GB/T 4509-2010 in English

《GB/T 4509-2010沥青针入度测定法》由TC280（全国石油产品和润滑剂标准化技术委员会）归口，TC280SC4（全国石油产品和润滑剂标准化技术委员会石油沥青分会）执行，主管部门为国家标准化管理委员会。

1 Scope

This standard specifies the needles, containers and other conditions for the determinations of penetrations (0 to 500) 1/10 mm.
This standard is applicable to determination of the penetration of semi-solid and solid bituminous materials with penetrations (0 to 500) 1/10 mm.
Note: For guidance in preparing and testing emulsion residue specimens for this test method, please refer to SH/T 0099.4.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, 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 most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 4507 Standard test method for softening point of bitumen — Ring-and-ball apparatus
SH/T 0099.4 Determination of residue by evaporation of emulsified asphalt

3 Terms and Definitions

For the purpose of this document, the following terms and definitions apply.
3.1
Penetration
Consistency of a bituminous material expressed as the distance in tenths of a millimeter that a standard needle vertically penetrates a sample of the material under known conditions of loading, time, and temperature.

4 Summary of Test Method

The penetration is measured with a penetrometer by means of which a standard needle is applied to the sample under specific load, time and temperature conditions. Where the conditions of test are not specifically mentioned, The total weight of the standard needle, spindle assembly and weights is (100 ± 0.05) g, the temperature is 25℃, the time is 5 s. Other conditions may be used for special testing, such as shown in Table 1:
Table 1