GB/T 26751-2022 PDF English (GB/T 26751-2011: Older version)
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Ground granulated electric furnace phosphorous slag powder used for cement and concrete
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GB/T 26751-2022: PDF in English (GBT 26751-2022) GB/T 26751-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
CCS Q 12
Replacing GB/T 26751-2011
Ground Granulated Electric Furnace Phosphorous Slag
Powder Used for Cement and Concrete
ISSUED ON: DECEMBER 30, 2022
IMPLEMENTED ON: JULY 1, 2023
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 Composition and Materials ... 6
5 Technical Requirements ... 6
6 Test Methods ... 7
7 Inspection Rules ... 7
8 Packaging, Marking, Transportation and Storage ... 10
Appendix A (normative) Inspection Methods for Activity Index and Fluidity Ratio of
Phosphorous Slag Powder ... 11
Foreword
This document was 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 serves as a replacement of GB/T 26751-2011 Ground Granulated Electric
Furnace Phosphorous Slag Powder Used for Cement and Concrete. In comparison with GB/T
26751-2011, apart from structural adjustments and editorial modifications, the main technical
changes are as follows:
a) The definition of “ground granulated electric furnace phosphorous slag powder” is
modified (see 3.1; 3.1 of Version 2011);
b) The provisions on the addition of gypsum in the composition are deleted, and the
requirements for the sulfur trioxide content index in phosphorous slag powder are
modified (see Chapter 4 and Table 1; 4.2 and Table 1 of Version 2011);
c) The provisions on exit-factory inspection and type inspection are modified (see 7.2
and 7.4; 7.2 and 7.3 of Version 2011);
d) The determination rules are modified (see 7.3; 7.4 of Version 2011);
e) The requirements for the inspection report are modified (see 7.5; 7.4.4 of Version
2011);
f) The provisions on the arbitration and inspection institutions are modified (see 7.6.2
and 7.6.3; 7.5.2 and 7.5.3 of Version 2011);
g) The provisions on the packaging are modified (see 8.1; 9.1 of Version 2011);
h) The requirements for reference cement for activity index testing are modified (see
A.2.1; A.2.1 of Version 2011).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by China Building Materials Federation.
This document shall be under the jurisdiction of National Technical Committee 184 on Cement
of Standardization Administration of China (SAC/TC 184).
The drafting organizations of this document: China Building Materials Academy Co., Ltd.;
China Railway 20th Bureau Group Co., Ltd.; Guizhou Building Materials Product Quality
Inspection and Testing Institute; Wuhan University of Technology; Guizhou Xintianxin
Chemical Co., Ltd.; China Academy of Building Research; China National Chemical
Communications Construction Group Co., Ltd.; Yangjiang Dadi Environmental Protection
Building Materials Co., Ltd.; Northwest Engineering Co., Ltd. of Power China; China Railway
Ground Granulated Electric Furnace Phosphorous Slag
Powder Used for Cement and Concrete
1 Scope
This document specifies the composition and materials, technical requirements, test methods,
inspection rules, packaging, marking, transportation and storage of ground granulated electric
furnace phosphorous slag powder.
This document is applicable to ground granulated electric furnace phosphorous slag powder
used as cement mixing material and concrete admixture (hereinafter referred to as
“phosphorous slag powder”).
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB 175 Common Portland Cement
GB/T 208 Standard Test Method for Cement Density
GB/T 2419 Test Method for Fluidity of Cement Mortar
GB 6566 Limits of Radionuclides in Building Materials
GB/T 6645 Granulated Electric Furnace Phosphorous Slag Used for Cement
GB/T 8074 Testing Method for Specific Surface of Cement - Blaine Method
GB/T 9774 Sacks for Packing Cement
GB/T 12573 Sampling Method for Cement
GB/T 17671 Test Method of Cement Mortar Strength (ISO method)
GB/T 18046-2017 Ground Granulated Blast Furnace Slag Used for Cement, Mortar and
Concrete
GB/T 26748 Cement Grinding Aids
6 Test Methods
6.1 Specific Surface Area
Carry out the test in accordance with the stipulations of GB/T 8074.
6.2 Activity Index and Fluidity Ratio
Carry out the test in accordance with the stipulations of Appendix A.
6.3 Density
Carry out the test in accordance with the stipulations of GB/T 208.
6.4 Phosphorus Pentoxide, Alkali Content, Sulfur Trioxide, Chloride Ion, Loss on
Ignition
Carry out the test in accordance with the stipulations of JC/T 1088.
6.5 Moisture Content
Carry out the test in accordance with the stipulations of Appendix B in GB/T 18046-2017.
6.6 Vitreous Content
Carry out the test in accordance with the stipulations of Appendix C in GB/T 18046-2017.
