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MANUAL ADHERENCE MEASUREMENT DEVICE
PULL-OFF TESTER
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To
test the mechanical quality of plasters and
tiling (plasters, mortars, paints, roughcast,
waterproofing plasters, ...) on various supports
(concrete, stone, brick, wood, metal, ...) used
in the Building Trade, Civil Engineering and
Industry, adherence test devices designed and
perfected by the CEBTP are usually employed. |
TEST
DESCRIPTION :
Using
a 50 mm trepan in an electric drill or core drill,
a circular groove of sufficient depth is cut in
the plaster to mark out the measurement zone.
A metal disc of the same diameter is glued on to
the area cut using rapid-setting epoxy-based adhesive.
A male ball-joint is then fastened to the metal
disc, to go into the female joint in the base of
the central axis of the adherence test device.
The test consist of exerting a tractive force
on the male ball-joint, normal to the surface
of the disc.This give the adherence value (in
daN) of the plaster on its support, if the break
occurs along the contact plane.
It
may happen that the break occurs either in
the plaster, in the support, or partly in
the contact plane and partly in the plaster
or the support. |
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In
the first two cases, the value obtained characterises
the strength of the plaster or the support; in the
last case, the value obtained has no precise meaning,
but it indicates that the tensile strength of the
plaster or the support is of the same order as the
adherence and gives an average value.
In
all cases, the value obtained represents, however,
a minimum adherence value.
The
main part of this device is a metal dynamometer
fixed on a circular plate made of light alloy.
By turning the central axis with the handles, an
axial traction is exerted on the male ball-joint
screwed onto the disc.
The dynamometer is therefore compressed, the reaction
to this force taken by the three feet fixed underneath
the circular plate.
The
tractive force exerted on the disc is directly given
in daN and memorised on the device manometer.
To reset, press the button on the side of the device's
manometer.
Accuracy is of the order of 2 %.
WIDE
RANGE :
8
models from 25 to 5,000 daN.
OPTIONAL
ACCESSORIES :
- Aluminium circular discs Ø 20 - Ø 30 - Ø 50 - Ø 60 - Ø 112.84 mm
- Square aluminium discs of 50 or 100 mm
- Carbide trepan Ø 20 mm or Ø 50 mm
- Distribution plate
- Electronic ratemeter
- Special accessories according to needs (tests on attachments, plugs, screws, ...)
- Light alloy telescopic support to hold the device when it used on vertical walls or uncomfortable positions.
In
compliance with following standards :
- EN
24-624
- EN
1542
- NF
T30-606
- NF
T30-062
- NF
P18-852
- NF
P18-853
- NF
P84-404-1
- NF
P98-282
- NF
P EN 1348
 <Electronic
adherence measurement device>
<Other
CEBTP materials>
You
can obtain a complete set of documents about these new
equipments
quickly by simply placing a request at :
M.
Ludovic DENIS ou M. Frédéric BOURDET
By
Email :
l.denis@cebtp.fr
/ f.bourdet@cebtp.fr
By
Télécopie : +33 1 30 85 23
79 |
By
courrier :
CEBTP
Service matériels
Domaine de St Paul - BP 37
78470 Saint Rémy-lès-Chevreuse
France |
The texts in the present document only have an information purpose,
and neither their author nor CEBTP are committed by them.
The texts, schemes and photographs represented in the present
pages are an exclusive property of CEBTP and they cannot be
reproduced under any form without a previous written authorization
of CEBTP
Copyright © 2001, CEBTP All rights reserved.
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