Early Age Autogenous Deformations of Cement‐Based Materials
| Autor: | Frédéric Grondin, Abdelhafid Khelidj, Marwen Bouasker, Pierre Mounanga |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Cement
Materials science Fineness 0211 other engineering and technologies Modulus 02 engineering and technology 021001 nanoscience & nanotechnology Homogenization (chemistry) 6. Clean water Cracking 021105 building & construction Cementitious Composite material Chemical hydration 0210 nano-technology Shrinkage |
| Zdroj: | Thermo-Hydromechanical and Chemical Coupling in Geomaterials and Applications: Proceedings of the 3 International Symposium GeoProc'2008 |
| DOI: | 10.1002/9781118623565.ch30 |
| Popis: | Autogenous shrinkage is considered to be one of the main phenomena involved in the early‐age cracking of cementitious systems with low water‐to‐cement ratio. It results from the volume difference between the hydration products (hydrates) and the corresponding reactants (cement and water) and the self‐desiccation of the porous network caused by the water consumption in the course of hydration. The objective of this paper is to model the autogenous shrinkage of a cement paste from the first contact between cement and water up to 2 days of hydration by means of a multi‐scale homogenization model. The inputs of the model are the chemical composition and the Blaine fineness of cement, the mechanical properties of the main cement phases and the water‐to‐cement ratio (W/C). The outputs are the evolution of the cement phase volume fractions and chemical hydration reactions, the Young's modulus, the capillary tension, the chemical and the autogenous shrinkage. Numerical and experimental results are analysed in order to validate the model and propose improvements. |
| Databáze: | OpenAIRE |
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