發(fā)布時間：2018-12-07 11:28

【摘要】：為了研究改性瀝青在高溫條件下的粘彈性能,選擇3種改性瀝青在不同溫度下進行多應力蠕變恢復試驗(MSCR)。采用Superpave性能規(guī)范的最新指標對3種改性瀝青的高溫性能進行評價。結果表明:在0.1 kPa時,PE改性瀝青的平均恢復率R100最大,并且不隨溫度發(fā)生較大改變;隨著溫度的升高,SBS、GTR改性瀝青平均恢復率減小;在3.2 kPa時,3種改性瀝青的平均恢復率R3200較為接近;比較兩種應力條件下的結果,在64℃、70℃時,PE改性瀝青由于應力增大,平均恢復率顯著下降,平均不可恢復蠕變柔量Jnr顯著增大;因此,有必要考慮較大應力對改性瀝青性能的影響。本試驗結果與彈性恢復試驗結果一致,可以考慮用MSCR代替彈性恢復試驗。由于采用了較大應力的加載方式以及平均恢復率、平均不可恢復蠕變柔量等評價指標,MSCR能全面評價改性瀝青的性能。
[Abstract]:In order to study the viscoelastic properties of modified asphalt at high temperature, three kinds of modified asphalt were selected to carry out multi-stress creep recovery test (MSCR). At different temperatures. The high temperature performance of three kinds of modified asphalt was evaluated by the latest index of Superpave performance specification. The results showed that the average recovery rate R100 of PE modified asphalt was the largest at 0.1 kPa and did not change with temperature, but the average recovery rate of SBS,GTR modified asphalt decreased with the increase of temperature. At 3. 2 kPa, the average recovery rate of the three modified asphalt R3200 is close. Compared with the results under two stress conditions, at 64 鈩，

本文編號：2367130