T/JSJTQX 04-2019 Active Group standards

T/JSJTQX 04-2019 SBS-modified asphalt multi-stress creep recovery test (MSCR) protocol

Publish Date: 2019-07-29 Implement Date: 2019-08-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSJTQX 04-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Highway protection and maintenance

ICS Name: Integrated Road Engineering

Publish Date: 2019-07-29

Implement Date: 2019-08-01

Scope

Scope: This procedure specifies the purpose and scope of application of the MSCR test for SBS modified asphalt, the technical requirements for instruments and materials, test steps, analysis, calculation, and report recording. This procedure is applicable to the performance testing of SBS modified asphalt in all stages of design, construction, maintenance, and quality inspection of highway asphalt pavements in Jiangsu Province. The performance testing of SBS modified asphalt in other grade asphalt pavements can be carried out with reference to this procedure. Main technical content: Modified asphalt is a typical viscoelastic material with creep and deformation recovery characteristics. The multi-stress repeated creep test can reflect the cumulative deformation of asphalt materials under the conditions of repeated unidirectional loading and unloading. Through extensive experimental research, it has been shown that the MSCR test has a good screening effect on the differences in quality performance of modified asphalt caused by changes in the quality of base asphalt, the amount of modifier added, and the quality of modifier. However, there is a lack of standardized methods for this test in China. Through research on test instruments and equipment, test conditions, and test steps, and extensive consultation with 14 units, the project team has formulated the MSCR test procedure for SBS modified asphalt, which specifies the requirements for test instruments and equipment, test conditions, test steps, data analysis and calculation, and test reports, as follows: Test instruments and equipment: Dynamic shear rheometer test system; Test conditions: The test temperature is determined according to the PG high-temperature grade standard of asphalt; Test steps: The test adopts a repeated loading method, with a total of 30 loading cycles. Under a stress level of 0.1kPa, the first 10 loading cycles are used for sample adjustment and no data need to be recorded. Under a stress