Effect of MgO-Based Expansive Agent on the Cement-Based Mortar Behavior
| Autor: | Kinda Hannawi, Aveline Darquennes, Lina Ammar |
|---|---|
| Přispěvatelé: | Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES), Laboratoire de Génie Civil et Génie Mécanique (LGCGM), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Institut National des Sciences Appliquées (INSA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Cement
Materials science Brucite Swelling capacity 0211 other engineering and technologies Self-healing 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Durability law.invention MgO-based expansive agent Portland cement [SPI]Engineering Sciences [physics] law 021105 building & construction engineering Cementitious Composite material Mortar 0210 nano-technology Swelling Shrinkage |
| Zdroj: | RILEM Bookseries (RILEM, volume 31) RILEM Bookseries (RILEM, volume 31), 31, Springer Science and Business Media B.V., pp.329-339, 2021, ⟨10.1007/978-3-030-72921-9_27⟩ RILEM Bookseries ISBN: 9783030729202 |
| DOI: | 10.1007/978-3-030-72921-9_27⟩ |
| Popis: | International audience; As shrinkage can affect the concrete durability, several solutions were designed to limit this deformation. One of them consists to add expansive agents like MgO-based products. The aim of the present research work is to better understand the effect of MgO-based expansive agent on the self-healing potential of cementitious materials. At 28 days old, Portland cement mortars with different contents of expansive agent (0%, 5% and 10%) are pre-cracked by means of splitting test and stored under water. Self-healing is monitored using 2D and 3D tests: optical microscope observations and water permeability measurements respectively. Mechanical resistances and deformations of the studied mortars are also monitored and their microstructures are characterized by means of thermogravimetric analysis. The results show that mortars containing MgO-based expansive agent present a better self-healing capacity. It can be due to its swelling capacity decreasing/deleting shrinkage deformations and the formation of supplementary products like brucite. © 2021, RILEM. |
| Databáze: | OpenAIRE |
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