沥青混合料劲度残留值的影响因素试验

发布时间：2018-03-28 02:34

  本文选题：道路工程　切入点：沥青混合料　出处：《公路交通科技》2014年11期

【摘要】：借助于四点弯曲小梁疲劳试验装置,采用对称循环加载方式,通过加载次数来设置循环,并且在不同的循环次数之间设定相应的恢复时间,研究了多个循环作用下不同的恢复方式、应变大小以及温度的大小与沥青混合料的劲度残留率之间的关系。研究结果表明:小梁在无约束情况时的劲度残留率要大于有约束时的劲度残留率,并且随着循环次数的增加,这两者之间的差值会越来越小。应变越小,则劲度残留率会越大,200με作用下劲度的残留率较大,400με和600με作用下对应的劲度残留率在循环次数少的时候比较接近,随着循环次数的增加,二者之间的差异会明显。温度为5℃和15℃时的劲度残留率比较接近,25℃时的劲度残留率要大于5℃和15℃时的对应的劲度残留率。
[Abstract]:With the help of a four-point bending trabecular fatigue test device, a symmetrical cyclic loading method is adopted, and the cycle is set by loading times, and the corresponding recovery time is set between different cycles. In this paper, the different recovery modes under the action of multiple cycles are studied. The relationship between strain and temperature and the residual rate of stiffness of asphalt mixture. The results show that the residual rate of stiffness of trabecular beam in unconstrained condition is greater than that in constrained case, and with the increase of cycle times, The difference between the two will be smaller and smaller. The smaller the strain, the larger the stiffness residual rate under the action of 200 渭 蔚 and 400 渭 蔚 and 600 渭 蔚 respectively. With the increase of cycle times, the difference between them will be obvious, and the stiffness residual rate at 5 鈩，

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