摘要
在高速公路沥青路面中,水损坏是沥青路面的主要病害之一,也是导致沥青路面早期破坏的主要原因之一.工程实践和研究结果表明,水损坏主要是由于沥青路面的空隙率过大所致,而导致空隙率过大是由于在沥青路面的摊铺过程中,沥青混合料压实质量的不良控制所造成的.因而沥青混合料的压实质量控制至关重要.超声波技术作为一种无损检测的有效方法已成功地被应用在各个工程领域,但在沥青路面工程中的应用还较少见.本文运用超声波技术方法,对沥青混合料的空隙率和压实度进行控制和评价.试验结果表明,超声波方法对于沥青混合料压实度和空隙率的综合评价具有简单、快捷、客观等特点,适于对沥青路面压实施工的在线控制.
Water damage of asphalt concrete pavements has been one of the major distresses in highway engineering. Engineering experience and research results indicate that this damage is due to the extortionate air voids of bitumen mixtures. Paranormal porosity of asphalt mixture is largely the result of the poor controlling of compact degree during paving process. The quality of asphalt pavement is subjected to the controlling methods of compacting of bitumen mixtures. Ultrasonic is an excellent method for non - destructive testing used in various engineering fields. It is also a potentially effective tool to be applied in the control and evaluation of the compaction quality of bitumen mixtures. This paper presents the study results aimed at the applicability of ultrasonic technology for evaluation of porosity and compaction quality of bitumen mixtures. It is shown that this technology, which has been successfully used for many years for evaluation of Portland concrete structures, might be used in asphalt pavement engineering to provide a simple, quick, and objective methodology for control and evaluation of the compact quality of bitumen mixtures. The results of laboratory testing demonstrate the potential of this technology.
出处
《贵州科学》
2007年第B05期263-268,共6页
Guizhou Science
关键词
沥青混合料
水损坏
空隙率
压实度
超声波方法
bitumen mixture
water damage
porosity, compaction , ultrasonic method
