基于正交设计法的橡胶沥青性能试验研究

发布时间：2018-01-24 17:55

  本文关键词： 道路工程 橡胶沥青 正交试验 评价指标 加工因素　出处：《公路交通科技》2017年02期 　论文类型：期刊论文

【摘要】：为提高橡胶沥青的性能,依托河北廊沧高速公路建设工程,针对当地气候特征及材料性状,借助正交试验优选橡胶沥青的9种正交组合,并研究了胶粉掺量、胶粉目数、沥青型号对橡胶沥青3大指标的规律性影响。此外,采用老化试验和布氏黏度试验,评价了拌和时间以及拌和温度对橡胶沥青老化前后性能的影响程度。研究结果表明:橡胶沥青正交试验各因素的显著性顺序为:胶粉掺量基质沥青型号胶粉目数;拌和时间和拌和温度对橡胶沥青老化性能影响显著,因此在制备橡胶沥青的过程中需合理控制时间和温度;选取90#、60目、胶粉含量为20%的橡胶沥青,在190℃的环境下拌和60 min,能使橡胶沥青达到最佳性能;建议橡胶沥青的性能评价指标以5℃延度和180℃黏度为主,针入度和软化点为辅。
[Abstract]:In order to improve the performance of rubber asphalt, based on the construction project of Hebei Langcang expressway, according to the local climate characteristics and material properties, 9 orthogonal combinations of rubber asphalt were selected by orthogonal test, and the content of rubber powder was studied. In addition, aging test and Brinell viscosity test were used. The effects of mixing time and mixing temperature on the properties of rubber asphalt before and after aging were evaluated. Rubber powder content matrix asphalt type rubber powder number; The effect of mixing time and mixing temperature on the aging performance of rubber asphalt is significant, so it is necessary to control the time and temperature reasonably in the process of preparing rubber asphalt. The rubber asphalt with 90 mesh and 20% rubber powder was mixed at 190 鈩，

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