ISO 9047 pdf download.Building construction — Jointing products — Determination of adhesion/cohesion properties of sealants at variable temperatures
1 Scope
This International Standard specifies a method for the determination of the adhesion/cohesion properties of sealants with predominantly elastic behaviour which are used in joints in building construction.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 6927, Building construction — Jointing products — Sealants — Vocabulary ISO 1 3640, Building construction — Jointing products — Specifications for test substrates
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 6927 apply.
4 Principle
Test specimens are prepared in which the sealant to be tested adheres to two parallel contact surfaces. After submission to cycles of compression and extension under defined conditions, the test specimens are examined for evidence of loss of adhesion and cohesion.
5 Apparatus
5.1 Substrate materials, used for the preparation of test specimens, shall be as defined in ISO 1 3640. Select the substrate material(s) from mortar and/or anodized aluminium and/or glass. Other substrate materials may be used as agreed by the parties concerned. For each test specimen, two substrate pieces of the same material are required with a cross-section of dimensions as shown in Figures 1 and 2. Test substrates of other dimensions may be used, but then the dimensions of the sealant bead and the area of adhesion shall be the same as those shown in Figures 1 and 2. 5.2 Spacers, for the preparation of the test specimens, of cross-section with anti-adherent surface (see Figures 1 and 2). 5.3 Anti-adherent substrate, for the preparation of test specimens, e.g. polyethylene (PE) film, preferably according to the advice of the sealant manufacturer. 5.4 Ventilated convection-type oven, capable of being maintained at .5.5 Refrigerated enclosure, capable of holding the test specimens during extension at a temperature of . 5.6 Container for water immersion of the specimen for conditioning according to method B. 5.7 Test machine, capable of extending and compressing the test specimens at a rate of . 5.8 Spacers for extension, capable of holding the specimens at an elongation of , or (see Table 1 for the width of the spacers), or any other elongation agreed between the parties concerned. 5.9 Spacers for compression, capable of holding the specimens at a compression of , or (see Table 1 for the width of the spacers), or any other compression agreed between the parties concerned. 5.10 Measuring device, scaled in intervals of 0.5m .
6 Preparation of test specimens
Bring the sealant and the substrate material to a temperature of . For each substrate prepare three test specimens. For each specimen, assemble two substrates (5.1 ) and two spacers (5.2) (see Figure 1 ) and set up on the anti- adherent substrate (5.3). Follow the instructions of the sealant manufacturer concerning, for instance, whether a primer is to be used and the mixing procedure for multi-component sealants. Fill the hollow volume formed by the substrates with the sealant. Take the following precautions: a) avoid the formation of air bubbles; b) press the sealant to the contact surfaces of the substrates; c) trim the sealant surface so that it is flush with the faces of the substrates and the spacers. Set the test specimens at the edge of one of the supports. Remove the anti-adherent substrate as soon as possible. Rest the specimens in this position to allow curing or optimum drying of the sealant. Maintain the spacers in place during conditioning.