Detailed Surveys

A chipping survey to determine the arrangement of the rebar inside the concrete is conducted using a hammer drill. We can collect information on the type, diameter, and cover thickness of the rebar.

Using the core sampling and drill methods, a 1% phenolphthalein solution is applied to determine the depth of neutralization of the concrete structure.
Concrete exhibits strong alkalinity, but atmospheric carbon dioxide enters the concrete and reduces the pH value. A decrease in pH value is affected by deterioration factors and leads to destruction of concrete structures.

Using the core sampling and drill methods, samples are taken from the surface of the concrete, 2 cm per layer, to measure the chloride content in each layer. Chloride ingress in concrete is influenced by degradation and leads to the destruction of concrete structures.

A rebound hammer testing machine applies blows to hardened concrete, and estimates the compressive strength by measuring the rebound. Compared to compressive strength testing using the core method, there is no impact on the concrete structure, and results are obtained immediately after measurement.

A concrete core drill is used to obtain samples. We then use the collected concrete core samples to perform compressive strength tests, ASR tests, etc. in the laboratory.

Please feel free to contact us for more information.