Continuous health monitoring of pavement systems using smart sensing technology

Investigation of design alternatives for hydronic snow melting pavement systems in China

Early, effective and continuous monitoring allows to reduce costs and to extend life of road infrastructure. For this reason, over the years, more and more efforts have been made to implement more advanced and effective monitoring systems at ever more contained costs, going from impractical manual and destructive methods through automated in vehicle equipment to the most recent wireless sensor network (WSN) embedded into the pavement. The purpose of this paper is to provide a comprehensive, up-to-date critical literature review of wireless sensor networks for pavement health monitoring, considering, also, the experience gained for wired sensor as fundamental point of reference. This work presents both the methodology used to collect and analyse the current bibliography and provides a description and comments fundamental characteristics of wireless sensor networks for pavement monitoring for damage detection purposes, among which energy supply, the detection method, the hardware and network architecture and the performance validation procedures. A brief analysis of other possible complementary applications of smart sensor networks, such as traffic and surface condition monitoring, is provided. Finally, a comment is provided on the gaps and possible directions that future research could follow to allow the extensive use of wireless sensor networks for pavement health condition monitoring.

Structural health monitoring of asphalt pavements using smart sensor networks: A comprehensive review

Considering the mechanical effects and the different paths for transferring deformation, optical fiber sensors commonly used in civil engineering have been systematically classified. Based on the strain transfer theory, the relationship between the strain transfer coefficient and allowable testing error is established. The proposed relationship is regarded as the optimal control equation to obtain the optimal value of sensors that satisfy the requirement of measurement precision. Furthermore, specific optimization design methods and priority design parameters of the classified sensors are presented. This research indicates that (1) strain transfer theory-based optimization design method is much suitable for the sensor that depends on the interfacial shear stress to transfer the deformation; (2) the priority design parameters are bonded (sensing) length, interfacial bonded strength, elastic modulus and radius of protective layer and thickness of adhesive layer; (3) the optimization design of sensors with two anchor pieces at two ends is independent of strain transfer theory as the strain transfer coefficient can be conveniently calibrated by test, and this kind of sensors has no obvious priority design parameters. Improved calibration test is put forward to enhance the accuracy of the calibration coefficient of end-expanding sensors. By considering the practical state of sensors and the testing accuracy, comprehensive and systematic analyses on optical fiber sensors are provided from the perspective of mechanical actions, which could scientifically instruct the application design and calibration test of industrialized optical fiber sensors.

Priority design parameters of industrialized optical fiber sensors in civil engineering

Experimental investigation on dynamic response of asphalt pavement using SmartRock sensor under vibrating compaction loading

Quality control of asphalt pavement compaction using fibre Bragg grating sensing technology

Long-term thermal analysis of an airfield-runway snow-melting system utilizing heat-pipe technology

In order to solve the problem that the present evaluation system gives no consideration on accelerating aging effect of ultraviolet radiation for asphalt binder,authors compared the ultraviolet aging with thermal aging for five kinds of asphalts by comparison tests,dynamic shear rheometer(DSR) test,bending beam rheometer(BBR)test and infrared adsorption spectrum analysis.Results show that asphalt has different sensitivities between thermal aging and ultraviolet aging condition.The ultraviolet aged asphalts' compositiors on penetration,softening point and ductility tests don't accord with thermal aged asphalts'.Utraviolet aging and thermal aging give asphalt different influences,theological property changes greatly after ultraviolet aging.Inner reason of anti-ultraviolet aging ability of different kinds of asphalts is determined by aging reaction degree.Aromatic blend and resin are two main influence factors of asphalt anti-ultraviolet aging ability.Therefore,evaluation result based on thermal aged asphalt may not reflect asphalt anti-ultraviolet ability exactly,and ultraviolet aging research is necessary in the intensive ultraviolet radiation region.

Ultraviolet Aging Mechanism of Asphalt Binder

Experimental and numerical analysis of the critical heating strategy for hydronic heated snow melting airfield runway

Volumetric properties are essential for a better understanding of how to design the mixtures. Due to the irregularity of aggregate shape, these properties vary randomly with the same gradation. In this paper, the volumetric properties [bulk specific gravity (γf), air voids (VV), voids in mineral aggregate (VMA), and voids filled with asphalt (VFA)] were determined on two mixtures types, namely, A and B. These mixtures were statistically analyzed using different distribution methods. Seventy-two samples of Mixture A and 52 of Mixture B were fabricated using the Marshall design method. Results of the study showed that the Weibull distribution could reflect the probability distribution law of the volumetric properties of the mixtures. The two-parameter Weibull distribution function appears to be more appropriate or use with γf and VFA, whereas the three-parameter Weibull distribution function was most appropriate for VV and VMA. The analysis of test results also revealed that there are significant differences in the volumetric properties of the two mixtures tested at the same confidence level. The confidence interval decreases with a decrease in reliability.

Xu Huining

Papers

Quality control of asphalt pavement compaction using fibre Bragg grating sensing technology

Long-term thermal analysis of an airfield-runway snow-melting system utilizing heat-pipe technology

Ultraviolet Aging Mechanism of Asphalt Binder

Experimental and numerical analysis of the critical heating strategy for hydronic heated snow melting airfield runway

Is Normal Distribution the Most Appropriate Statistical Distribution for Volumetric Properties in Asphalt Mixtures