Sjon van Dijk starts testing RFID sensors in asphalt

11 June 2015

Sjon van Dijk, a civil engineering student at the University of Twente is currently working on his final year bachelor project. His project focuses on the application of RFID sensors in the asphalt construction process.  He is based at the Asaflt Central Hengelo for laboratory testing and will conduct site testing with BAM Wegen.

The ASPARi developed PQi methodology currently utilizes technologies such as GPS, laser linescanners and infrared cameras to monitor key process parameters during construction such as asphalt mix temperature and compaction. The technologies are very accurate with meaningful visualizations produced and useful analyses drawn from the results. However, using these new technologies on a construction site is considered to be expensive, invasive and rather labour intensive. The recent rapid development of Radio Frequency Identification Tags (RFID) sensors has promise for monitoring process parameters in the laboratory and during construction.  RFID sensors generally not bigger than the largest aggregate size, will be tested to assess whether they can be used as an alternative to the current sensors used to measure asphalt cooling rates and compaction pressure. RFID uses wireless electromagnetic fields to transfer data, for the purposes of automatically identifying and tracking tags attached to objects. By placing these sensors into the asphalt mixture, temperature and pressure can be measured during laboratory testing and construction, but also during usage and maintenance of the road where additional RFID sensors can be added to measure weather conditions and other long-term parameters. In a first step, Sjon will assess the suitability of RFID sensors for use in various asphalt mixtures. He will work on two issues during his project viz. the placement of the sensors in the asphalt and assessing whether the sensors are able to work effectively at the higher temperature ranges.




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