GB/T 5072-2023 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 5072-2023 | English | 265 |
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Refractory products - Determination of cold compressive strength
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| GB/T 5072-2008 | English | 90 |
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Refractories -- Determination of cold compressive strength
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| GB/T 5072.1-1998 | English | 279 |
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Dense, shaped refractory products--Determination of cold compressive strength--Part 1: Referee test without packing
| Obsolete |
| GB/T 5072-1985 | English | 199 |
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Test method for cold crushing strength of dense shaped refractory products
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GB/T 5072-2023: Refractory products - Determination of cold compressive strength---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/GBT5072-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 81.080
CCS Q 40
Replacing GB/T 5072-2008
Refractory Products - Determination of Cold Compressive
Strength
[ISO 8895.2004 Shaped Insulating Refractory Products - Determination of Cold
Crushing Strength; ISO 10059-1.1992 Dense, Shaped Refractory Products -
Determination of Cold Compressive Strength - Part 1.Referee Test without Packing
& ISO 10059-2.2003 Dense, Shaped Refractory Products - Determination of Cold
Compressive Strength - Part 2.Test with Packing, MOD]
Issued on. DECEMBER 28, 2023
Implemented on. JULY 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 Principle... 7
5 Instruments and Equipment... 7
6 Method 1.Compressive Strength of Dense Shaped Refractory Products - Referee
Test without Packing... 9
7 Method 2.Compressive Strength of Dense Shaped Refractory Products - Test with
Packing... 12
8 Method 3.Determination of Compressive Strength of Shaped Insulating Products 13
9 Result Calculation... 14
10 Test Report... 15
Appendix A (informative) Comparison of the Structure Numbers of This Document
with Those of ISO 8895.2004, ISO 10059-1.1992 and ISO 10059-2.2003... 16
Appendix B (informative) Technical Differences between This Document and ISO
10059-1.1992, ISO 10059-2.2003 and ISO 8895.2004 and Causes Thereof... 19
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 5072-2008 Refractory Products -
Determination of Cold Compressive Strength. In comparison with GB/T 5072-2008, apart
from structural adjustments and editorial modifications, the main technical changes are as
follows.
a) The Scope is modified (see Chapter 1; Chapter 1 of Version 2008);
b) In the Principle chapter, “until it is broken or compressed to 90% of the former
height” is modified to “until it is broken or compressed to 90% of the original
height”; “average cross-sectional area under pressure” is modified to “average
pressure surface area” (see Chapter 4; Chapter 4 of Version 2008);
c) Some requirements for the pressure plate are modified, and the content of the note
is modified to the main text (see 5.1; 5.1 of Version 2008);
d) Technical requirements for the micrometer, triangular plate, feeler gauge and steel
ruler are added, and requirements for the hardened filter paper are also added (see
5.2, 5.4, 5.5, 5.8, 5.9);
e) The sampling and preparation contents of the test sample for the test without
packing are added (see 6.1.1, 6.1.2);
f) The content of the note is modified to the main text (see 6.1.4; 6.1.2 of Version
2008);
g) The requirements for the range of the testing machine during the test are deleted
(see 6.2 and 7.3.3 of Version 2008);
h) The test contents of the amorphous test sample are deleted (see Chapters 7 and 8 of
Version 2008);
i) The sampling and preparation requirements of the test sample for the test with
packing are modified (see 7.2.1 and 7.2.2; 7.2.1 of Version 2008);
j) The size of half a standard brick is added [see 7.2.3 d)];
k) “The test sample shall be cut or drilled from the product, and the pressure surface
of the test sample shall be as parallel as possible and as perpendicular to the
pressure direction as possible.” is deleted (see 7.2.4 of Version 2008);
l) The area size of the packing plate is modified (see 7.3.2; 7.3.2 of Version 2008);
m) The content of the note is modified to the main text (see 8.1.2; 8.1.2 of Version
2008);
n) The provisions for test sample size are modified (see 8.1.3; 8.1.3 of Version 2008);
o) The regulations on the number of digits to be retained in the result are modified
(see Chapter 9; Chapter 9 of Version 2008).
This document modifies and adopts ISO 8895.2004 Shaped Insulating Refractory Products -
Determination of Cold Crushing Strength, ISO 10059-1.1992 Dense, Shaped Refractory
Products - Determination of Cold Compressive Strength - Part 1.Referee Test without
Packing, and ISO 10059-2.2003 Dense, Shaped Refractory Products - Determination of
Cold Compressive Strength - Part 2.Test with Packing.
In comparison with ISO 8895.2004, ISO 10059-1.1992 and ISO 10059-2.2003, this
document has many structural adjustments. A table of structure number changes among the
four documents is shown in Appendix A.
