Influences of temperature and opening rate of substrate cracks on the mechanical behaviour, crack–bridging ability and deformation mechanisms of one–component, cementitious, flexible waterproofing membranes
| Autor: | R. Zurbriggen, Marco Herwegh, Alfons Berger, Marius Waldvogel |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Waterproofing
Materials science 0211 other engineering and technologies 02 engineering and technology Building and Construction Strain rate 021001 nanoscience & nanotechnology Brittleness Membrane Deformation mechanism 550 Earth sciences & geology mental disorders 021105 building & construction General Materials Science Cementitious Deformation (engineering) Composite material 0210 nano-technology Glass transition |
| Zdroj: | Cement and Concrete Research. 136:106140 |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/j.cemconres.2020.106140 |
| Popis: | One–component, cementitious, flexible waterproofing membranes bridge cracks because their polymer-dominated matrix takes up the deformation. The sensitivity of the deformation of polymers to temperature and strain rate raises interest to the influence of these two parameters on the crack–bridging ability of the waterproofing membranes. Temperature–controlled crack–bridging and dog-bone experiments with in–situ monitoring of the sample's surfaces show a decrease in the crack–bridging ability (CBA) of the waterproofing membranes and a decrease in plastic deformation at testing temperatures above the glass transition temperature (Tg) of the used polymer. At temperatures below the Tg, the membranes deform in a brittle manner. Rate–controlled crack–bridging and dog-bone tests with in–situ monitoring of the sample's surfaces reveal a decrease in crack–bridging ability and plastic deformation with decreasing displacement rate. Hence, temperature and displacement rate are crucial parameters governing the crack-bridging performance of waterproofing membranes. |
| Databáze: | OpenAIRE |
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