Remote Monitoring

of Concrete Corrosion

Detecting and reporting in detail reinforced concrete decay for a fraction of the cost

Our patented system performs non-destructive survey of structural materials with real time results

THE SYSTEM

Non-Destructive

TEM LAB is an intelligent, non-destructive and minimally invasive system for in situ monitoring of the chemical and physical parameters of concrete, structural concrete, cement conglomerates and building stones.

Real Time Data

It provides real-time measurement of pH, chloride concentration, conductivity, temperature and humidity of the materials to determine the conservation conditions and the status of the relative degradation process.

Wireless

The output data is transmitted wirelessly to a remote server for processing and analysis.

MAIN BENEFITS

Save Money

Substantial savings in collection of information without the need of mobilising assets to conduct surveys on site.

24/7 Monitoring

Continuos and reliable monitoring of the degradation and rate of corrosion of structural materials.

Planning Optimisation

Detailed information and easy interpretation of the data on corrosion damage, optimising planning, budgeting and execution of maintenance works.

Easy Implementation

Quick installation and low maintenance cost.

De Sitters Law of Fives
(Cost Against Delay of Repair)

Major Repairs Generalised Corrosion 130USD
Repair of Localised Corrosion 27USD
Preventative Maintenance 3.5USD
Monitoring 1.7USD

WHY CONCRETE DECAYS

EXPOSURE

EXPOSURE

Deterioration rate of structures depends on the exposure conditions and extent of maintenance. Corrosion, a result of chemical or electrochemical actions, is the most common mechanism responsible for deterioration of reinforced concrete structures.

CARBONATION

CARBONATION

Two major factors cause corrosion of rebars in concrete structures, carbonation and ingress of chloride ions. When chloride ions penetrate in concrete more than the threshold value or when carbonation depth exceeds concrete cover, then it initiates the corrosion of reinforced concrete structures.

PENETRATION

PENETRATION

If corrosion is initiated in a concrete structure, it will surely progress if not treated, reducing  dramatically its service life. As the corrosion penetrates, corrective measures become more complex and expensive, increasing the economic impact of the structure deterioration.

HOW THE SYSTEM WORKS

The TEM is based on electronic measurement of chemical reactions that reveal the penetration of corrosion inside the concrete.
The TEM sensor inserted into the concrete structure through a small hole, injects a solution and measures the half-cell potential with respect to a counter electrode of liquid junction of the type Cu/CuSO4 (sat. sol).
It analyses two parameters:

1. Chlorides concentration and distribution
2. Concrete pH and carbonation depth

The measurements of potential (mV) are translated into concentration values through calibration curves, specific for each sensor, obtained from laboratory measurements of standard reference.

INSTALLATION METHODS

Non-Destructive

During the concrete casting procedure while the structure is being built. The sensors are inmersed into the concrete and the reference electrode is placed when the fluid solidifies.

Minimally Invasive

Is performed in hardened structures after concrete casting, or even years after completion of the construction works. The sensors are inserted into small holes that are drilled in the concrete and sealed afterwards.

VISUALISATION OF RESULTS

The data, which can be acquired on data loggers with an adjustable time frequency, are transmitted to the portal that records the information and manages the alerts, via a GSM or WIFI modem, or directly through a USB serial port.

These images show some of the distribution maps of the potential values (mV) and of the corresponding concentrations of chlorine ions.

The maps, made using commercial software (eg Matlab, Surfer, Arch GIS) or open source (Q Gis), refer to measurements made on a block of concrete made for one half of the volume with distilled water and for the other half with saturated NaCl solution.

The maps show quite clearly the evolution over time of the phenomenon of migration, by diffusion, of the chloride ions in the capillary pores of the cement matrix, triggered by the initial concentration gradient.

Potential
(mV)

Chlorides Concentration
(mol/l)

ABOUT US

ACADEMIC COLLABORATION

Get In Touch With US

TemLab S.r.l.
  • Area Industriale Via De Spuches, s.n.c. Cap 9044 Carini (PA) – Italy
  • +39 091 8674029
  • +39 091 8933042