The result “Optimization of Engineered Cementitious Composites (ECCs) with self-sensing materials” is a patented, self-monitoring Engineered Cementitious Composite (ECC) containing recycled carbon fibre and biochar fillers, which measures electrical impedance to monitor the structural integrity of concrete during its service life, thereby optimising safety and maintenance costs.

The structural integrity of building materials during their service life is pivotal. Therefore, monitoring structural health has become a prerequisite to maximize the safety of artifacts and minimize maintenance costs. 

The tool contributes to increasing resilience against environmental hazards through real-time data and early warning systems.

Structural Health Monitoring (SHM) can be performed with Non-Destructive Techniques (NDTs) such as using self-sensing materials and related measurement system(s). Self-sensing ability permits materials to assess their status, in terms of water or aggressive agents penetration, cracking, and deformation. Self-sensing capability of traditional concretes can be improved by adding conductive carbon-based materials as fillers and fibers which increase the signal-to-noise ratio (SNR) by decreasing electrical resistivity. With this improvement, low-cost instrumentation can be used to monitor the electrical resistance by creating a distributed sensor network with nodes distributed throughout the structure. The tool (patent n. 102020000022024) consists of a patented cement-based material containing recycled carbon fibers and biochar filler coupled with a measurement system to acquire electrical impedance.   

ECCs with self-sensing materials have been already installed in the Italian demo site located in Camerino. The monitoring system which permits to acquire and store electrical impedance of ECCs blocks and free corrosion potential of embedded reinforcements is currently working and real-time data are visible in the LIS platform. 

The tool could be used by pre-mixers and precast elements producers, engineers and technicians specialized in monitoring and inspections of concrete structures/infrastructures, facility management bodies.  

ECCs with self-sensing materials can be used to improve the resilience of the built environment against hazardous events, such as earthquakes, providing information that can be exploited to prioritize interventions and timely act where and when needed. These ECCs can indeed be linked to an early warning system which can promptly alert the user of changes in the material conditions. 

The tool has been already successfully tested at a pilot scale (TRL6). During the MULTICLIMACT project it is being tested in a real environment at the Camerino Italian demo case.