DYNA Z... with digital force display DYNA Z...E with electronic sensor Display of read-outs Visual control of the regular rate of loading 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

Standards Describe a Rate of Load Increase  ASTM D , 2002, Clause  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 , 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  ø = 50mm, 100 N/s for ø = 100mm, 400 N/s  ZTV-SIB 90, Annex 2, Clause 4.6  ø = 50 mmRigid substructure100 N/s Flexible substructure 300 N/s  DIN EN (Mortar) table 2  ø = 50 mm, 6 to 200 N/s Wide Variety of Requirements

Motor Drive  Ensures compliance with standard load rate EDm Drive EGS 1800 Power Station EDm BC Battery holder Connection and Adaptor cable

EDm motor drive EDm BC battery holder

Load Pace The load pace is set via the voltage regulation Sense of rotation The motor drive EDm is running in both senses, forward with the required speed of measurement, backward with the maximum speed

Appropriate Test Method DIA 50 mm Coring down to the substrate DIA 20mm Without coring Area of stress distribution not clearly defined Area 6.25 larger and defined with test disc Coring especially important for fibre-reinforced coatings

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

DYNA Z... S with dial gauge DYNA Z... SE with DYNAMETER Electronic version display of retaining force DYNA Z... FS with WIGAmeter In addition to force, with displacement measurement DYNA Extraction Tester Measures pull-out force displacement on anchored bolts and plugs