Surfacings for bridge decks and roof-top car parks
Equipement - Tests
BRRC is equipped for a great many performance tests on bitumen waterproofing sheets, resins and mastic asphalt, which are used both for research products and in testing products for third parties.
1. General
Preparation of large test slabs (NBN EN 13375): most performance tests on bituminous waterproofing sheets require the prior preparation of large slabs for sawing out test specimens. An adapted version of NBN EN 13375 (adaptations as specified in ETAG 033) must be used for liquid-sprayed resin waterproofing layers.
Reference concrete (NBN EN 1766): reference concrete is the substrate material most commonly used in preparing large test slabs. BRRC has a supplier of reference concrete and has the tools (sand patch test and pull-of tester) to check the specified concrete characteristics.
Manufacture of mastic asphalt: BRRC has a small mastic asphalt mixer for manufacturing mastic asphalt (in batches of up to 160 kg) or melting mastic asphalt blocks.
Manufacture of compacted asphalt concrete: BRRC has mixers of different capacities (25 and 80 kg) and a plate compactor for asphalt mixtures laid in small (50 by 18 cm) or large slabs (60 by 40 cm).
Infrared camera: BRRC has an infrared camera, which is useful to detect defects in the adhesion between a waterproofing sheet and its substrate.
2. Bituminous waterproofing sheetsBond strength (NBN EN 13596): evaluation of adhesion by means of a test in which a tensile force is applied perpendicular to the sheet/concrete, the sheet/asphalt layer, and the sheet/concrete/asphalt layer system.
Shear strength (NBN EN 13653): determination of the dynamic shear strength of the concrete/ sheet/asphalt layer system.
Shear strength after thermal conditioning (NBN EN 14691): determination of the behaviour of a bitumen waterproofing sheet (applied to a concrete surface and covered with an asphalt layer) after long-lasting exposure to a higher temperature, using the shear strength test. The result is compared to the result for shear strength on specimens that have not been heat-conditioned.
Static shear test (G0001 (2006) 6.20): determination of static shear strength with a prediction of shear behaviour in time under the prevailing conditions of mass of overlying layers, slope, and temperature.
Resistance to the compaction of an asphalt layer (NBN EN 14692) (NBN EN 14692): evaluation of the preservation of watertightness after the compaction of an asphalt layer covering a waterproofing sheet.
Behaviour during the laying of mastic asphalt: determination of the resistance to bleeding of binder from a waterproofing sheet into mastic asphalt being laid on top of it.
Determination of water absorption: determination of the amount of water which can be absorbed by the reinforcement or the surface finish of a waterproofing sheet and which may affect the behaviour of the sheet.
3. Resins
The tests mentioned above for bitumen waterproofing sheets can also be performed on resin waterproofing layers where applicable.
4. Mastic asphalt
See the above item 1. General.
See The development of tests for bitumens and asphalt mixtures, item 4. Tests on mastic asphalt in the section Equipment – Tests.
Contact:
Lieve Glorie