摘要
为了研究天然沥青与集料之间的黏附性,选用2种基质沥青与3种集料,在基质沥青中分别掺入不同剂量的天然沥青,采用光电比色法测试沥青与集料的黏附性,并与水煮法试验结果作对比,建立两种方法对应的黏附率与黏附等级的联系,同时通过浸水马歇尔试验与冻融劈裂试验研究了沥青混合料的水稳定性.试验结果表明,光电比色法可以定量分析沥青与集料的黏附性,并且从黏附性角度能更为精确地确定天然沥青的最佳掺量;在基质沥青中掺入天然沥青能明显增加沥青与集料的黏附性能,但不同的基质沥青与集料在添加天然沥青后对其黏附性的提高程度各异;水煮法试验、浸水马歇尔试验及其冻融劈裂试验的结果验证了光电比色法试验结果的可靠性.
In order to know the adhesion between natural asphalt and aggregate, two types of base asphalts and three kinds of typical aggregates were selected. The adhesion between asphalt and aggregate were tested using photoelectric colorimetric method with different doses of natural asphalt into base asphalt. The test results were compared with that of boiling method. And the relation between adhesion rate and adhesion level was estab- lished. Meanwhile water stability of asphalt mixture through immersion Marshall test and freeze-thaw splitting test were studied. Test results indicate that asphalt-aggregate adhesion can be analyzed quantitatively by photoelectric colorimetric method, and the optimal dosage of natural bitumen can be determined more accurately from the standpoint of adhesion. The adhesion may be improved significantly after base asphalt mixed with natural asphalt. But the improving degree is different with different base asphalt and aggregate. The test results of boiling method, immersion Marshall test and freeze-thaw splitting test verified the reliability of photoelectric colorimetric method.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2015年第3期77-81,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(51108038
51108039)
陕西省科技计划项目(2013KW24
2013kjxx-94)
关键词
道路工程
天然沥青
集料
光电比色法
黏附性
road engineering
natural asphalt
aggregate
photoelectric colorimetric method
adhesion
