James Bond Test™ MK IV
|
|
|
James Bond Test™ MK IV in
use on asphalt
|
James Bond Test™ MK IV in
use on Concrete
|
The James Bond Tester™
MK
IV or pull off adhesion test measures the bond strength
or tensile strength of concrete, asphalt, tile, concrete
repair,
or other overlay material by the direct tension or pull off method. By
pulling a 50 mm (2 inch) steel disk attached to the material under the
unit can,
- Measure the near surface strength
of a substrate in order to determine the substrates quality before
applying an overlay
- Determine the bond strength of a
repair or overlay material after it is applied to the substrate
- Determine the tensile strength of a
repair, overlay or adhesive after the material is applied to the surface
The James Bond Tester™ MK
IV
has been successfully used to
verify the quality of existing materials, determine the adhesion
strength of
shotcrete, tile, epoxies, paint and other repair materials or coatings.
-
Each System comes with 10,
50mm (2 inch), ASTM Standard 1583-13 stainless steel
disks
-
Customers who purchase this may
also need the
T-M-170
Aquameter for substrate moisture testing
-
Accurate bond
strength of repair
mortars, epoxy resins, laminates, overlays, and other coatings.
-
Calibrated
gauge with maximum
load indicator and mechanical damping.
-
Ball Joint Design for rapid testing
as well as assuring direct tensile loading
-
Adjustable
alignment plate with built
in leveling facility for both
vertical and horizontal pulls.
-
Compact design.
-
Easy to use.
-
Standards
-
ISO
4624
Paints and varnishes -- Pull-off test for
adhesion
-
EN
1015-12
Methods of test for mortar for masonry.
Determination of adhesive strength of hardened rendering and plastering
mortars on substrate
-
EN
1348
Determination of Tensile Adhesion Strength
for Cementitious Adhesives
-
BS 1881 Part
207
Testing concrete. Recommendations for the
assessment of concrete strength by near-to-surface tests
-
ASTM C
1583
Standard Test Method for Tensile Strength of
Concrete Surfaces and the Bond Strength or Tensile Strength of Concrete
Repair and Overlay Materials by Direct Tension (Pull-off Method)
-
ASTM D 4541 Standard Test Method for Pull-Off Strength
of Coatings Using Portable Adhesion Testers
-
ACI 548-30 Guide for the Application of Epoxy and
Latex Adhesives for Bonding Freshly Mixed and Hardened Concretes
-
DIN 1048
Part 2
Testing
concrete; testing of hardened concrete (specimens taken in situ)
-
ASTM D 7234 Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
-
ASTM D 7234-21 Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
|
|
|
|
James Bond
Tester™ MK IV on Horizontal Concrete Deck
|
James Bond
Tester™ MK IV
on Vertical Concrete Repair
|
James Bond
Tester™ MK IV
on Asphalt
|
Adequate
direct tensile strength between two layers is important if repairs to
concrete structures or additional overlays on existing concrete are to
be structurally sound. The
James Bond
Tester™ MK IV
involves bonding a circular steel
disk to the surface by means of an epoxy resin adhesive. A
controlled tensile force is then applied to the disk and failure will
occur at the weakest point: either in the host
material, or in the bond between overlay and
host material.
|
|
|
James Bond
Tester™ MK IV Showing Operator View while Testing
|
James Bond Tester™ MK IV gauge showing
maximum load indicator.
|
Easy to read gauges facilitate
performing the test. Two gau
ges are supplied
with each system. One for lower strength ranges, weaker
concrete, painted on overlays, etc. The other for higher
strength overlays, and concrete, mortar and asphalt repairs.
These gauges feature
- Rubberized Rugged Outer Housing
- Quick Disconnect for Rapid Setup
- Maximum Load Indicator
- Mechanical Damping to Minimize Test
Error
|
|
|
Alignment Plate showing both horizontal and vertical levels
|
Alignment plate showing vertical level detail
|
The alignment plate has two 360 degree bubble levels built in to facilitate
set up, allowing a direct tensile pull from the surface of the
material under test. The level can be easily adjusted by
utilizing the thumb screws attached to the adjustment legs.
There are also two magnets that hold the pull assembly to the plate. This eliminates the tedious need for screws to keep the two assemblies together when transporting the system from one test to another. Yet it still keeps the system compact for storage and transportation.
|
|
|
James Bond
Tester™ MK IV Core Diagram
|
Core
Indicating Failure at the Bond Between the Overlay and Substrate
|
For
Proper testing, it is first necessary to cut through the overly under
test directly to the substrate underneath. In the case of
paints, thin coatings and overlays this can simply be accomplished with
a fine exacto knife or similar sharp tool. In the case of
concrete overlays, asphalts, tiles or similar repair mortars this can
only be accomplished by coring saw or drill.
Failure can typically occur in either one of three modes:
- in substrate
- at the substrate overlay interface
- in the overlay.
Tests can also be performed for verification purposes and not
to
failure. This will assure the engineer that both the overlay
and substrate have 'bonded' and further work or use can proceed.
|
|
|
James Bond
Tester™ MK IV Pull Disk Being Mounted in Puller Assembly
|
Pull
Disk Mounted in Bond Puller Assembly
|
James Bond Tester™ MK IV
features a ball joint pull disk design. This assures that the
pulling force is always in tension even if the pull disk is uneven due
to irregularities in the overlay surface. This also creates a
rapid test setup as the ball end of the disk simply slide into the Bond
Test Puller.
|
AlignmentPlate
|
|
Diameter
|
Horizontal and
Vertical Level
|
Easy Thumb Screw
Adjustment Knobs
|
|
150 mm / 6"
|
Yes
|
Yes
|
|
Bond Test Puller Assembly
|
|
Diameter
|
Height
|
Maximum Load
|
|
60 mm / 2.5"
|
210 mm / 8.125"
|
30 KN / 6675 lbf
|
|
Bond Test Assembly (Alignment Plate
Attached to Bond Test Puller Assembly)
|
|
Height
|
Width
|
Weight
|
|
240 mm / 9.375"
|
3010 mm / 12.5"
|
5 Kg / 11 lbs.
|
|
James Bond Tester™ MK IV
in Case
|
|
Height
|
Width
|
Depth
|
Weight
|
|
410 mm / 16"
|
508 mm / 20"
|
205 mm / 8"
|
14 Kg / 31 lbs.
|
|
|
James Bond Test™ MK
IV Complete System and Carry Case
|
James
Bond Test™ MK IV
consists
of:
James Bond Test™ MK IV Accessories:
-
Bond_Test_Complete_Data.pdf
Downloadable Instruction Manual
Q. Bond disk will
not stick to surface
A. The Epoxy may have been mixed with unequal parts of Resin & Hardener; causing it to not cure fully. Also, the temperature may be too cold for the epoxy to harden. Thus, more time or a higher temperature is needed for the epoxy to cure.
Q. disk pops off
surface
at a low strength
A. Surface
may not have been cleaned properly. A good indication of this would be
little bits of concrete stuck to the bottom of the disk. You may also
not have a level surface.
Q. When doing a
test to check bonding strength on a roadway, do you have to take the
test to failure?
A. Yes
and no. Make sure you follow the specs for each job you do,
some may want you to take it failure, while others may want you to just
take it to
a
certain
strength.
Q. When I crank the
handle down, the gauge does not move.
A. Chances are you need to fill the
puller with oil.
Q. How much epoxy
do I put on the bond disk?
A. You
need just a thin layer, about 3 for 4 sheets of paper.
