doi:

DOI: 10.3724/SP.J.1249.2019.01074

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2019/36:1 PP.74-79

Influence of rubber asphalt mortar on dynamic modulus of mixture


Abstract:
In order to study the influence of rubber asphalt mortar on the dynamic modulus of asphalt mixture, the rotating shear compaction test is used to determine the skeleton clearance rate by filling the coarse aggregates step by step. The 30% rubber powder modified asphalt mortar with 0.85, 1.00 and 1.10 times of the minimum skeleton clearance volume is assembled into three types of asphalt mixture. The dynamic modulus specimens are prepared by rotating shear compaction test, and the dynamic modulus is measured by asphalt mixture performance test (AMPT). The experimental results show that the rubber asphalt mortar has a significant influence on the dynamic modulus of the mixture. At the same test temperature and loading frequency, the dynamic modulus tends to increase with the increase of asphalt mortar. The Sigmoidal mathematical model is used to fit the dynamic modulus principal curve of the mixture. The fitting correlation coeficients of the three filling rates of coarse aggregate, asphalt mortar and void are 0.998, 0.989 and 0.985, respectively.

Key words:building materials,rubber asphalt,asphalt mortar,asphalt mixture,dynamic modulus,the master curve

ReleaseDate:2019-01-28 09:56:35



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