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GB/T 9966.16-2021 English PDF

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GB/T 9966.16-2021: Test methods for natural stone - Part 16: Determination of linear thermal expansion coefficient
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Basic data

Standard ID GB/T 9966.16-2021 (GB/T9966.16-2021)
Description (Translated English) Test methods for natural stone - Part 16: Determination of linear thermal expansion coefficient
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Q21
Word Count Estimation 6,638
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 9966.16-2021: Test methods for natural stone - Part 16: Determination of linear thermal expansion coefficient


---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 16.Determination of linear thermal expansion coefficient ICS 91.100.15 Q21 National Standards of People's Republic of China Natural stone test method Part 16.Determination of Linear Thermal Expansion Coefficient Released on 2021-04-30 2021-11-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

GB/T 9966 "Natural Stone Test Method" is divided into 18 parts. ---Part 1.Compressive strength test after drying, water saturation, 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.Abrasion resistance test; ---Part 5.Hardness test; ---Part 6.Acid resistance test; ---Part 7.Hanging strength test of stone pendant combination unit; ---Part 8.Test method for testing the structural strength of stone hanging system with uniform static pressure difference; ---Part 9.Determine the dynamic elastic modulus by measuring the fundamental frequency of resonance; ---Part 10.Determination of the seismic performance of pendant assembly units; ---Part 11.Determination of accelerated aging strength by chilling and heating; ---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 resistance to salt spray aging; ---Part 16.Determination of Linear Thermal Expansion Coefficient; ---Part 17.Determination of salt crystal strength; ---Part 18.Lithofacies analysis. This part is Part 16 of GB/T 9966. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the China Building Materials Federation. This part is under the jurisdiction of the National Stone Standardization Technical Committee (SAC/TC460). Drafting organizations of this section. Sinoma IOL Research Institute Co., Ltd., Beijing Sinoma IOL Research Institute Co., Ltd., Nan'an City Quality Metrology and Testing Institute, Universal Marble (Fujian) Co., Ltd. The main drafters of this section. Zhou Junxing, Zhong Wenbo, Shen Pengfei, Wu Dawei, Guo Liang Nickel. Natural stone test method Part 16.Determination of Linear Thermal Expansion Coefficient

1 Scope

This part of GB/T 9966 specifies the principle, equipment, sample preparation, test procedure of the linear thermal expansion coefficient test of natural stone Steps, test results and test reports. This section applies to the determination of the linear thermal expansion coefficient of natural stone. Mechanical measurement (method A) is suitable for the largest particle size greater than 7mm stone, thermal dilatometer measurement (method B) is suitable for stone with the largest particle size not greater than 7mm.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 17670 Unified numbering of natural stone

3 Principle

After the sample is dried to a constant weight, measure the length change at at least two different temperatures in a certain direction, and the linear thermal expansion coefficient table between the two temperatures Shown as the amount of change per unit length when the temperature changes by 1°C.

4 Equipment

4.1 Blast drying oven. can keep the temperature at (65 ± 5) ℃. 4.2 Constant temperature box. the temperature can be increased from (20±0.5)℃ to (80±0.5)℃ at a rate of 0.5℃/min, and the temperature can be kept within the range Within at least 2h, the temperature measurement accuracy is at least ±0.5℃. 4.3 Vernier caliper. can be accurate to 0.01mm. 4.4 Micrometer and conversion device (Method A). can be accurate to 0.001mm. 4.5 Thermal dilatometer (Method B). The length measurement accuracy is not less than 0.0005mm, and the temperature measurement accuracy is not less than ±0.1℃.

5 Sample preparation

5.1 Sampling In the same batch of products, at least two samples should be prepared in the same direction, and the length of the sample should be the same as the application direction. There should be no shadows in the sample For various defects that affect thermal expansion, such as cracks, stains, color lines, etc., the two end faces in the length direction of the specimen should be polished smooth. Note. Due to the anisotropy of the rock, the thermal expansion coefficient may change due to different measurement directions. When there are anisotropic surfaces (such as bedding, foliation, etc.) Use two parallel lines to indicate the direction. If you need to measure the thermal expansion coefficient in other directions, prepare the same number of lengths in other directions at the same time as required sample. 5.2 Specimen specifications The size of the cuboid sample for mechanical measurement (method A) is 250mm×50mm×20mm, with a deviation of ±1mm; thermal dilatometer measurement

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