RT journal article
T1 Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste
A1 Romero-Hermida, M. I.
A1 Borrero-López, Antonio María
A1 Flores-Alés, V.
A1 Alejandre, Francisco Javier
A1 Franco, José María
A1 Santos Sánchez, Alberto
A1 Esquivias, L.
A2 Ciencias de la Tierra
K1 lime putty
K1 mortar
K1 carbonation
K1 rheology
K1 ultrasound
AB 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.
PB MDPI
SN 1660-4601
YR 2021
FD 2021-06
LK http://hdl.handle.net/10498/25521
UL http://hdl.handle.net/10498/25521
LA eng
NO 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).
DS Repositorio Institucional de la Universidad de Cádiz
RD 14-nov-2026