Kiwa Polymer Institut GmbH Quellenstraße 3 65439 Flörsheim-Wicker Tel. +49 (0)61 45 - 5 97 10 Fax +49 (0)61 45 - 5 97 19 www.kiwa.de
Test report P 7588-2-E Testing order:
Test of compatibility on wet concrete according to DIN EN 13578
Customer:
SCHOMBURG GmbH & Co. KG Aquafinstraße 2 – 8 32760 Detmold Germany
Person in charge:
J. Magner S. Busch (B. Eng.)
Date of the test report:
2012-04-30
This test report comprises:
9 pages
The test results exclusively refer to the tested materials. The publication of the test report in extracts, and references to tests for advertising purposes require our written agreement in each individual case.
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of 9 pages of the test report P 7588-2-E dated 2012-04-30
CONTENTS 1
SUBJECT ........................................................................................................................... 3
2
RECEIPT OF SAMPLES ................................................................................................. 3
3
PREPARATION AND STORAGE OF THE TEST SPECIMEN ................................ 4
3.1
Preconditioning .................................................................................................................. 4
3.2
Preparation of the mixture of the components ............................................................... 4
3.3
Application ......................................................................................................................... 4
3.4
Coating system of the composite specimen ..................................................................... 5
3.5
Stress Procedure ................................................................................................................ 6
4
PULL-OFF STRENGTH AND BLISTERING .............................................................. 6
4.1
Pull-off strength ................................................................................................................. 6
4.2
Visual examination ............................................................................................................ 8
5
SUMMARY ........................................................................................................................ 9
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1
SUBJECT Polymer Institut was charged by SCHOMBURG GmbH & Co. KG, Detmold (Germany), to test the bond behaviour of the primer INDUFLOOR–IB 1270 under the influence of moisture at the reverse side. The test was carried out in accordance with DIN EN 13578 “Products and systems for the protection and repair of concrete structure - test method - compatibility on wet concrete”
RECEIPT OF SAMPLES The sample was delivered on 2012-01-17 by post at the Polymer Institut. table 1:
receipt of samples
no.
material
INDUFLOOR-IB 1270
component
charge
quantity [kg]
A+B
0120248
3.0
The top sealing on epoxy-base was taken from the stock of the Polymer Institut.
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PREPARATION AND STORAGE OF THE TEST SPECIMEN
Preconditioning With the customer a minimum processing temperature (MAT) of 10°C has been agreed. The Preconditioning of the concrete substrate bodies and the coating material was carried out in detail by the flowchart according to the picture 2 of the DIN EN 13578.
Preparation of the mixture of the components The mixing ratio of the components for the coating material used is to be taken from table 2. table 2:
preparation of the mixtures of the components material
mixing ratio in parts by mass component A
component B
100
27
The materials were measured out in the above mixing ratio and mixed to homogeneity (for about 3 min).
Application The application of the single coating materials has been carried out by an employee of the Polymer Institut. The concrete substrate bodies MC (0.40) according to EN 1766, which have been wet-stored at 10°C were taken out from the water bath, their surface has been wiped with absorptive tissues and the specimens were brought into a vertical position. After a waiting time of 2.5 h, the priming coat has been applied onto the specimens. Between the application of the primer and the application of the subsequent layers, the specimens were stored in a water bath lying on a lath floor in order to keep the water level 10 mm under the coating section (see image 1).
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image 1:
storage of the test specimens in water
Coating system of the composite specimen The consumptions (mean values) are to be taken from the following table. table 3:
coating of the substrate specimens consumption in [g/m²] - mean value layer
sample-No. 3, 4, 7, 8 application tool
primer
top sealing
top sealing on epoxy-base
1. working step
2. working step
225
225 roller
approx. 2000 tooth comb
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Stress Procedure After the application of the coating material the slabs were stressed as follows: table 4:
stress procedure
specimen number 2 2
substrate MC (0.40)
stress procedure hardening
storage
laying in water*
in water*
on air
climate [°C / % r. F.]
time [d]
(8 ± 1) / (75 ± 10)
56 56
* As shown in image 1 the rear sides and the sides of the specimens are stored under wa-
ter meanwhile the upper 10 mm including the coating is stored at standard atmosphere.
PULL-OFF STRENGTH AND BLISTERING
Pull-off strength The bond behaviour of the coatings was determined in accordance with DIN EN 13578 two days after removal of the specimens from the water by testing the pull-off strength according to EN 1542 “Products and systems for the protection and repair of concrete structures - Test methods - Measurement of bond strength by pull-off”. Test cylinders of diameter 50 mm were glued on to the coating, using a solvent-free twocomponent epoxy resin adhesive. The pull-off tests were carried out using a calibrated tensile tester of the company Freundl, type Easy-M, with constant increase of load of 100 N/s. The test results are to be taken from the following table.
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table 5:
specimen
pull-off strength after 56 days storage at 23°C - reference test specimen system with the primer INDUFLOOR-IB 1270 no. 1 2 3 4 5 1 2 3 4 5
7
8
mean value lowest single value table 6:
pull-off strength [N/mm²] 2.9 2.3 2.7 3.1 3.8 2.9 2.4 2.7 2.7 2.4 2.7 2.3
fracture surface [%] B 30 20 10 60 30 30 10 20 30 20
AOS2 70 80 90 40 70 70 90 80 70 80
pull-off strength after 56 days storage at (8 ± 1)°C and (75 ± 10) % r. h. system with the primer INDUFLOOR-IB 1270 no.
mean value lowest single value
1 2 3 4 1 2 3 4 5
pull-off strength [N/mm²] 1.4 1.0 1.0 1.0 1.6 1.8 1.6 1.9 2.2 1.5 1.0
fracture surface [%] B 20 10 10 10 10 20 10 10
AOS2 80 90 90 100 90 90 80 90 90
legend: B: cohesive fracture in concrete AOS1: adhesive fracture between concrete and INDUFLOOR-IB 1270 AOS2: adhesive fracture between INDUFLOOR-IB 1270 and the top sealing on epoxy-base
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Visual examination During the whole period of stressing and immediately after finalization (after 56 days) the test specimen were examined visually in regards to eventually noticeable changes of characteristics of the coating compared to the dry-stored specimen. Visible changes in the coating in terms of blisters, cracks and exfoliation are evaluated according to -
ISO 4628-2 (evaluation of the degree of blistering) ISO 4628-4 (evaluation of the degree of cracking) and ISO 4628-5 (evaluation of the degree of exfoliation)
with an evaluation scale from 0 - 5 for quantity and dimension of the alterations: 0 5
lowest value / no changes heavy changes / high volume
Result The test specimen stored in water at (8 ± 1)°C and those stored under standard atmosphere condition did not show any changes on top of the coating, that means according to ISO 4628 -
no blisters (0) no cracks (0) no exfoliation (0)
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SUMMARY Polymer Institut was charged by SCHOMBURG GmbH & Co. KG, Detmold (Germany), to test the bond behaviour of the primer INDUFLOOR–IB 1270 under the influence of moisture at the reverse side. The test was carried out in accordance with DIN EN 13578 “Products and systems for the protection and repair of concrete structure - test method - compatibility on wet concrete”. The results are given in the previous chapters.
Flörsheim-Wicker, 2012-04-30
The head of the institute
The person in charge
J. Magner
S. Busch (B. Eng.)