EN 14223:2005 – Flexible sheets for waterproofing – Waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles – Determination of water absorption

1 Scope
This European Standard specifies a test method for the determination of water absorption in reinforced bitumen sheets which could influence the functional behaviour of these sheets.
NOTE It is primarily the reinforcement’s ability to absorb water which is examined by this test.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard.
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13416, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Rules for sampling
prEN 14695, Flexible sheets for waterproofing — Reinforced bitumen sheets for waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles — Definitions and
characteristics
ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method 3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 13416, prEN 14695 and the following apply.
3.1
water absorption
increase in mass of test specimen after immersion in water expressed as a percentage
4 Test method
4.1 Principle
The water absorption of the reinforced bitumen sheet is measured after the test specimen has been immersed in water for a defined period and determined as the increase in mass of the test specimen.
4.2 Apparatus and materials
a) Balance, capable of measurements to the nearest 0,1 g.
b) Water bath, capable of maintaining a temperature of (23 ± 3) °C.
c) Chamber (or laboratory), capable of maintaining a temperature of (23 ± 3) °C and (50 ± 5) % RH.
d) Distilled water, or de-ionized water.
e) Equipment for hanging test specimens, without damaging the specimens.
f) Steel wire brush, medium hard
4.3 Preparation of test specimens Take samples in accordance with EN 13416. The test specimens shall be taken at random and at least 1 m from the end of the roll and 100 mm from the edge of the sheet. Five test specimens with dimensions of (200 ± 1) mm x (200 ± 1) mm shall be prepared for testing. If the reinforced bitumen sheet has a surfacing of fine mineral or granules, the surface shall be brushed gently with a steel wire brush to remove any loose mineral or granule. Should problems with heterogeneous results occur (4.6.2) due to surfacing of fine mineral or granules, test specimens may be taken from parts free from such surfacing. The test specimen area shall be the same as described above.
EN 14223:2005 – Flexible sheets for waterproofing – Waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles – Determination of water absorption