Search result: GB/T 3002-2017 (GB/T 3002-2004 Older version)
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Refractory products -- Determination of modulus of rupture at elevated temperatures
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GB/T 3002-2017
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| GB/T 3002-2004 | English | 90 |
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Refractory products -- Determination of modulus of rupture at elevated temperatures
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GB/T 3002-2004
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| GB/T 3002-1982 | English | 199 |
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Test method for modulus of rupture of refractory products at elevated temperature
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| Standard ID | GB/T 3002-2017 (GB/T3002-2017) | | Description (Translated English) | Refractory products -- Determination of modulus of rupture at elevated temperatures | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q40 | | Word Count Estimation | 8,884 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-08-01 | | Older Standard (superseded by this standard) | GB/T 3002-2004 |
GB/T 3002-2017
Refractory products - Determination of modulus of rupture at elevated temperatures
ICS 81.080
Q40
National Standards of People's Republic of China
Replacing GB/T 3002-2004
Refractory materials - Test method for high temperature bending strength
(ISO 5013.1985, Refractory products-Determinationofmodulusof
ruptureatelevatedtemperature, MOD)
2017-09-07 Posted
2018-08-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 3002-2004 "high temperature refractory refractory strength test method", compared with the GB/T 3002-2004,
The main technical changes are as follows.
--- Reference standard increased GB/T 4513.5, GB/T 4513.6 and GB/T 7321;
--- Increase Note. "For other sizes of the sample, the span can be adjusted accordingly";
--- Removed the provisions of paragraph 5.3.2 and Appendix A of the temperature distribution measurement;
--- Equipment to increase "vernier caliper";
--- Increase "the preparation of shaped products in accordance with GB/T 7321 for";
--- Increase "amorphous refractory preparation in accordance with GB/T 4513.5";
--- Increase "the minimum length of the sample is 100mm, the minimum width and height of 10mm."
--- Increase the "amorphous refractory sample size in accordance with the relevant provisions of GB/T 4513.6 implementation."
This standard uses redrafted Law Amendment uses IS05013.1985 "refractory products high temperature flexural strength test method."
This standard compared with ISO 5013.1985 in the structure there are more adjustments, Appendix A lists the standard and ISO 5013.1985
Section number control list.
This standard compared with ISO 5013.1985 there are technical differences, Appendix B lists the standard and ISO 5013.1985 technology
Sex differences and their causes list.
Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents.
This standard by the National Refractory Standardization Technical Committee (SAC/TC193) and focal point.
This standard was drafted unit. Sinosteel Luoyang Refractory Research Institute Co., Ltd., Zhengzhou Ruitai Refractory Technology Co., Ltd. Beijing Lier
High Temperature Materials Co., Ltd., Zhejiang independent high temperature Technology Co., Ltd.
The main drafters of this standard. Zhang Yi, Cheng Wen Yong, Guo Tengfei, Yang Fan, Yin Mingqiang, Ding Junjie, Li Hexing, Li Longfei, Jiang Dongmei, Chen Weimin,
Zhang Xiaobo, Li Xiang, Zhao Ran, Zhou Yan Dun.
This standard replaces the standards previously issued as.
--- GB/T 3002-1982, GB/T 13243-1991, GB/T 3002-2004.
Refractory materials - Test method for high temperature bending strength
1 Scope
This standard specifies the refractory refractory strength of the test method of the principle, equipment, samples, test steps, the results of calculation and test report
To wait.
This standard applies to shaped and amorphous refractory materials.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4513.5 amorphous refractory materials - Part 5. Preparation and pretreatment of test specimens (GB/T 4513.5-2017, ISO 1927-5.
2012, MOD)
Unshaped refractory materials - Part 6. Determination of physical properties (GB/T 4513.6-2017, ISO 1927-6.
2012, MOD)
GB/T 7321 shaped refractory products sample preparation method
GB/T 8170 rounded repair rules and limit values of the representation and judgment
GB/T 10325 Shaped refractory products sampling inspection rules (GB/T 10325-2012, ISO 5022.1979, NEQ)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Flexural strength modulusofrupture
A sample of refractory strip of a certain size, the maximum stress that can be sustained on a three-point bending apparatus.
3.2
Test temperature testtemperature
The temperature at the midpoint of the specimen tension plane (see 5.3).
4 principle
The sample is heated to the test temperature, incubated to a specified temperature profile, and a constant load rate is applied until the sample breaks.
5 device
5.1 loading device
5.1.1 The loading device shall have two lower blades and one upper blade. The three blades shall be parallel to each other. For the standard specimen two support blade
The distance between (125 ± 2) mm. The upper knife edge should be placed in the middle of the two lower knife edge, accurate to ± 2mm (see Figure 1).
Note. For other sizes, the span can be adjusted accordingly.
......
