Rebar deterioration
inspection system

Overview

The world's first technology for nondestructive diagnosis
of rebar corrosion and deterioration

Maintenance and management of many concrete structures in Japan’s infrastructure is becoming a serious problem because of their deterioration. The “Rebar deterioration inspection system” developed by IGS measures the distribution of spatial electromagnetic fields on the structure’s surface, and it accurately diagnoses the state of corrosion by visualizing the inside of the structure.

1Feature

Can directly diagnose the deterioration state of rebar and concrete

With its proprietary calculation theory and electromagnetic field sensing technology, it can clearly visualize the deterioration points of the rebar inside the concrete and cracks in the concrete.

2Feature

Not necessary to destroy the structure

Nondestructive inspection is possible while performing deterioration diagnosis by measuring the spatial distribution of the electromagnetic fields altered by rebars inside the concrete.

3Feature

Can drastically reduce time and manpower requirements

Procedures such as sound testing or concrete scraping are no longer required, thus considerably reducing the inspection time and number of work processes.

Issues

The problem with conventional rebar deterioration inspection systems

Requires enormous time and manpower

Conventional inspection methods include the natural potential method, which determines the state of deterioration by measuring surface potential. This method requires advance preparation, such as cutting a portion of the rebar out of the concrete to connect the electrodes, and takes an enormous amount of inspection time. Therefore, it was not the best method for diagnosing many structures.

Approach

Developing novel solutions

IGS Approach to Issues

Technology

Proprietary calculation theory allows for visualization of rebar rupture and corrosion conditions inside the concrete.

The rebar deterioration inspection system developed by IGS uses world’s first ultra-sensitive sensing device based on imaging theory and quantum mechanical principles. It measures the distribution of the electromagnetic field emitted by the rebar inside the concrete at the surface point, thereby nondestructively diagnosing the rupture and corrosion status of the rebar.

Ruptured concrete image diagnosis
Inspection Method

Enables efficient inspections even in moving inspection vehicle

The rebar deterioration inspection system can be mounted onto a vehicle, thus enabling diagnosis of underground rebars while the inspection vehicle is in motion. Noteworthily, inspection and testing has already been accomplished nationwide in actual sites, including in beams.

Innovation

Advantages of IGS rebar deterioration inspection systems

The rebar deterioration inspection system visualizes the state of rupture and corrosions in deteriorated rebar concrete by using our proprietary calculation theory and electromagnetic sensing technology. Compared with the existing technologies, it considerably reduces the testing time and manpower requirements and enables efficient infrastructure-safety management.

Before

Conventional testing

Manpower requirements​

Large​

Effect of aggregate and moisture

Large​

Impact on materials​

Leads to damage​

Portability

Low​

After

IGS rebar deterioration inspection system​

Manpower requirements​

Small

Effect of aggregate and moisture

Small

Impact on materials​

Can be measured in a nondestructive manner​

Portability

High​

Large​

Manpower requirements​

Small

Large​

Effect of aggregate and moisture

Small

Leads to damage​

Impact on materials​

Can be measured in a nondestructive manner​

Low​

Portability

High​

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