Metodo Extraction Tests (ES)
In accordance with UNI 11931 “Certification of technical personnel involved in non-destructive testing in the field of civil engineering and cultural and architectural heritage”
The pull-out method involves measuring the extraction force of the insert, which must be correlated with the compressive strength of the concrete using appropriate experimental correlation curves. The method aims to estimate the strength of the concrete in situ through comparative tests.
The ‘pull-off’ method aims to measure the adhesive strength of a material to the substrate. The test is particularly effective in the field of structural consolidation to verify the adhesion of fibre-reinforced composites to the substrate.
Method: pull-out and pull-off tests (ES)
| Topic | |
| 1.1 | Theoretical part – pull-out test |
| 1.1.1 | Purpose and scope |
| 1.1.2 | Normative references |
| 1.1.3 | Principle of the test method |
| 1.1.4 | Apparatus |
| 1.1.5 | Types of inserts: pre-embedded disc and stem device and disc and stem device inserted into concrete after casting |
| 1.1.6 | Test area |
| 1.1.7 | Procedure |
| 1.1.8 | Expression of results |
| 1.1.9 | Factors affecting the test |
| 1.1.10 | Determination of the experimental correlation curve between the compressive strength of the concrete and the extraction force of the insert |
| 1.1.11 | The combined SonEx method (ultrasonic test and pull-out test) |
| 1.1.12 | Other fields of application in concrete and masonry (pull-out test of mechanical and chemical anchors, etc. with force and displacement measurement) |
| 1.2 | Theoretical part – pull-off adhesion test |
| 1.2.1 | Purpose and scope of application |
| 1.2.2 | Regulatory references |
| 1.2.3 | Principle of the test method |
| 1.2.4 | Apparatus |
| 1.2.5 | Test area |
| 1.2.6 | Procedure |
| 1.2.7 | Expression of results |
| 1.2.8 | Factors affecting the test |
| 2. | Practical part |
| 2.1 | Practical exercise |
| 2.2 | Returning results |
| 2.3 | Drafting the test report |
| 2.4 | Drafting of instructions for level 1 personnel |
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