GB/T 9966.5-2020 English PDFUS$119.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 9966.5-2020: Test methods for natural stone - Part 5: Determination of hardness Status: Valid GB/T 9966.5: Historical versions
Basic dataStandard ID: GB/T 9966.5-2020 (GB/T9966.5-2020)Description (Translated English): Test methods for natural stone - Part 5: Determination of hardness Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Q21 Classification of International Standard: 91.100.15 Word Count Estimation: 6,625 Date of Issue: 2020-03-06 Date of Implementation: 2021-02-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 9966.5-2020: Test methods for natural stone - Part 5: Determination of hardness---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Test methods for natural stone--Part 5. Determination of hardness ICS 91.100.15 Q21 National Standards of People's Republic of China Replaces GB/T 9966.5-2001 Test methods for natural stone Part 5. Hardness test 2020-03-06 release 2021-02-01 implementation State Administration of Market Supervision Published by the National Standardization Administration ForewordGB/T 9966 "Test Methods for Natural Stone" is divided into 18 parts. --- Part 1. Compression strength test after drying, water saturation and freeze-thaw cycles; --- Part 2. Bending strength test after drying, water saturation, freeze-thaw cycles; --- Part 3. Water absorption, bulk density, true density, true porosity test; --- Part 4. Wear resistance test; --- Part 5. Hardness test; --- Part 6. acid resistance test; --- Part 7. Hanging strength test of stone pendant combination unit; --- Part 8. Testing the structural strength of stone mounting systems with uniform static pressure difference; --- Part 9. (by measuring the fundamental frequency of resonance) determine the dynamic elastic modulus; --- Part 10. Determination of seismic performance of pendant combination units; --- Part 11. Determination of accelerated aging intensity by chilling and heat; --- Part 12. Determination of static elastic modulus; --- Part 13. Determination of capillary water absorption coefficient; --- Part 14. Determination of resistance to fracture energy; --- Part 15. Determination of aging resistance to salt spray; --- Part 16. Determination of the linear thermal expansion coefficient; --- Part 17. Determination of salt crystal strength; --- Part 18. Lithofacies analysis. This part is Part 5 of GB/T 9966. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section replaces GB/T 9966.5-2001 "Test methods for natural facing stone-Part 5. Shore hardness test method". Headquarters Compared with GB/T 9966.5-2001, in addition to editorial changes, the main technical changes are as follows. --- Added normative references (see Chapter 2); --- Increased the content of the Mohs hardness test method (see Chapter 3); --- The sample drying is changed from 105 ℃ ± 2 ℃ for 24h to 65 ℃ ± 5 ℃ for 48h (see 4.2.3, 4.4.1,.2001 version) 3.3, 5.1); --- Removed the requirement for the gloss value of the sample (see 4.3 in the.2001 edition); --- Added part of the test report (see Chapter 5, Chapter 7 of the.2001 edition). This section is proposed by China Building Materials Federation. This section is under the jurisdiction of the National Stone Standardization Technical Committee (SAC/TC460). This section was drafted. Sinoma Artificial Crystal Research Institute Co., Ltd., Beijing Sinoma Artificial Crystal Research Institute Co., Ltd., Universal Stone (Fu Construction) Co., Ltd. The main drafters of this section. Zhou Junxing, Yu Quan, Gong Yue, Li Wenhong, Liu Wuqiang, Huang Yong. The previous versions of the standards replaced by this section are. --- GB/T 9966.5-1988, GB/T 9966.5-2001. Test methods for natural stone Part 5. Hardness test1 ScopeThis part of GB/T 9966 specifies the principles, instruments and equipment, test samples, test procedures and test results of natural stone hardness testing And test report. This section applies to the determination of the hardness of natural stone.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 17670 unified number of natural stone3 Mohs hardness3.1 Principle Ten kinds of ore were selected as the hardness standard, and the hardness was divided into 10 grades according to the order of hardness (see Table 1) to produce obvious scratches on the sample. The standard minimum grade is the relative hardness of the sample. 3.2 Equipment Mohs hardness tester. 10 kinds of hardness standard minerals, see Table 1. Table 1 Mohs hardness table Hardness grade 1 2 3 4 5 6 7 8 9 10 Ore Name Talc Gypsum Calcite Fluorite Apatite Orthoclase Quartz Topaz Corundum Diamond 3.3 Test samples Three specimens with a length and width of 100mm × 100mm, in which the test surface should be polished into a mirror or fine surface. 3.4 Test procedure Place the sample on a solid, stable support with the facing up. Use different standard scratched ore from small to large. A new cutting edge of the standard scratch ore was used to scribe the surface of the sample vertically. Hold the standard scratch ore while scoring without wrist Move, take the hand holding the standard scratched ore with the translation of the arm, until a clear single-line engraved scratch appears on the surface of the sample. Test The applied force should be moderate, and the edge of the standard scratch ore should not be broken due to excessive force to form double-line or even multi-line scribe marks. Every The sample was scratched four times, and the surface of the sample was scratched visually.The minimum standard hardness level that produced obvious scratches on the sample was used as the sample. Moh's hardness. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 9966.5-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 9966.5-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 9966.5-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 9966.5-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
