This paper presents the finding from a full-scale accelerated pavement testing study on three flexible pavement test lanes. The three lanes generally varied in their base (or interlayer) and sub-base materials, but had similar hot mix asphalt top layers. The objectives of this study were: (1) to determine the effectiveness of using an untreated reclaimed asphalt pavement (RAP) interlayer in lieu of stone interlayer in a soil-cement asphalt pavement structure; and (2) to investigate the performance of soil cement sub-base layers by varying layer thickness and cement content. The accelerated test was terminated due to severe rutting developed on each of test lanes. The field performance was monitored using Falling Weight Deflectometer (FWD) and DYNAFLECT tests as well as rutting and surface cracking measurements. This study concluded that an untreated RAP interlayer in a soil-cement pavement structure was as effective as the crushed stone interlayer. In addition, the rutting performance of a soil cement layer was found influenced more by layer thickness than by cement content.
Performance Evaluation of Stone and Rap Interlayers in Soilcement Pavements under Accelerated Loading
Seventh International Conference of Chinese Transportation Professionals Congress (ICCTP) ; 2007 ; Shanghai, China
2008-03-21
Conference paper
Electronic Resource
English
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