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Mechanics in Engineering ›› 2015, Vol. 37 ›› Issue (5): 618-621,606.doi: 10.6052/1000-0879-14-333

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EXPERIMENTAL RESEARCH OF THE WHOLE TENSILE CURVE FOR BITUMINOUS MORTAR

SUN Yazhen1, PAN Jiawei1, WANG Jinchang2, LIU Chang1   

  1. 1 Shenyang Jianzhu University, Shenyang 110168, China;
    2 Institute of Transportation Engineering, Zhejiang University, Hangzhou 310058, China
  • Received:2014-10-14 Revised:2015-01-15 Online:2015-10-15 Published:2015-10-13

Abstract:

In meso-scale, bituminous mixture consists of bituminous mortar, aggregate and voids. The mechanical parameters of bituminous mortar are important parts of meso-scale properties of bituminous mixture and they have very significant effect on the tensile strength. To this end, a loading fixture is designed. Tensile tests for 9 groups of specimens at different loading rate and temperatures are carried out, and the whole tensile curve for bituminous is obtained. From the curve, the maximum tensile stress σmax, the stiffness Knn, and the displacement of failure process U are determined. The parameters obtained are essential to simulate the cracking behavior of bituminous mixture using the cohesive constitutive model.

Key words:

meso-scale|bituminous mortar|whole tensile curve|maximum tensile stress|displacement of failure process

CLC Number: 

  • O348.9