Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste
| Autor: | José M. Franco, F. J. Alejandre, A. Santos, María Isabel Romero-Hermida, Antonio M. Borrero-López, V. Flores-Alés, Luis Esquivias |
|---|---|
| Přispěvatelé: | Universidad de Sevilla. Departamento de Construcciones Arquitectónicas II (ETSIE), Ciencias de la Tierra |
| Rok vydání: | 2021 |
| Předmět: |
carbonation
Materials science Health Toxicology and Mutagenesis Carbonation 0211 other engineering and technologies Phosphogypsum 02 engineering and technology Raw material engineering.material Calcium Sulfate 01 natural sciences Article Putty Ultrasound 021105 building & construction 23 Química Lime mortar Lime ultrasound Construction Materials 010401 analytical chemistry Metallurgy Public Health Environmental and Occupational Health lime putty Oxides Phosphorus Calcium Compounds Microstructure 0104 chemical sciences Mortar mortar engineering Medicine rheology Rheology Lime putty |
| Zdroj: | International Journal of Environmental Research and Public Health Volume 18 Issue 12 International Journal of Environmental Research and Public Health, Vol 18, Iss 6664, p 6664 (2021) Int. J. Environ. Res. Public Health 2021, 18(12), 6664 RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz instname Arias Montano. Repositorio Institucional de la Universidad de Huelva idUS. Depósito de Investigación de la Universidad de Sevilla |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph18126664 |
| Popis: | This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a lime putty obtained from the treatment of phosphogypsum with sodium hydroxide. The physical, rheological and mechanical properties of this phosphogypsum-derived mortar have been studied, as well as the mineralogical composition, microstructure by scanning electron microscope (SEM) and curing process by monitoring carbonation and ultrasonic propagation velocity. Considering the negative influence of sulphates on the hardened material, the behaviour of the material after sulphates precipitation by adding barium sulphate was additionally tested. Carbonation progressed from the outside to the inside of the specimen through the porous system by Liesegang rings patterns for mortars with soluble sulphates, while the carbonation with precipitated sulphates was controlled by diffusion-precipitation. Overall, the negative influence of low-sulphate contents on the mechanical properties of mortars was verified. It must be highlighted the importance of their precipitation to obtain adequate performance. This research was funded by Programa Estatal I+D+i Retos de la Sociedad of the Ministry of Science and Innovation (Spain), which supported this research (MAT2017-84228-R research project). |
| Databáze: | OpenAIRE |
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