关键词: 符合性检验, 半圆试件, 动态模量, 相位角, 变异性

Abstract:

As the dynamic uniaxial compression modulus is difficult to use in testing pavement core, the evaluation method based on the design modulus is inapplicable to the compliance examination of pavement quality. In order to solve this problem, a test method for dynamic modulus was proposed based on semi-circular bending specimens, and the corresponding test parameters were determined. Then, the proposed method was used to test the dynamic modulus of common pavement asphalt mixture. The results show that the stress coefficient obtained via the three-di- mension finite element method is of high precision, and that the precision of the tested dynamic modulus is high enough. Moreover, it is found from the variation coefficient of the test data that the proposed method is of good sta- bility due to its weak dispersion and small repeatability deviation.

Key words: asphalt mixture, dynamic modulus, compliance examination, semi-circular specimen, phase angle, variability