The PosiTest AT 50 mm C1583 Kit is designed to
measure tensile strength of concrete surfaces and the
bond strength or tensile strength of concrete repair and
overlay materials by direct tension (Pull-Off Method), in
accordance with ASTM C1583.
Addendum to Instruction Manual v. 5
AT
50 mm C1583 Kit
Steps to Perform a Pull-Off Test
1 - Dolly & Surface Preparation
Ensure the steel dolly (disk) is clean and free of
debris. Remove all surface contaminants and loose
or deteriorated concrete from surface.
2 - Prepare Test Specimen
Using the included 50 mm
diamond-impregnated core bit
(barrel), drill a circular cut
perpendicular to the surface.
Per ASTM C1583 10.1, drill to
a depth of at least 10 mm (0.5
inches). For tests of repair or
overlay materials, drill to at
least 10 mm (0.5 inches) below
the concrete-overlay interface.
Measure the diameter of the test specimen in two
directions at right angles to each other and record
the average diameter, in accordance with ASTM
C1583.
Remove any standing water and debris from the
surface and allow to dry.
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