The purpose of the proposed testing procedure is to determine tensile strength and tensile modulus of elasticity of materials and their connections. The tensile strength or the maximum tensile force and elongation at break shows the ability of a material to withstand stresses during use. To perform the tests a universal testing machine Z100 Zwick/Roell or Z1200 Zwick/Roell equipped with special grips and measuring equipment by Hottinger Baldwin Masstechnik (universal amplifier HBM Quantum MX-840B – LB 164 with CATMAN EASY AP software and tensile force transducer of nominal (rated) force appropriate to the strength of tested material (HBM S2M/1000N) is used. Depending on the type of material, the tests are conducted in accordance with:
Maximum tensile force and elongation at break of a membrane is determined according to: EN 13859-1 - Flexible sheets for waterproofing - Definitions and characteristics of underlays -- Part 1: Underlays for discontinuous roofing. The detailed procedure is given in the standard EN 12311-1 - Flexible sheets for waterproofing - Part 1: Bitumen sheets for roof waterproofing - Determination of tensile properties.
The tensile strength and tensile modulus of elasticity of polyurethane matrix of the composite and layers is determined according to EN ISO 527-2 – Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics.
If the tested product is a soft rubberlike material breaking at larger strains, the ISO 37 – Rubber, vulcanized or thermoplastic - determination of tensile stress-strain properties, is used.
The tensile strength and tensile modulus of elasticity of composite material is determined according to EN ISO 527-4 – Plastics - Determination of tensile properties - Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites.
As part of the testing of the PM&VL7 research line, Rothoblaas membranes, Flex&Robust composites, polyurethane matrix of the composite and layers were examined before and after ageing.