Transcript Document

DYNA Pull off Tester
 Determining surface
strength of concrete
 prior to repair
 as strength assessment
 Measuring adhesive
strength of
 Coatings
 Carbon fibre
 Checking overlays
• DYNA Z ... with digital force display
• DYNA Z ...E with electronic sensor
Display of read-outs
Visual control of the regular rate
of loading
 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
Flexible substructure
 DIN EN 1015-12 (Mortar) table 2
 ø = 50 mm, 6 to 200 N/s
100 N/s
300 N/s
Wide Variety of
Requirements
Motor Drive
EGS 1800
Power Station
EDm Drive
EDm BC
Battery holder
 Ensures compliance
with standard load
rate
Connection and
Adaptor cable
Appropriate Test Method
with test disc
DIA 20mm
DIA 50 mm
Coring down to
the substrate
Area 6.25 larger and defined
Without coring
Area of stress distribution
not clearly defined
Coring especially important for fibre-reinforced coatings
Interpretation of test modes
Test disc
Adhesive
Coating
Substrate
Failure at
Adhesive
/Coating
Coating
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
Coating/
Substrate
Substrate