of the 2007 edition);
l) Change the fineness requirements (see 7.4.4; 7.3.4 of the 2007 edition);
m) Add limits and determination method of cement radionuclides (see 7.5 and 8.9);
n) Change the requirements for component determination (see 8.1; 8.1 of the 2007
edition);
o) Delete the provisions on production capacity below 10×104 t in “Numbering and
sampling” (see 9.1 of the 2007 edition);
p) Change the ex-factory inspection items (see 9.2.1; 9.3 of the 2007 edition);
q) Add type inspection, as well as requirements for inspection frequency and
determination rules (see 9.2.2, 9.3.2);
r) Add requirements for product quality certification materials (see 9.4);
s) Change the regulations on inspection report (see 9.5; 9.5 of the 2007 edition);
t) Change the regulations on acceptance basis (see 9.6.1; 9.6.1 of the 2007 edition);
u) Change the regulations on the inspection agency when quality disputes occur (see
9.6.2, 9.6.3; 9.6.2, 9.6.3 of the 2007 edition);
v) Change the regulations on packaging (see 10.1; 10.1 of the 2007 edition).
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document is proposed and managed by the Ministry of Industry and Information
Technology of the People’s Republic of China.
The previous versions of this document and the documents which are replaced by this
document are as follows.
-- First published as GB 175-1956 in 1956, first revised in 1962, second revised in
1977, third revised in 1985, fourth revised in 1992, and fifth revised in 1999;
-- In the sixth revision in 2007, it incorporated the contents of GB 1344-1999
Portland blastfurnace-slag cement, portland pozzolana cement and portland fly-
ash cement and GB 12958-1999 Composite portland cement (The previous
versions of GB 1344-1999 are. GB 1344-1956, GB 1344-1962, GB 1344-1977,
GB 1344-1985, GB 1344-1992; the previous versions of GB 12958-1999 are. GB
12958-1981, GB 12958-1991);
-- This is the seventh revision.
Common portland cement
1 Scope
This document specifies the classification, components and materials, strength grades,
technical requirements, test methods, inspection rules and packaging, marking,
transportation and storage of common portland cement.
This document applies to common portland cement.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 176, Methods for chemical analysis of cement
GB/T 203, Granulated blastfurnace slag used for cement production
GB/T 750, Autoclave method for soundness of portland cement
GB/T 1345, The test sieving method for fineness of cement
GB/T 1346, Test methods for water requirement of normal consistency, setting time
and soundness of the portland cement
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
3 Terms and definitions
No terms and definitions need to be defined in this document.
4 Classification
Common portland cement is divided into portland cement, ordinary portland cement,
blastfurnace-slag portland cement, fly ash portland cement, pozzolana portland cement
and composite portland cement according to the type and dosage of mixed materials.
The components and codes of each type shall comply with the provisions of 5.1.
5 Components and materials
5.1 Components
The components of common portland cement shall comply with the provisions of Table
1, Table 2 and Table 3, respectively.
5.2 Materials
5.2.1 Portland cement clinker
The hydraulic cementitious material with calcium silicate as the main mineral
component, which is obtained by grinding raw materials mainly containing CaO, SiO2,
Al2O3, and Fe2O3 into fine powder in appropriate proportions, and burning them until
they are partially melted.
5.2.2 Gypsum
5.2.4 Fly ash
Fly ash shall comply with the technical requirements (except for strength activity index
and alkali content) specified in GB/T 1596.The ammonium ion content in fly ash shall
not exceed 210 mg/kg.
5.2.5 Pozzolanic materials
Pozzolanic materials shall comply with the technical requirements (except for the 28-
day compression strength ratio of cement mortar) specified in GB/T 2847.
5.2.7 Cement grinding aids
Grinding aids are allowed to be added during cement grinding, where the amount added
shall not exceed 0.5% of the cement mass. The grinding aids shall comply with the
technical requirements specified in GB/T 26748.