6.7 Radioactivity
Carry out the test in accordance with the stipulations of GB 6566.
7 Inspection Rules
7.1 Numbering and Sampling
7.1.1 Numbering
Before exiting the factory, phosphorous slag powder is numbered and sampled in accordance
with its grade. Each number is a sampling unit. The exit-factory No. of phosphorous slag
powder, in accordance with the annual production capacity of a single line of phosphorous slag
powder, is specified as follows:
Above 60 104 t, no more than 2,000 t, a number;
30 104 t ~ 60 104 t, no more than 1,000 t, a number;
10 104 t ~ 30 104 t, no more than 600 t, a number;
Below 10 104 t, no more than 200 t, a number.
When the capacity of the bulk transport vehicle exceeds the exit-factory numbered tonnage
specified by the factory, the numbered quantity may exceed the exit-factory numbered tonnage
specified by the factory.
7.1.2 Sampling
Carry out sampling in accordance with the stipulations of GB/T 12573. The sampling shall be
representative and can be continuously conducted. Or equal quantity of samples may be taken
from more than 20 locations, with a total mass of at least 20 kg. The specimens shall be evenly
mixed, and a 5 kg sample of phosphorous slag powder shall be taken out in accordance with
the quartering method.
7.2 Inspection
7.2.1 Exit-factory inspection
The exit-factory inspection items mainly include density, specific surface area, 7-d and 28-d
activity index, fluidity ratio, moisture content, sulfur trioxide content, phosphorous pentoxide
content and alkali content.
7.2.2 Type inspection
The type inspection items are all technical requirements in Chapter 5. The manufacturer shall
conduct type inspection once a year during normal production. At the same time, type
inspection shall also be carried out under one of the following circumstances:
---When there are relatively significant changes in raw materials, fuels or production
processes;
---When new products are trial-produced or production is resumed after a long-term
suspension;
---When the exit-factory inspection results are significantly different from the previous
type inspection.
7.3 Determination Rules
7.3.1 Exit-factory inspection
If the results of the exit-factory inspection comply with the relevant technical requirements in
Chapter 5, they shall be deemed as qualified products. If any one of the inspection results does
not comply with the technical requirements, then, they shall be deemed as disqualified products.
7.3.2 Type inspection
If the results of the type inspection comply with all the technical requirements in Chapter 5,
they shall be deemed as qualified products. If any one of the inspection results does not comply
with the technical requirements, then, they shall be deemed as disqualified products.
7.4 Exit-factory Requirements
Phosphorous slag powder can only be allowed to exit the factory after it is confirmed that the
various technical indicators and packaging comply with the requirements. When exiting the
factory, the manufacturer shall provide the purchaser with relevant materials proving product
quality.
7.5 Inspection Report
The inspection report shall include the implemented standard, code, grade, exit-factory No.,
exit-factory inspection results, type and dosage of grinding aids, and other technical
requirements agreed in the contract. When users have demands, the manufacturer shall send all
test results except the 28-d activity index within 7 days from the date of dispatch of the
phosphorous slag powder. The 28-d activity index shall be reported within 32 days from the
date of dispatch of phosphorous slag powder.
7.6 Delivery and Acceptance
7.6.1 The quality of the phosphorous slag powder product upon delivery can be based on the
inspection results of physical samples, or the manufacturer’s inspection report of the same
number of phosphorous slag powder. The method to be adopted for acceptance shall be agreed
upon by the purchaser and the seller and shall be indicated in the contract or agreement.
7.6.2 When the inspection results of physical samples are taken as the basis for acceptance, the
purchaser and the seller shall jointly take samples, sign and seal before shipment or at the place
of delivery. The sampling method shall comply with GB/T 12573, and the sampling size is 10
kg, divided into 2 equal parts. One shall be kept by the seller for 40 days, and the other shall be
inspected by the purchaser in accordance with the exit-factory items and relevant methods
specified in this document.
Within 40 days, if the purchaser inspects and determines that the product quality does not
comply with the requirements of this document, and the seller has objections, then, the two
parties shall send the other specimen saved by the seller to a building materials product quality
inspection institution mutually recognized by both parties for commissioned inspection.
7.6.3 When the inspection report of the phosphorous slag powder with the same number from
the manufacturer is taken as the acceptance basis, before shipment or at the time of delivery,
the purchaser (or entrusted seller) shall take specimens from the phosphorous slag powder with
the same number, and after being signed and sealed by both parties, they will be kept for 3
months.
Within 3 months, if the purchaser has doubts about the quality of the phosphorous slag powder,
then, the purchaser and the seller shall send the jointly signed and sealed specimens to a building
materials product quality inspection institution mutually recognized by both parties for
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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