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Study of fresh and hardening process properties of gypsum with three different PCM inclusion methods
Serrano, Susana; Barreneche, Camila; Navarro Ezquerra, Antonia; Haurie Ibarra, Laia; Fernández, Ana Inés; Cabeza, Lluïsa F
Universitat Politècnica de Catalunya. Departament de Construccions Arquitectòniques II; Universitat Politècnica de Catalunya. GICITED - Grup interdisciplinar de ciència i tecnologia a l'Edificació
Gypsum has two important states (fresh and hardened states), and the addition of phase change materials (PCM) can vary the properties of the material. Many authors have extensively studied properties in the hardened state; however, the variation of fresh state properties due to the addition of Micronal DS 5001 X PCM into gypsum has been the object of few investigations. Properties in fresh state define the workability, setting time, adherence and shrinkage, and, therefore the possibility of implementing the material in building walls. The aim of the study is to analyze, compare and evaluate the variability of fresh state properties after the inclusion of 10% PCM. PCM are added into a common gypsum matrix by three different methods: adding microencapsulated PCM, making a suspension of PCM/water, and incorporating PCM through a vacuum impregnation method. Results demonstrate that the inclusion of PCM change completely the water required by the gypsum to achieve good workability, especially the formulation containing Micronal DS 5001 X: the water required is higher, the retraction is lower (50% less) due to the organic nature of the PCM with high elasticity and, the adherence is reduced (up to 45%) due to the difference between the porosity of the different surfaces as well as the surface tension difference.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials
Building materials
phase change material (PCM)
gypsum
fresh state
coating
building
Materials de construcció
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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