Multifunctional materials, often nano- or micro-composites, have gained popularity in civil engineering. Among enhanced functionalities is strain sensing, which can be leveraged to develop durable load sensors. Carbon-based conductive inclusions have shown promising for this application due to enhanced piezo-resistivity. This study investigates multifunctional pavements for structural health monitoring of bridges. The foreseen application is to implement these self-sensing materials on roadway bridges and record weigh-in-motion data to estimate fatigue load accumulation. For that purpose, the authors developed a novel algorithm to perform weigh-in-motion sensing based on measurements collected from smart pavements. Results show that it is possible to integrate the composite materials in pavements in order to perform continuous traffic load monitoring. A novel type of pavement material is fabricated and tested for load sensing performance. Test results show that reliable signals are obtained during compression load tests carried out on plate specimens mimicking a field application, where the load magnitude and rate are detectable using the novel strain sensing pavement material.
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