Prevention and control of common quality problems in cast-in-place concrete engineering (7): The rebound strength of concrete components

When the rebound method is used to test the surface strength of concrete for vertical components (shear walls, columns) of buildings after reaching the age, the rebound value is often low, the carbonation depth is large (as shown in Figure 1.

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1), and the estimated strength of concrete does not meet the design strength requirements.

However, after drilling and sampling, the strength and compressive strength testing can often meet the design requirements.

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