摘要
通过对沥青混合料的半圆弯拉强度与间接拉伸强度再次试验，得到了半圆弯拉与间接拉伸的强度比为2—3倍左右，并与小梁三点弯拉试验强度相比较，得到了两者的强度比为1左右；进一步对间接拉伸与小梁三点弯拉试验强度进行比较，得到了与半圆弯拉与间接拉伸的强度比相同的结论．比较了半圆弯拉试验与小梁三点弯拉试验的断裂韧性，及三者试验方法得到的疲劳寿命，试验结果表明半圆弯拉试验得到的断裂韧性比小梁三点弯拉的偏大；半圆弯拉试验得到的疲劳寿命介于间接拉伸与小梁三点弯拉试验得到的之间．进一步分析试验结果的变异系数，表明半圆弯拉试验的变异性最小．
Through test strengths of two semi-circular bending （SCB） and indirect tensile test （IDT） methods, it was concluded that ratio of SCB to IDT strengths was 2 to 3 times, and more ratio of the SCB strength to small beam three-point bending （3-Point B） strength was about 1 time. Their fatigue lifes obtained by three experimental methods were compared, and fracture toughness and delaying fracture toughness of the SCB is bigger than the one of the 3-Point B,while fatigue lifes of the SCB is between the one of the other two ways. At the same time, variation coefficient of the SCB is smaller than the one of other two kinds of methods. Hence, SCB is very effective method for evaluating the performance of the hot mix asphalt concrete.
出处
《大连交通大学学报》
CAS
2010年第1期59-63,共5页
Journal of Dalian Jiaotong University
基金
国家自然科学基金资助项目(50808189)