In comparison with ISO 8895.2004, ISO 10059-1.1992 and ISO 10059-2.2003, this
document contains many technical differences, which are indicated by a single vertical line (|)
in the outer margin of the clauses involved. A list of these technical differences and causes
thereof is given in Appendix B.
This document makes the following editorial modifications.
--- NOTE 4 of Chapter 8 and NOTE 5 of Chapter 9 in ISO 10059-1.1992 are deleted;
--- NOTE 1 and NOTE 2 of Chapter 5 and NOTEs of 7.1 and 8.4 in ISO 10059-2.2003
are deleted.
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 and shall be under the jurisdiction of National Technical
Committee 193 on Refractories of Standardization Administration of China (SAC/TC 193).
The drafting organizations of this document. Sinosteel Luoyang Institute of Refractories
Research Co., Ltd.; Luyang Energy-Saving Materials Co., Ltd.; Qinhuangdao Shounai New
Materials Co., Ltd.; Zhejiang Jiaji Petrochemical Engineering Co., Ltd.; Zhejiang Jincheng
New Materials Co., Ltd.; Hubei SOLI New Materials Technology Co., Ltd.; Zhejiang
Boomrun Applied Materials Co., Ltd.
The main drafters of this document. Guo Tengfei, Zhang Yi, Lu Xiaokun, Wu Guangjun, Pan
Yongzhong, Zhu Guoping, Liu Wei, Ding Kai, Yang Jinsong, Zhao Shengxiang, Li Xue,
Shao Wenxu, Zhu Yuping, Wang Jie, Ding Junjie, Xu Liang, Ao Ping, Yue Yaohui, Wang
Rongting, Wang Xiaoli, Zhao Yang, Shen Huimin, Wang Liwang, Peng Jingjing, Liang
Zheng.
The previous issued versions of this document and the documents it replaces are as follows.
--- Firstly issued in 1985 as GB/T 5072-1985;
--- Firstly issued in 1998 as GB/T 5072.1-1998 Dense, Shaped Refractory Products -
Determination of Cold Compressive Strength - Part 1.Referee Test without Packing;
--- Firstly revised in 2004 as GB/T 5072.2-2004 Dense, Shaped Refractory Products -
Determination of Cold Compressive Strength - Part 2.Test with Packing;
--- In the second revision in 2008, the contents of GB/T 5072.1-1998 and GB/T
5072.2-2004 are incorporated, and the content of GB/T 3997.2-1998 Shaped
Insulating Refractory Products - Determination of Cold Crushing Strength is also
incorporated (the previous issued versions of GB/T 3997.2-1998 are as follows.
GB/T 3997.2-1983);
--- This is the third revision.
Refractory Products - Determination of Cold Compressive
Strength
1 Scope
This document specifies the principle, instruments and equipment, test samples, test steps,
result calculation and test report of the determination of cold compressive strength for
refractories.
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.
3 Terms and Definitions
The terms and definitions defined in GB/T 18930 and the following ones are applicable to
this document.
A refractory product with a true porosity of less than 45% and a certain size.
A shaped refractory with a true porosity of not less than 45%.
4 Principle
Under specified conditions, a load is applied to a test sample of known size at a constant
pressure rate until it is broken or compressed to 90% of the original height, and the
maximum load is recorded. The cold compressive strength is calculated based on the
maximum load and the average pressure surface area of the test sample.
5 Instruments and Equipment
The pressure plate shall be replaceable for mechanical reprocessing so that its surface meets
the above requirements.
6 Method 1.Compressive Strength of Dense Shaped Refractory Products - Referee Test without Packing
(Arbitration method)
Measure the two perpendicular diameters of the two pressure surfaces of the test
sample to an accuracy of 0.1 mm. According to the arithmetic mean of the four diameters,
calculate the average pressure surface area A0.
7 Method 2.Compressive Strength of Dense Shaped Refractory Products - Test with Packing
Use a vernier caliper to measure the two mutually perpendicular diameters or midlines
of the two pressure surfaces of the test sample, and accurate to 0.1 mm. According to the
average of the four diameters or midline measurements of the two pressure surfaces,
calculate the average pressure surface area A0.
8 Method 3.Determination of Compressive Strength of Shaped Insulating Products
The pressure surfaces of each test sample shall be parallel. Make four height
measurements in the middle of the four sides of the pressure surface, and the deviation
between the measurements shall not exceed 1 mm.
9 Result Calculation
The cold compressive strength of the test sample is calculated according to Formula (1).
10 Test Report
The test report shall include the following contents.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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