GB/T 3002-2004
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 81.080
Q 40
Replacing GB/T 3002-1982, GB/T 13243-1991
Refractory Products – Determination of Modulus of
Rupture at Elevated Temperatures
(ISO 5013:1985, MOD)
ISSUED ON: JUNE 9, 2004
IMPLEMENTED ON: DECEMBER 1, 2004
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Definitions ... 5
4 Principle ... 6
5 Equipment ... 6
6 Specimen ... 7
7 Test Procedures ... 8
8 Result Calculation ... 9
9 Test Report ... 10
Appendix A (Normative) Measurement of Specimen Temperature Distribution
... 11
Refractory Products – Determination of Modulus of
Rupture at Elevated Temperatures
1 Scope
This Standard specifies the principle, equipment, specimen, test procedures, result
calculation, test report of the refractory products modulus of rupture at elevated
temperature.
This method is mainly used for shaping and firing refractory products. The chemical
bonded refractory products or unshaped refractory products need pre-treatment; while
the pre-treatment conditions shall be negotiated by relevant parties, and indicated in
the test report.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 8170 Rules of Rounding off for Numerical Values
GB/T 10325 Shaped Refractory Products - Rule of Acceptance, Sampling and
Inspection
3 Definitions
This Standard adopts the following definitions.
3.1 Modulus of rupture
The maximum stress that can be borne by the strip specimen of refractory products
with certain size, while bending on the 3-point bending device.
3.2 Test temperature
and indicate the load when the specimen is broken, the accuracy of indicating value
shall be ±2%.
5.2 Test furnace
5.2.1 The test furnace can heat both the loading device and specimen at the same
time; and uniformly distribute the temperature on the specimen during the testing
period; the temperature difference shall not exceed ±10°C.
5.2.2 For the easily oxidized specimen containing carbon, the atmosphere around
the specimen in the test furnace shall be neutral and reductive; so as to protect the
specimen from oxidation. After test, there shall be no oxidation stain on the specimen
fracture surface and section. To this end, the following measures shall be taken:
-- Use airtight test furnace to inject the pure argon or nitrogen and other protective
gases;
-- Use non-airtight test furnace to cover the specimen by cartridge containing the
graphite powder.
5.3 Temperature measuring device
5.3.1 Use the calibrated thermocouple to measure the temperature nearby the
midpoint of tension surface of the specimen.
5.3.2 The relationship between the measured temperature and the midpoint
temperature of the tension surface of the specimen shall be predetermined, which shall
be regularly inspected according to the procedure listed in Appendix A.
5.3.3 During the test, the midpoint of the tension surface of the specimen shall be
maintained at the test temperature.
6 Specimen
6.1 Quantity
6.1.1 The sampling and quantity of the shaped refractory products shall be
determined as per GB/T 10325; the quantity can also be determined through the
agreement of the both parties.
6.1.2 For the unshaped refractory products, the specimen quantity shall be no less
than 3 per group.
6.2 Shape and size
6.2.1 Normally, the specimen shall be rectangular with cross-section (25±1)mm ×
(25±1)mm, length 150mm; the opposite surfaces in the length direction of the
specimen shall be parallel to each other, the allowable deviation shall not exceed
±0.2mm; the opposite edges on the cross-section shall also be parallel to each other,
the allowable deviation shall not exceed 0.1mm; the surface shall be ensured smooth,
and the corners shall be intact. If other size is adopted, the specimen size change shall
be occurred at the spacing of 5mm.
NOTE: the formula given in 8.1 is only valid for the strip-shaped specimen; therefore, the ratio
between height and weight of specimen, and the ratio between specimen height and spacing
of bearing knife-edges are recommended to be h/b≥1/3, and h/Ls≤1/4 respectively.
6.2.2 The specimen size of unshaped refractory products shall be (40±1)mm ×
(40±1)mm × 160mm.
6.2.3 Use the Vernier caliper to measure the length and width of the middle part of
the specimen at room temperature, accurate to ±0.1mm.
6.3 Specimen preparation
6.3.1 Cut the specimen from the shaped products, if the suppressing direction of the
products is known, take the original brick surface perpendicular to the suppressing
direction as the pressure surface of the specimen; then make mark; while other
surfaces in the length direction shall not have original brick surface.
NOTE:
The continuous flange diamond blade is recommended to be used for cutting.
If the tooth-shaped flange blade is used, the edges cut by the blade are usually broken;
therefore, the surface where the blade entered is recommended to be tension surface.
6.3.2 When using the model-prepared unshaped refractory product specimen, the
side surface during the shaping period shall be regarded as the pressure surface.
6.3.3 In general, the specimen shall be dried to the constant weight at (110±5)°C; for
the easily hydrated specimen, it shall not be cut as much as possible; if it needs wet
cutting, after that use dry cloth to wipe and immediately put it into the blowing dry box
at (110±5)°C to dry to the constant weight; for the products containing carbon, after
wet cutting, immediately put it into the blowing dry box at 40°C below to dry to the
constant weight.
7 Test Procedures
7.1 Heating
7.1.1 The test temperature shall be agreed by the relevant parties, the times of 100°C
is recommended to be used (such as 1000°C, 1100°C…); if necessary, the times of
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