@misc{10481/96843,
year = {2024},
month = {10},
url = {https://hdl.handle.net/10481/96843},
abstract = {Gypsum plaster could replace more energy-intensive building materials, especially considering the versatility of
traditional gypsum used for exterior/structural applications since ancient times. However, low weathering
resistance limits the exterior use of modern industrial gypsum and suitable additives are required to design
optimized plasters and renders. Here, ternary plasters containing 50–95 wt% gypsum and varying amounts of
lime and a commercial recycled pozzolanic additive (Metapor®) are compared with pure gypsum plaster to
verify whether pozzolanic reaction products are responsible for the often praised superior performance of
traditional gypsum. A detailed mineralogical, physico-mechanical, and hygric characterization shows that bassanite
hydration is delayed and calcium carbonate polymorphs are stabilized in the presence of additives, while
porosity and pore size distribution can be controlled by varying the additive content. Compressive and flexural
strength reveal a negative correlation with additive content and a high additive content is required to improve
weathering. However, a 25–40 % reduction in embodied energy can be achieved by replacing commonly used
metakaolin or Portland cement with Metapor®. Our findings contribute to a better understanding of underlying
reaction processes in gypsum-based materials and facilitate a wider use of modified gypsum formulations in
sustainable construction and rehabilitation/conservation interventions.},
organization = {Unidad de Excelencia “UCE2018-01 - Ciencia en la Alhambra” (UGR)},
organization = {Unidad Cientifica de Excelencia “UCE.PP2016.05” (UGR)},
organization = {Research Group “RNM0179” (Junta de Andalucia)},
organization = {Projects PID2023-149367NA-I00 and PID2021-125305NB-I00 (Ministerio de Ciencia, Innovación y Universidades, Spain)},
publisher = {Elsevier},
keywords = {Gypsum plaster},
keywords = {Mechanical properties},
keywords = {Weathering test},
title = {Gypsum-based materials for exterior applications using lime and recycled pozzolanic additions},
doi = {10.1016/j.conbuildmat.2024.138713},
author = {Elert, Kerstin and Spallarossa Jiménez, María Marta and Burgos Ruiz, Miguel},
}