摘要
通过沥青混合料的半圆弯拉与小梁三点弯拉试验,分别得到了在2种试验方法下的沥青混合料力学强度、断裂韧性和疲劳寿命.结果表明沥青混合料的半圆弯拉强度与小梁三点弯拉强度比近似等于1;半圆弯拉试验得到的断裂韧度和延性断裂韧度比小梁三点弯拉试验得到的都要大;半圆弯拉疲劳试验得到的疲劳寿命比小梁三点弯拉疲劳试验得到的小.同时依据变异系数,表明半圆弯拉试验的变异性最小.因此,用半圆弯拉试验表征沥青混合料的力学特性比小梁三点弯拉试验较优越.
According to the ratio of strength,ratio of semi-circular bending strength to small beam three-point bending strength was 1 or so.By fracture toughness test,fracture toughness and delaying fracture toughness gained with semi-circular bending test was bigger than that gained with samll beam three-point bending test.The result of fatigue life test showed that the fatigue life gained by the semi-circular bending test was smaller than that gained with samll beam three-point bending test.At the same time,variation coefficiecy got by semi-circular bending way is smaller than the other.The above results preliminarily determined that semi-circular bending test was better than other to evaluate the related property of the hot mix asphalt concrete.
出处
《武汉理工大学学报（交通科学与工程版）》
2010年第6期1224-1226,1231,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(批准号:50808189)
关键词
半圆弯曲试验
小梁三点弯曲试验
强度比
断裂韧性
疲劳寿命
semi-circular bending test（SCB）
small beam three-point bending test（3-point）
ratio of strength
fracture toughness
fatigue life
