It is the direct method of semi-destructive extraction test, aimed to evaluate the resistance to the concrete pressure. The pull put test is performed by inserting a specific element in the concrete.
The extraction is performed by inserting in the concrete a specific plug, which is afterwards extracted using an appropriate jack. This jack exerts a force handling in the ring designed for the plug’s depth. Reading the extraction pression it is possible to trace back to the resistance value through a transfer curve appearing in a diagram.
It’s important to know that during the bolt extraction the concrete will break and forms a cone of material which remains cohesive with the anchor.
- Determining the concrete compression strength.
- Semi-destructive technique
- Immediate evaluation of the test values and execution rapidity