The test is performed by applying an indicator solution to a freshly exposed concrete surface. Concrete that is still alkaline turns a reddish-purple color, while carbonated concrete does not change color. If the entire area turns purple, the concrete has not carbonated and the reinforcement is still protected from corrosion. The measured carbonation depth is then compared with the concrete cover thickness to assess corrosion risk and estimate the structure's remaining service life.
Scope of Work & Work Stages
- Test Point SelectionPoints are selected on representative concrete elements, particularly vulnerable areas such as those near leaks, damp areas, or exposed surfaces.
- Sample PreparationThe concrete surface is exposed by small-diameter drilling or using core samples so that the interior of the concrete is freshly visible.
- Indicator ApplicationThe indicator solution is dripped or sprayed onto the freshly exposed concrete surface.
- Color Reading & MeasurementThe color change is observed and the carbonation depth is measured from the concrete surface.
- Comparison with Concrete CoverThe carbonation depth is compared with the concrete cover thickness (can be combined with Rebar Scan results).
- Analysis & ReportingCorrosion risk and estimated remaining service life are assessed, then compiled into a report.
What You Get
- Carbonation depth data at each test point
- Photo documentation of the color change results
- Comparison of carbonation depth with concrete cover thickness
- Reinforcement corrosion risk assessment
- Estimated remaining service life of the structure
- Conclusions and recommendations in the test report