The CAPO-TEST system is used to obtain a reliable estimate of the on-site compressive strength of concrete on existing structures in accordance with the pullout test method described in ASTM C900, BS 1881:207, or EN 12504-3. 

The surface at the test location is ground using a planing tool and a 18.4 mm hole is made perpendicular to the surface using a diamond coring bit. A recess (slot) is routed in the hole to a diameter of 25 mm and at a depth of 25 mm. A split ring is expanded in the recess and pulled out using a pull machine reacting against a 55 mm diameter counter pressure ring. The concrete in the strut between the expanded ring and the counter pressure ring is in compression. Hence, the ultimate pullout force F required to pullout the ring is related directly to compressive strength. 

In-situ concrete strength.

Application 

• Quality assurance testing of the finished structure.
• Verification of in-place strength if strength of standard-cured specimens fails to meet acceptance criteria.
• Estimating strength of concrete in evaluation of existing structures.
• Evaluation of fire-damaged structures.

Specification 

• Battery powered handheld hydraulic pulling machine with an electronic precision gauge and robust steel-aluminum body
• Digital display resolution = 0.1 kN
• Maximum force: 100 kN 
• Maximum stroke: 6 mm
• Accuracy of measurements: ± 2%
• Operating conditions: -10 to 50°C, max. RH = 95%
• Memory capacity: 512 measurements (peak-value, time and date of testing)
• USB interface
• AMIGAS Software for PC communication and printout
• 710 W, 24 000 rpm, variable speed, compact electric router
• 650 W, 2 800 rpm, 9 Nm torque, variable speed electric drill
• High performance diamond drill bit, router bit and planing wheel