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DYNA Pull off Tester

DYNA Pull off Tester. Determining surface strength of concrete prior to repair as strength assessment Measuring adhesive strength of Coatings Carbon fibre Checking overlays Shotcrete Toppings Repairs. DYNA Z ... with digital force display DYNA Z ...E with electronic sensor

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DYNA Pull off Tester

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  1. DYNA Pull off Tester • Determining surface strength of concrete • prior to repair • as strength assessment • Measuring adhesive strength of • Coatings • Carbon fibre • Checking overlays • Shotcrete • Toppings • Repairs • DYNA Z ... with digital force display • DYNA Z ...E with electronic sensor • Display of read-outs • Visual control of the regular rate • of loading

  2. Standards Describe a Rate of Load Increase • ASTM D 4541-02, 2002, Clause 5.1.5 • ø = 50mm, <2,000 N/s • DIN EN 24624, 1992, Clause 3.1 • ø = 20mm, <315 N/s • DIN EN 1348, 1999, Clause 6.3 • Disc 50x50mm, 250 ± 50 N/s • DIN EN 1542, 1998, Clause 7.4 • ø = 50 mm, 78 ± 20 N/s • PrEN 12504-3, in preparation, Clause 6.2 • 500 ± 200 N/s – not practical • ASTM C90-01, Clause 7.4 • 500 ± 200 N/s • DIN 1048, 1991, Clause 6.3.3 • ø = 50mm, 100 N/s for ø = 100mm, 400 N/s • ZTV-SIB 90, Annex 2, Clause 4.6 • ø = 50 mm Rigid substructure 100 N/s Flexible substructure 300 N/s • DIN EN 1015-12 (Mortar) table 2 • ø = 50 mm, 6 to 200 N/s Wide Variety of Requirements

  3. Motor Drive • Ensures compliance with standard load rate EGS 1800Power Station EDm Drive EDm BCBattery holder Connection andAdaptor cable

  4. Appropriate Test Method with test disc DIA 20mm Without coringArea of stress distributionnot clearly defined DIA 50 mm Coring down tothe substrate Area 6.25 larger and defined Coring especially important for fibre-reinforced coatings

  5. Interpretation of test modes Test disc Adhesive Coating Substrate Adhesive/Coating Coating Coating/Substrate Substrate Failure at 3.1 MPa • Expected results: • Tensile strength of concrete 2.7 to 4.1 MPa (about 8-12% of fc) • For adhesive can be less, 1.0 to 2 MPa

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