6 Strength grade
6.1 The strength of portland cement and ordinary portland cement is divided into six
grades. 42.5, 42.5R, 52.5, 52.5R, 62.5 and 62.5R.
6.2 The strength of blastfurnace-slag portland cement, fly ash portland cement and
pozzolana portland cement is divided into six grades. 32.5, 32.5R, 42.5, 42.5R, 52.5
and 52.5R.
7 Technical requirements
7.1 Chemical requirements
Chemical requirements shall comply with Table 4.
7.2 Water-soluble chromium (VI) in cement
Water-soluble chromium (VI) in cement shall comply with the requirements of GB
31893.
7.3 Alkali content
The alkali content in cement shall be expressed as the calculated value of w(Na2O) +
0.658w(K2O). When the buyer requires low-alkali cement, it shall be determined
through negotiation between the buyer and the seller.
7.4 Physical requirements
7.4.1 Setting time
The initial setting time of portland cement shall be no less than 45 minutes, and the final
setting time shall be no more than 390 minutes.
The initial setting time of ordinary portland cement, blastfurnace-slag portland cement,
fly ash portland cement, pozzolana portland cement and composite portland cement
shall be no less than 45 minutes, and the final setting time shall be no more than 600
minutes.
7.4.2 Soundness
7.4.3 Strength
The strength of common portland cement at different ages shall comply with the
requirements in Table 5.
7.4.4 Fineness
The fineness of portland cement is expressed in terms of specific surface area, which
shall be no less than 300 m2/kg and no more than 400 m2/kg.
7.5 Limits of radionuclides
The internal exposure index IRa shall not be greater than 1.0, and the external exposure
index Ir shall not be greater than 1.0.
8 Test methods
8.1 Components
Test according to GB/T 12960.During the determination, the measured data shall be
rounded off.
8.2 Insoluble, loss on ignition, magnesium oxide, sulfur trioxide, chloride ion and
alkali content
Perform according to GB/T 176.
8.3 Water-soluble chromium (VI) in cement
Follow the provisions in GB 31893.
8.4 Setting time
Follow the provisions in GB 1346.
8.5 Soundness
8.6 Strength
Perform the strength test method according to GB/T 17671.When testing the mortar
strength of pozzolana portland cement, fly ash portland cement, composite portland
cement and ordinary portland cement mixed with pozzolanic materials, the water
consumption is determined such that the fluidity of mortar is not less than 180 mm on
the basis of 0.50 water-cement ratio.
8.7 Specific surface area
Follow the provisions in GB/T 8074.
8.8 45 μm sieve residue
Follow the provisions in GB/T 1345.
8.9 Radioactivity
Follow the provisions in GB 6566.
9 Inspection rules
9.1 Numbering and sampling
When (or before) cement leaves the factory, it shall be numbered and sampled according
to the same type and strength grade. Bagged cement and bulk cement shall be numbered
and sampled separately. Each number is a sampling unit. The cement factory number is
stipulated as follows according to the annual designed production capacity.
9.2 Cement inspection
9.2.1 Ex-factory inspection
The ex-factory inspection items are 5.1, 7.1, 7.4.1, 7.4.2.1, 7.4.3, and 7.4.4.
9.2.2 Type inspection
The type inspection includes 5.1 and all the content of Chapter 7.In any of the following
cases, type inspection shall be carried out.
9.3 Determination rules
9.3.1 Ex-factory inspection
9.3.2 Type inspection
9.4 Ex-factory of cement
The cement can only leave the factory after it is confirmed that the technical indicators
and packaging quality meet the requirements.
9.5 Inspection report
The content of the inspection report shall include the ex-factory inspection items such
as the document number, cement type, code, factory number, mixed material type and
dosage, as well as density (only for portland cement), water requirement of normal
consistency, type and dosage of gypsum and grinding aids, and other technical
requirements stipulated in the contract, etc.
9.6 Delivery and acceptance
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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