本文選題：道路工程　切入點：瀝青混合料　出處：《公路交通科技》2014年11期

【摘要】：借助于四點彎曲小梁疲勞試驗裝置,采用對稱循環(huán)加載方式,通過加載次數(shù)來設(shè)置循環(huán),并且在不同的循環(huán)次數(shù)之間設(shè)定相應(yīng)的恢復(fù)時間,研究了多個循環(huán)作用下不同的恢復(fù)方式、應(yīng)變大小以及溫度的大小與瀝青混合料的勁度殘留率之間的關(guān)系。研究結(jié)果表明:小梁在無約束情況時的勁度殘留率要大于有約束時的勁度殘留率,并且隨著循環(huán)次數(shù)的增加,這兩者之間的差值會越來越小。應(yīng)變越小,則勁度殘留率會越大,200με作用下勁度的殘留率較大,400με和600με作用下對應(yīng)的勁度殘留率在循環(huán)次數(shù)少的時候比較接近,隨著循環(huán)次數(shù)的增加,二者之間的差異會明顯。溫度為5℃和15℃時的勁度殘留率比較接近,25℃時的勁度殘留率要大于5℃和15℃時的對應(yīng)的勁度殘留率。
[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，

本文編號：1674400