BS EN 13880‑7:2019 pdf download.Hot applied joint sealants Part 7: Function testing of joint sealants.
3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14188-1 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: – IEC Electropedia: available at http://www.electropedia.org/ – ISO Online browsing platform: available at http://www.iso.org/obp 3.1 adhesion failures partofthe surface area of the test blocks from which the hot applied joint sealant has completely separated 3.2 cohesion failures cracks in the superficial areas on the faces of the hot applied joint sealant
4 Principle This method is intended to serve as an accelerated test for the assessment of damage to hot applied sealants resulting from fluctuating temperatures, water-spraying and simultaneous dynamic loads.
5 Apparatus 5.1 Tensile test rig, which allows the test specimens to be inserted into holding clamps, conveniently and without disturbing the test specimens before, during or after removal. The test rig shall be capable of testing one specimen or a number of test specimens simultaneously and shall not be significantly affected by the failure of one or more test specimens. The testing rig shall have the following characteristics: — be motor driven through positive drives without slip or significant backlash, so that cycles of extension and compression are carried out steadily and automatically; — be capable of moving the test specimens smoothly and linearly, so that their alignment is maintained at all times without subjecting them to torsion, bending, shock, or significant vibration; — under the specified conditions in Clause 8; — be capable of measuring and recording the changes in force; — The accuracy of the test rig shall be class 2A according to ISO 5893. Testing may also be carried out at differing ratios of temperature, deformation and movement in accordance with the sealant manufacturer’s recommendations provided that the criteria are within the capabilities of the test rig described above. 5.2 Climate chamber, capable of reducing or raising the temperature of a full complement of test specimens to the specified temperature throughout the period of examination. The chamber shall be fitted with a time controlled device to allow the specimen to be subjected to water spraying for 20 % of the total conditioning time at the appropriate temperature as provided for in Clause 7. 5.3 Temperature indicator, consisting of an electronic device capable of measuring temperatures in the range of –30 °C to +30 °C to an accuracy of ± 1 °C; 5.4 Depth gauge, device to measure depth of failures to the nearest 1 mm.BS EN 13880‑7 pdf download.