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GB/T 4508-2025: Test method for ductility of asphalt
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 4508-2025	English	209	Add to Cart	3 days [Need to translate]	Test method for ductility of asphalt
GB/T 4508-2010	English	169	Add to Cart	3 days [Need to translate]	Standard test method for ductility of bitumen
GB/T 4508-1999	English	239	Add to Cart	2 days [Need to translate]	Standard test method for ductility of bitumen
GB/T 4508-1984	English	RFQ	ASK	3 days [Need to translate]	Test method for ductility of petroleum bitumens

GB/T 4508-2025: Test method for ductility of asphalt

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ICS 75.140 CCSE43 National Standards of the People's Republic of China Replaces GB/T 4508-2010 Asphalt ductility test method Published on 2025-10-05 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 4508-2010 "Determination of Asphalt Ductility". Compared with GB/T 4508-2010, the only changes are structural adjustments and editing. Aside from the sexual alterations, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2010 edition); b) Added terms and definitions (see Chapter 3); c) The instructions regarding test conditions and test result recording have been changed (see Chapter 4, Chapter 3 of the.2010 edition); d) Increased requirements for mold surface roughness (see 5.1); e) The requirements for water bath depth and temperature control accuracy have been changed (see 5.2, 4.2 in the.2010 version); f) The description of the ductility meter has been revised (see 5.3, 4.3 in the.2010 edition); g) Added descriptions of the drying oven and heating equipment for dehydration (see 5.4, 5.5); h) The thermometer scale division requirements have been changed (see 5.6, 4.4 of the.2010 edition); i) The instructions for preparing the release agent have been revised (see 5.7, 4.5 of the.2010 version); j) The support plate material has been increased to stainless steel (see 5.8); k) Additional material requirements have been added (see 5.9); l) Sample preparation has been added (see 6.1); m) The instructions for specimen preparation have been revised (see 6.3, 5.2 of the.2010 version); (n) The conditions for ending the ductility measurement and the requirements during the test process have been changed (see 7.1, 6.1 in the.2010 version); o) The handling method for abnormal ductility measurements has been changed (see 7.3, 6.3 in the.2010 version); p) Increased the precision requirements for the measurement results (see Chapter 8). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Petroleum Products and Lubricants (SAC/TC280). This document was drafted by. China University of Petroleum (East China), Harbin Institute of Technology, CNPC Fuel Oil Co., Ltd. Research Institute, Foshan Municipal Highway Engineering Quality Monitoring Co., Ltd., Gansu Road & Bridge Construction Technology Co., Ltd., and CNOOC Chemical & New Materials Research Institute (Beijing) Co., Ltd., Shandong Provincial Transportation Science Research Institute, and CNOOC Ningbo Daxie Petrochemical Co., Ltd. The main drafters of this document are. Tan Yiqiu, Guo Ning, Li Jun, Liu Jie, Wang Yubo, Shi Jingtao, Huang Honghai, Ma Shijie, Wang Pengfei, and Zhang Xiaoying. Che Jinliang, He Boqian, Yang Yongqian, Wang Zhaoli, Fan Liang. The release history of this document and the document it replaces is as follows. ---First published in 1984 as GB/T 4508-1984, revised for the first time in.1999, and revised for the second time in.2010; ---This is the third revision. Asphalt ductility test method Warning---The use of this document may involve certain hazardous materials, operations, and equipment, but this document does not cover all related hazardous materials, operations, and equipment. Recommendations are provided for all safety issues. Users are responsible for developing appropriate safety and protection measures and establishing relevant regulations before applying this document. Applicability of the restrictions.

1 Scope

This document describes a test method for determining the ductility of asphalt using a ductility meter. This document applies to the determination of ductility in asphalt materials.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 5304 Oven Test Method for Thin Film of Petroleum Asphalt SH/T 0099.4 Determination of Evaporation Residue Content in Emulsified Asphalt SH/T 0099.16 Determination of Residual Content in Emulsified Asphalt (Low Temperature Vacuum Distillation Method) SH/T 0099.17 Determination of Emulsified Asphalt Residue and Distillate Oil Content by Distillation SH/T 0736 Asphalt Rotating Thin Film Oven Test Method NB/SH/T 0890 Test method for low-temperature recovery of emulsified asphalt evaporation residue

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Method Overview The molten sample is poured into a special mold, cooled at room temperature, and then placed in a water bath maintained at the test temperature for further cooling, using a hot knife. Remove the portion of the sample that protrudes above the mold, return the mold to the water bath, and after a certain period of time, transfer it to the ductility tester for testing. Record the asphalt test results. The length at which a specimen breaks when stretched at a certain temperature and speed, or the length at which a specimen reaches the limit of the ductility tester without breaking. The specimen should... The dimensions must conform to those specified in 5.1.Test temperatures may be 25°C, 15°C, 10°C, or 5°C, etc. Unless otherwise specified, the tensile speed is 5 cm/min. min ± 0.25 cm/min. 5.Instruments and Materials 5.1 Mold. The mold shall be designed according to the style given in Figure 1.The specimen mold shall be made of brass and shall consist of two curved end molds and two side mold assemblies. The surface roughness of the inner and outer surfaces of the trial mold is Ra0.63, and the dimensional variation range of the assembly mold is shown in Figure 1. 5.2 Water Bath. The water bath should maintain a temperature change of no more than 0.1℃ during static conditions and no more than 0.5℃ during tensile testing, with a capacity of up to [missing information]. The minimum water bath capacity is 10L. A shelf is provided in the water bath to support the specimen. The distance between the upper surface of the specimen and the minimum water level mark in the water bath, and the distance between the lower surface of the specimen and the water bath level... ...