• 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 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/sFlexible substructure

300 N/s DIN EN 1015-12 (Mortar) table 2

ø = 50 mm, 6 to 200 N/s

Wide Variety of Wide Variety of RequirementsRequirements

Motor Drive

Ensures compliance with standard load rate

EDm Drive

EGS 1800Power Station

EDm BCBattery holder

Connection andAdaptor cable

Appropriate Test Method

DIA 50 mmCoring down tothe substrate

DIA 20mmWithout coring

Area of stress distributionnot 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

Coating Coating/Substrate

Substrate

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

3.1 MPa