Probe for the electrical resistivity measurement of concrete at different depths in new and existing structures (DDE probe)
Data di pubblicazione
Data di priorità
Politecnico di Milano
Department of Chemistry Materials and Chemical Engineering
Matteo Gastaldi, Marco Messina
The invention concerns in a new probe (DDE probe= Different Depths Electrodes probe) for the measurement of the electrical resistivity of concrete (and of any other porous material) at different depths in new and pre-existing concrete / reinforced concrete / pre-stressed reinforced concrete structures; moreover, it detects the internal temperature of the material.
Campo di applicazione
This new probe can be used in new and pre-existing structures for monitoring:
- the corrosion rate of steel reinforcement, with different concrete cover thicknesses, in carbonated concrete;
- the correct filling of the ducts in prestressed post-tensioned concrete members;
- the moisture conditions at different depths in concrete (or in any other porous material);
- the setting and hardening of concrete as well as the strength development, in order to control the achievement of the prescribed concrete curing ;
- the internal temperature of the material.
Nowadays, no probes are available for the electrical resistivity measurements of concrete, or another porous material (such as those present in a masonry), at different depths in new and existing structures. This probe can also be used for corrosion propagation monitoring of reinforcement with different concrete covers in carbonated concrete structures and to evaluate the inner humidity conditions at different depths in porous materials.
Stadio di sviluppo
Advanced. Already tested in lab and on field in an existing structure