ASTM C910-16(R2021) pdf free download

ASTM C910-16(R2021) pdf free download.Standard Test Method for Bond and Cohesion of One-Part Elastomeric Solvent Release-Type Sealants
1. Scope
1.1 This test method determines the bond and cohesion of one-part, elastomeric, solvent release-type sealants after high- and low-temperature aging. 1.2 The subcommittee with jurisdiction is not aware of any similar ISO standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. N OTE 1—Currently there is no ISO standard similar to this test method. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions of the following terms used in this test method: elastomer, elastomeric, sealant, standard conditions, solvent-release seal- ant.
4. Apparatus
4.1 Extension Machine, as shown in Fig. 1, so designed that the test specimen can be automatically extended at a constant rate of 3.18 mm ( 1 ⁄ 8 in.)/h from a joint width of 12.7 mm ( 1 ⁄ 2 in.) to 14.29 mm ( 9 ⁄ 16 in.) at −23 6 3 °C (−10 6 5 °F). 4.2 Oven, forced-draft type, having temperature controlled at 70 6 2 °C (158 6 3.6 °F). See Specification E145. 4.3 Oven, convection type, having temperature controlled at 50 6 1 °C (122 6 2 °F). 4.4 Freezer Chest or Cold Box, having temperature con- trolled at −23 6 3 °C (−10 6 5 °F). 4.5 Mortar Blocks, six, prepared as described in Test Meth- ods D1191, except that the blocks shall be approximately 25.4 mm (1 in.) wide by 76.2 mm (3 in.) long by 25.4 mm (1 in.) thick and surfaced by wet grinding on an iron lap with No. 60 silicon carbide or aluminum oxide grain. 4.6 Plates, six, of water-white polished float or plate glass approximately 25.4 mm (1 in.) wide by 76.2 mm (3 in.) long by 6.35 mm ( 1 ⁄ 4 in.) thick. 4.7 Aluminum Alloy Plates, six, 6063-T5 or 6061-T6 clear anodized a minimum of 20 min over a scale-free finish, approximately 25.4 mm (1 in.) wide by 76.2 mm (3 in.) long by 6.35 mm ( 1 ⁄ 4 in.) thick. 4.8 Polyethylene Spacer Bars, nine, approximately 12.7 mm ( 1 ⁄ 2 in.) by 12.7 mm ( 1 ⁄ 2 in.) by 50.8 mm (2 in.), 18 bars 12.7 mm ( 1 ⁄ 2 in.) by 12.7 mm ( 1 ⁄ 2 in.) by 25.4 mm (1 in.) and 18 bars 14.29 mm ( 9 ⁄ 16 in.) by 6.35 mm ( 1 ⁄ 4 in.) by 25.4 mm (1 in.).
7. Procedure
7.1 Clean the glass and aluminum plate first with solvent, with detergent solution, followed by a final rinse with distilled water. Allow plates to air dry. Prepare the six mortar blocks as described in 4.5. 7.2 Precondition the unopened containers of sealant at standard conditions for a minimum of 24 h. 7.3 Prepare three test specimens for each substrate to be tested, as follows: Using the polyethylene spacer bars to control the joint dimensions, form a bead of sealant 12.7 mm ( 1 ⁄ 2 in.) wide by 12.7 mm ( 1 ⁄ 2 in.) thick by 50.8 mm (2 in.) long between the parallel 25.4 mm (1 in.) by 76.2 mm (3 in.) long faces of two similar blocks or plates. 7.4 Condition these specimens by allowing them to set for 24 h at standard conditions, then drying them in a convection oven for 7 days at 50 6 1 °C (122 6 2 °F). 7.5 Place the specimens in freezer for 24 h at −23 6 3 °C (−10 6 5 °F). Dislodge spacer bars from sealant, but do not remove spacer bars from assembled specimens. 7.6 Remove specimens from the freezer and condition them for 1 h at standard conditions. 7.7 Place the specimens in a forced-draft oven for 7 days at 70 6 2 °C (158 6 3.6 °F). 7.8 Remove the specimens from the oven. Place them in a freezer for 24 h at −23 6 3 °C (−10 6 5 °F). 7.9 Place the specimens, while frozen, in the grips of the extension machine and extend the joint width from the original 12.7 mm ( 1 ⁄ 2 in.) to 14.29 mm ( 9 ⁄ 16 in.) at −23 6 3 °C (−10 6 5 °F) at the rate of 3.18 mm ( 1 ⁄ 8 in.)/h. After extension is completed, record any initial failure. Then apply appropriate spacers to maintain 14.29 mm ( 9 ⁄ 16 in.) thickness, remove specimens with spacers in place from machine and allow to warm for 3 h at 23 6 2 °C (73.4 6 3.6 °F). At this time examine specimens for adhesive or cohesive failure.