GB/T 31057.3-2018 in English
VALIDGranular materials—Physical properties—Part 3:Fluidity index
- Issued on:2018-12-28
- Implemented on:2019-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 31057.3-2018颗粒材料 物理性能测试 第3部分：流动性指数的测量》由TC168（全国颗粒表征与分检及筛网标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Professional interpretation of the fluidity index measurement of granular materials
1. Standard Overview
GB/T 31057.3-2018 "Physical property test of granular materials Part 3: Measurement of fluidity index" standard specifies the terminology, definition, measuring instrument and test method of fluidity index of granular materials. It is applicable to the fluidity index measurement of powder materials with an average particle size of $5~\mu\mathrm{m}{\sim}5~\mathrm{mm}$.
2. Comparison of standard frameworks
| Standard dimensions | Scope of application | Test indicators | Measurement method | Result presentation |
|---|---|---|---|---|
| Angle of repose | Particle size range of 5-50 mm | Flowability evaluation | Funnel method + protractor | Carr index method |
| Compression | Particle size range of 5-50 mm | Compression characteristics evaluation | Bulk density + tap density | Carr Index Method |
| Spatula Angle | 5~50 mm Particle Size Range | Friction Characteristics Evaluation | Vertical Plate Method + Protractor | Carr Index Method |
3. Implementation Suggestions
3.1 Background of Standard Implementation
The flowability index is a key indicator for evaluating the physical properties of granular materials and is widely used in the fields of chemical, pharmaceutical, and food. The formulation of the GB/T 31057 series of standards fills the gap in the field of domestic particle testing.
3.2 Implementation Suggestions
- Equipment Selection:Select instruments that meet the accuracy requirements, such as angle of repose measurement device and tapped density tester.
- Operation Specifications:Strictly follow the steps in the standard to ensure data accuracy.
- Data Analysis:Analyze and interpret the results using the Carr Index Table or Jenike Shear Method.
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