ADHESION TEST
Adhesion - Epoxy + Acrylic floor paint on Controll®INNERSEAL impregnated concrete The purpose with this test was to find out how Controll®INNERSEAL and Controll®INNERSEAL PLUS affect adhesion for two common Epoxy and Acrylic floor paints on impregnated concrete. This test was performed by SP Technical Research Institute of Sweden, Chemistry division (SWEDAC accredited laboratory) according to ISO-4694 standard. Beckers EPOXI EPX-V and Acrylic FLOOR PLUS are two frequently used indoor and outdoor paints on industrial floors, balconies, walkways etc. They were applied on concrete plates impregnated with different amount of Controll®INNERSEAL and Controll®INNERSEAL PLUS(+). As reference was non-impregnated concrete plates used. The impregnated plates cured for three weeks before they were painted. The adhesion test was done one month after painted.
Result Controll®INNERSEAL and Controll®INNERSEAL PLUS(+) improved adhesion for Epoxy. Acrylic adhesion was also improved by two applications of Innerseal but decreased slightly after 4 and more. Note that the actual number of applications cannot be used as a fact for real projects as each concrete surface absorb differently and therefore require different amount of impregnation in order to fill up pore and capillaries. Puddles of impregnation will for sure decrease adhesion for paint. In general Epoxy has stronger adhesion than Acrylic. By roughen the impregnated concrete surface slightly with sandpaper, adhesion improve significantly. EPOXI FLOOR PAINT - Beckers EPX-V Average force (N)
Coefficient of variation (%)
Reference Reference / No impregnation
1000
19
I2
Innerseal / 2 times
1280
29
I4
Innerseal / 4 times
1080
20
I6
Innerseal / 6 times
938
23
I2 I
Innerseal PLUS / 1 time
1760
24
I2 II
Innerseal PLUS / 2 times
1520
24
I2 III
Innerseal PLUS / 3 times
1480
21
Slip 2
Innerseal / 2 times / surface slightly sandpapered
1290
30
Slip 4
Innerseal / 4 times / surface slightly sandpapered
1370
21
Slip 6
Innerseal / 6 times / surface slightly sandpapered
1460
14
(White)
ACRYLIC FLOOR PAINT - Beckers Floor Plus
Mark
Product/impregnation
Average force (N
Coefficient of variation (%)
Reference Reference / No impregnation
702
33
I2
Innerseal / 2 times
807
31
I4
Innerseal / 4 times
683
13
I6
Innerseal / 6 times
621
30
Mark
Product/impregnation
KOMSOL INTERNATIONAL | GERMANY | SPAIN | SWEDEN | NORWAY www.komsol.eu | www.komsol.se
ADHESION TEST
Reference Acrylic (white) – Reference Epoxy (gray)
Innerseal 2, 4, 6 times. Epoxy
Innerseal 2, 4, 6 times, sanded. Epoxy
Innerseal Plus 1, 2, 3 times + Epoxy
Innerseal 2, 4, 6 times + Acrylic
KOMSOL INTERNATIONAL | GERMANY | SPAIN | SWEDEN | NORWAY www.komsol.eu | www.komsol.se
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issued by an Accredited Testing Laboratory Contact person
Date
Rerere nce
Page
Erik Lindhagen
2013-01 -31
3FOOI783
I (2)
1002 ISOllEe ! 7025
SP Chemistry, Materials and Surfaces
+46 10 516 58 72
N iclas Schonfelder
Erik.Lindhagen@sp.se
Komsol AB Ekonomi viigen 4 43633 ASKIM
Adhesion to concrete (1 appendix)
Commission Testing the adhesion of paint on concrete substrates.
Samples Five concrete substrates were delivered to SP on Jan 7 2013. They were divided in zones with different marking and painted with grey paint marked epoxy and white paint marked akrylat. The epoxy-paint was divided in zones with the following markings;
• • • • •
• • • • •
Nollprov ( i.e. Reference sample) 12 14
16 121 12 II 12 III Slip211110 Slip 412110 Slip 613110
The acrylic paint was divided in zones with the following markings; •
Nollprov ( i.e. Reference sample)
• • •
12 14 16
Preparation On each sample surface at least 7 steel dollies were glued with cyan acrylic glue. The glue was allowed to harden for at least 48h prior to testing. During this time the samples were stored in a room with constant climate of 23±2°C, 50± lO%RH.
Testing The tests were conducted according to ISO 4624 on Jan 29 with the following exceptions .
SP Technical Research Institute of Sweden Postal address
Office location
Phone / Fax / E-mail
SP Box 857
Vasterasen Brinellgatan 4
<46 105165000 <4633135502
SU01 15 BORAs
SE-50462 BORAs
info@sp.se
Sweden
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Laboratories are accredited by the Swedish Board for Accreditation and Conformity Assessment (SWEDAC) under the terms of Swedish legislation . This report may not be reproduced other than in full, except with the prior written approval of the issuing laboratory .
Date
Refererce
p,,,
2013-01-31
3F001783
2 (2)
Niclas Schonfelder
Out of fear to damage the paint layer there was no drilling or cutting around the dollies prior to testing. For practical purposes no outer ring was used. This is not believed to have influenced the measurements much. The dollies were pulled of using a Zwick z lOO universal testing machine with a 2,5kN loadcell. SP inventory number 301037 and 90 1319. The pull speed was 0,8MPais and a pre-load of 2N was chosen.
Results Below the average force and coefficient of variation are presented for each zone. The complete results can be found in appendix 1. The coefficient of variation is quite large and this is believed to be mostly due to variations in the concrete substrates. At large all failures for the epoxy-paint were estimated to be cohesion-failures in the substrate. Similarly all acrylic-paint fai lures were estimated to be adhesion failures, except the reference that was estimated to be cohesion failure in the substrate. Epoxy Reference sample [2 [4 [6 12 I 12 II 12 III Slip 2 11 /10 Slip 4 12/ 10 SliI>6 13/1 0
Average force (N) 1000 1280 1080 938 1760 1520 1480 1290 1370 1460
Coefficient of variation (%) 19 29 20 23 24 24 21 30 21 14
Acrylic Reference sample 12 14 [6
A verage force (N) 702 807 683 621
Coefficient of variation (%) 33 31 13 30
SP Technical Research Institute of Sweden
Appendix
SP Technical Research Institute of Sweden