GB/T 1463-2005 in English

《GB/T 1463-2005纤维增强塑料密度和相对密度试验方法》由TC39（全国纤维增强塑料标准化技术委员会）归口，主管部门为中国建筑材料联合会
本标准规定了采用浮力法及几何法测定纤维增强塑料密度及相对密度的设备、试样、试验步骤、计算、试验结果和试验报告。本标准适用于纤维增强塑料的板状、棒状、管状和模压试样的密度与相对密度的测定。它包括浮力法和几何法两种试验方法。浮力法适用于吸湿性弱的材料，几何法适用于吸湿性强的材料。可按材料特点及有关各方的协议选用。

Test methods for density and relative density of fiber reinforced plastics

1 Scope

This standard specifies the equipment, specimens, test steps, calculations, test results and test reports for determining the density and relative density of fiber reinforced plastics by buoyancy method and geometric method.

This standard is applicable to the determination of density and relative density of plate-shaped, rod-shaped, tubular and molded specimens of fiber reinforced plastics. It includes buoyancy method and geometry method. Buoyancy method is suitable for materials with weak hygroscopicity, while geometric method is suitable for materials with strong hygroscopicity. It can be selected according to the characteristics of materials and the agreement of the parties concerned.

Note: Materials with weak hygroscopicity refer to those that do not affect buoyancy measurement precision due to hygroscopicity.

This standard does not apply to materials with density less than 1,000 kg/m3.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition applies.

GB 1446-2005 Fiber-reinforced plastics composites - The generals for determination of properties

3 Terms and definitions

For the purpose of this standard, the following terms and definitions apply.

3.1
density
mass of material per unit volume at t℃

 
3.2
relative density
ratio of the mass of a certain volume of material to that of reference substance of the same volume at the same temperature
or ratio of the density of a substance to that of a reference substance

4 Principle

4.1 Buoyancy method

According to Archimedes principle, the specimen volume is calculated by buoyancy. The mass of the specimen in the air divided by its volume is the density of the specimen material.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Equipment
6 Materials
7 Specimen
8 Test steps
9 Calculation
10 Test result
11 Test report