Asphalt Pavement Compaction Monitoring based on Fiber Grating Sensing Technology

Ioannis Kalpakidis

School of Civil Engineering and Hydraulic, Central State University of New York, NewYork, 12201, USA

Abstract: In order to effectively control the quality of asphalt pavement compaction, its monitoring method was studied.  Strain responses in molding process were monitored by fiber Bragg grating (FBU) sensor in-stalled in the composite rutting plates. Through analyzing the relationship between strain responses and roll-ing times, the compaction process was analyzed. Through loading on rutting plates molded with different roll-ing times using rut meter, strain response law was analyzed to estimate the compaction degree of asphalt mixture.  The results show that strain response variation measured by FBU sensor begins to be gentle after nineteenth compaction in the process of plate molding. At the same time, compaction degree of asphalt mixture approaches the specification requirement, which shows that using FBU sensor to monitor compaction process is feasible. Strain responses of rutting plates with different  compaction degrees in loading test at the same temperature are decreased with the increasing of compaction degree, which has the same trend with the strain variation of corresponding compaction times in molding process.

Keywords: Road engineering; Asphalt pavement; Fiber grating sensing technology; Compaction momtormg; Strain