彩色沥青技术指标及其耐久性能研究

发布时间：2018-09-17 08:10

【摘要】：给出彩色沥青制备参数,自行制备了红色、黄色、绿色、蓝色4种彩色沥青。对4种沥青的针入度、软化点进行检测,并计算了T1.2和T800,以评定彩色沥青胶结料的高、低温性能。采用RTFOT和PAV试验模拟沥青的短期和长期老化,检测试样老化前后的三原色模式(RGB),定义了色彩鲜艳度指数评定彩色沥青的色泽耐久性。结果表明:染料的掺入使得无色沥青的高温性能得到提高,蓝色沥青增加幅度最大,红色最小;低温抗裂性能变化趋势正好相反;经RTFOT老化和PAV老化后,4种彩色沥青色彩鲜艳度削弱幅度由大到小依次为:蓝色黄色红色绿色。蓝色沥青色泽耐久性最差,绿色沥青色泽耐久性最好;蓝色沥青的色泽老化主要集中短期老化阶段,即混合料生产拌和阶段;绿色沥青老化过程主要集中于长期老化阶段。
[Abstract]:The preparation parameters of colored bitumen were given, and four kinds of colored bitumen, red, yellow, green and blue, were prepared by ourselves. The penetration and softening point of four kinds of bitumen were tested, and T1.2 and T800 were calculated to evaluate the high and low temperature properties of colored bitumen binders. The short and long term aging of asphalt was simulated by RTFOT and PAV tests. The color freshness index was defined by trichromatic mode (RGB), before and after the sample aging to evaluate the color durability of colored asphalt. The results showed that the high temperature performance of colorless asphalt was improved with the addition of dye, the increase of blue asphalt was the biggest, the red was the least, and the change trend of low temperature crack resistance was opposite. After RTFOT aging and PAV aging, the color brightness of four kinds of colored bitumen decreased from big to small as follows: blue, yellow, red and green. The color durability of blue asphalt is the worst, and that of green asphalt is the best; the color aging of blue asphalt is mainly concentrated in the short-term aging stage, that is, the mixing stage of mixture production; the aging process of green asphalt is mainly concentrated in the long-term aging stage.
【作者单位】：湖南大学设计研究院有限公司;
【分类号】：U414

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