| Title: |
Durability of slag and sulfoaluminate cements exposed to organic acid, ammonium and magnesium |
| Authors: |
Giroudon, Marie; Duchemin, Arthur; Ferry, Camille; Hardy, Xavier; Llobet, Claire; López, Alicia; Mille, Mélissa; Ourliac, Eva; Pages, Lilian; Poey, Mathilde; Taillade, Eva; Tressieres, Florent; Tucoulet, Emma; Sonois-Mazars, Vanessa; Roosz, Cédric; Bertron, Alexandra |
| Contributors: |
Laboratoire Matériaux et Durabilité des constructions (LMDC); Institut National des Sciences Appliquées - Toulouse (INSA Toulouse); Institut National des Sciences Appliquées (INSA)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Institut National des Sciences Appliquées (INSA)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Université Toulouse III - Paul Sabatier (UT3); Communauté d'universités et établissements de Toulouse (Comue de Toulouse) |
| Source: |
16th International Congress on the Chemistry of Cement (ICCC); https://hal.science/hal-04818392; 16th International Congress on the Chemistry of Cement (ICCC), 2023, Bangkok, Thailand |
| Publisher Information: |
CCSD |
| Publication Year: |
2023 |
| Collection: |
Université Toulouse III - Paul Sabatier: HAL-UPS |
| Subject Terms: |
[SPI]Engineering Sciences [physics] |
| Subject Geographic: |
Bangkok; Thailand |
| Description: |
International audience ; Because of its ease of use, low cost, mechanical and insulating properties, concrete is the most widely used material for the construction of buildings and (infra)structures throughout the world. It is therefore subject to a wide variety of external stresses, including exposure to chemically aggressive liquid environments. However, the use of Portland cement-based concrete is known to be responsible for large greenhouse gas emissions. In this context, the latest IPCC report recommends the use of low-emission construction materials as well as the optimization of the use of buildings [1]. In order to ensure the durability and the sustainability of concrete structures in chemically aggressive environments, this study intends to provide a thorough knowledge on the alteration mechanisms of low-carbon cements in different aggressive solutions. Reference ordinary Portland cement pastes and low-carbon cement pastes (slag cement and sulfoaluminous cement) were immersed in three synthetic solutions made of acetic acid, ammonium nitrate and magnesium chloride for two months. Kinetics of alteration were assessed with mass losses and degraded layer thicknesses measurements through the experiment. pH and ions concentrations of the solutions were analysed over time. Deterioration mechanisms were evaluated by mineralogical, chemical, and microstructural analyses by X-Ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. The results show that under the experimental conditions, the acetic acid solution is the most aggressive, followed by ammonium nitrate and magnesium chloride solutions. The low-carbon cements show interesting behaviour in the less aggressive solutions. |
| Document Type: |
conference object |
| Language: |
English |
| Availability: |
https://hal.science/hal-04818392 |
| Accession Number: |
edsbas.F006841 |
| Database: |
BASE |