The apparatus is used for determining the bond strength between anchored reinforcing steel bar (rebar) and concrete and for checking anchorage performance in situ. A digital readout unit connected to a 30-tonne hydraulic jack and hand pump provides 1% sensitive load or tensional strength value readings.

The Digital Rebar Pull-Out Force Tester has a steel hydraulic cylinder for ease of handling. The apparatus is supplied complete with three different jaw sets, which allow the user to test anchorage rebar with different diameters. These jaws are made of high-strength steel. The three jaw sets are for 4–8 mm, 10–20 mm, and 20–32 mm dia.

The hydraulic equipment consists of:

• hydraulic jack hollow version in aluminium or steel
• 10 tonnes of force at 700 bar, stroke 50 mm
• Compact high-pressure hand pump, 700 bar, single-stage version or double-stage
• Very high-pressure hoses
• Digital pressure gauge, 0-1000 bar accuracy class 0.2%
• Kit complete with tie rod, ball head, and nut for connection with the plug used for the extraction test