EN 14224:2010 – Flexible sheets for waterproofing – Waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles – Determination of crack bridging ability

1 Scope
This European Standard describes a test method for determining the crack bridging ability of reinforced bitumen sheets used in waterproofing systems on concrete bridge decks and other areas of concrete trafficable by vehicles.
2 Normative references
The following referenced documents are indispensable for the application 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 13375:2004, Flexible sheets for waterproofing — Waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles — Specimen preparation
EN 13416:2001, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof waterproofing — Rules for sampling
EN 14695:2010, Flexible sheets for waterproofing — Reinforced bitumen sheets for waterproofing of concrete bridge decks and other trafficked areas of concrete — Definitions and characteristics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13416:2001, EN 13375:2004,EN 14695:2010 and the following apply.
3.1
crack bridging ability
ability of reinforced bitumen sheets to withstand movements of the crack of the base specimen without deterioration
3.2
crack width
distance between the sides of the crack of the base specimen, measured by monitoring the movement of the base specimen during the test
3.3
nominal curve
input of changes as a function of time which the crack width of the base specimen shall follow during a test
3.4
completely broken
disconnection of the reinforced bitumen sheets above the crack of the base specimen into two completely separated parts
4 Test method
4.1 Principle
After applying the reinforced bitumen sheet(s), a crack is induced in the base specimen at the saw-cut.
The crack bridging ability of reinforced bitumen sheets is determined by periodically varying the crack width within defined limits. The test can be carried out at different temperatures.
4.2 Apparatus
4.2.1 Temperature controlled chamber, with an accuracy of ± 1 °C, for the test specimens and the loading parts of the testing apparatus during the test.
4.2.2 Testing apparatus, for generating changes in the crack width, able to control and monitor the crack width of the base specimen during the test.
Devices to fix the test specimens onto the testing apparatus shall not influence the sheet(s).
4.2.3 Crack width measuring device, with an accuracy of ± 0,01 mm, to control and monitor the crack width during the test.
4.3 Sampling and preparation of test specimens
4.3.1 Sampling
Samples and test pieces of the reinforced bitumen sheet(s) shall be taken in accordance with EN 13416.
EN 14224:2010 – Flexible sheets for waterproofing – Waterproofing of concrete bridge decks and other concrete surfaces trafficable by vehicles – Determination of crack bridging ability