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

【摘要】：借助于四點(diǎn)彎曲小梁疲勞試驗(yàn)裝置,采用對(duì)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(shí)間,研究了多個(gè)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(shí)的勁度殘留率要大于有約束時(shí)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(huì)越來越小。應(yīng)變?cè)叫?則勁度殘留率會(huì)越大,200με作用下勁度的殘留率較大,400με和600με作用下對(duì)應(yīng)的勁度殘留率在循環(huán)次數(shù)少的時(shí)候比較接近,隨著循環(huán)次數(shù)的增加,二者之間的差異會(huì)明顯。溫度為5℃和15℃時(shí)的勁度殘留率比較接近,25℃時(shí)的勁度殘留率要大于5℃和15℃時(shí)的對(duì)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(hào)：1674400