BS 13880-7:2019 pdf download – Hot applied joint sealants Part 7: Function testing of joint sealants
This document describes a function test for hot‑applied joint sealants intended to be used in areas where the joints are subjected to combined conditions of temperature ≤ – 20 °C and crack joint movement ≤ 35 % in construction joints as well as in spontaneously formed cracks in road and airfield pavements.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13880‑6, Hot applied joint sealants — Part 6: Method for the preperation of samples for testing
EN 13880‑11, Hot applied joint sealants — Part 11: Test method for the preparation of asphalt test blocks used in the function test and for the determination of compatibility with asphalt pavements
EN 13880‑12, Hot applied joint sealants — Part 12: Test method for the manufacture of concrete test blocks for bond testing (recipe methods)
EN 14188‑1, Joint fillers and sealants — Part 1: Specifications for hot applied sealants
ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Specification
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
part of the surface area of the test blocks from which the hot applied joint sealant has completely separated
cracks in the superficial areas on the faces of the hot applied joint sealant
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.
5.1 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.
6 Preparation and conditioning of test specimens
6.1 Prepare the test specimens according to EN 13880‑6.
6.2 Concrete test blocks in accordance with EN 13880‑12 and asphalt test blocks in accordance with EN 13880‑11 shall be used. The dimensions of the test blocks are (75 ± 1) mm length, (25,0 ± 0,5) mm width and (12,0 ± 0,5) mm height. The concrete test blocks shall have a moisture content within the limits of (5,5 ± 1,5) %.
6.3 Use a suitable mould to place two test blocks exactly opposite each other for a joint width of (12,0 ± 0,5) mm.
6.4 If a primer is used, apply it to the sawn test faces of the test blocks in accordance with the manufacturer’s instructions. 6.5 Place a top-mask on the mould so that the joint can be overfilled when the test sample is poured into it.
6.6 Any adhering of the test sample to the borders of the joint shall be avoided.
6.7 Allow the test specimens to cool at laboratory temperature for 2 h after which remove the excess test sample using a heated knife so that the test specimens are flush with the surface of the test blocks.BS 13880-7 pdf download.