BS EN 12310-2:2018 pdf download

BS EN 12310-2:2018 pdf download

BS EN 12310-2:2018 pdf download.Flexible sheets for waterproofing – Determination of resistance to tearing
1 Scope
This document specifies a method for the determination of tear properties of plastic and rubber sheets for roof waterproofing using a trapezoidal test specimen with a nick or cut.
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 ISO 7500-1:2018, Metallic materials 一Calibration and verification of static uniaxial testing machines- Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system (ISO 7500-1:2018)
EN 13416:2001,Flexible sheets for waterproofing 一Bitumen, plastic and rubber sheets for roof waterproofing一Rules for sampling
3,Term and definition
For the purposes of this document, the following terms and definitions apply.
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3.1 resistance to tearing
maximum tensile force required to tear a pre-cut test specimen
4 Principle
The principle of the test is measurement of the force required to completely tear the test specimen, in continuation of the cut or nick already produced in the test specimen. The tearing force is applied by means of a tensile testing machine at a constant speed until the test specimen breaks. The maximum peak force achieved is reported.
5 Apparatus
Tensile testing machine equipped with a continuous recording of force and corresponding extension and capable of maintaining a uniform speed of grip separation as specified below. The tensile testing machine shall have a sufficient loading capacity of at least 2 000N and a grip separation speed of (100+10) mm per min. The width of grips shall not be less than 50 mm. The tensile testing machine shall be equipped with grips of a type which maintain or increase the clamping pressure as a function of the increase of the force applied to the test specimen. The test specimen shall be held so that it does not slip in the grips more than 1 mm for products up to and including 3 mm thick, and 2 mm for thicker products. A mark or tape on the test specimen where it enters the grips will help reveal any slip. The force measuring system shall meet at least Class 2 of EN ISO 7500-1 (i.e. +2 %). The template used for cutting the test specimens shall have dimensions as shown in Figure 1.