GB/T 9966.4-2020 in English
VALIDTest methods for natural stone—Part 4:Determination of abrasion resistance
- Issued on:2020-03-06
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 9966.4-2020 |
| Document status: | VALID |
| Title in English: | Test methods for natural stone—Part 4:Determination of abrasion resistance |
| Title in Chinese: | 天然石材试验方法 第4部分：耐磨性试验 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-03-06 |
| Implemented on: | 2021-02-01 |
| Superseding: |
GB/T 9966.4-2001 Test methods for natural facing stones - Part 4: Test method for abrasion resistance
|
| Professional Classification: | GB-National Standard |
| Related Topics: | stone
Natural Stone wear resistance Wear-resistant natural stone test material test Grinding test GB/T 9966.4 GB/T 9966.4-2001 GB/T 9966.4-2020 Test methods for natural stone test Back-up ring wear test |
《GB/T 9966.4-2020天然石材试验方法 第4部分：耐磨性试验》由TC460（全国石材标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Background of Standard Revision and Technological Evolution
GB/T 9966.4-2020 is a comprehensive upgrade of the 2001 version of the standard. The main technical improvements include:
| Technical Dimensions | 2001 Version | 2020 Version |
|---|---|---|
| Test Methods | Disc Wear Method Only | Newly Added Grinding Wheel Grinding Method |
| Equipment Parameters | Disc Diameter Not Clear | 254±1mmStandardized |
| Specimen Requirements | Drying temperature 105℃ | Adjust to 65±5℃ |
Details of core test methods
Disc wear method (method A)
Applicable to raw material testing such as raw materials, key technical parameters:
- Disc speed: 45±1r/min
- Total load: 2000g
- Abrasive flow rate: 60-70g/min white corundum (0.25mm)
Grinding wheel grinding method (method B)
For finished product testing such as composite boards, core innovation points:
Test case of a marble crystallization plate:
A grinding wheel with a diameter of 200±1mm was used, and a constant load of 14kg was applied. The abrasive flow rate was precisely controlled at 4.0±0.1L/min. After the test, the groove width was measured by a digital diameter gauge with an accuracy of 0.05mm.
Implementation suggestions
- The laboratory should establish a test process for abrasive moisture content (required to be <1%)
- For anisotropic stone, the sample direction must be indicated in the report
- Regularly calibrate the abrasive flow device (60s collection volume 4.0±0.1L)
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