Effect of freeze-thaw cycles on the mechanical behavior of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials
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Pilehvar, Shima; Szczotok, Anna M.; Rodríguez, Juan Francisco; Valentini, Luca; Lanzón Torres, Juan Marcos; [et al.]Knowledge Area
Ciencia de los Materiales e Ingeniería MetalúrgicaIngeniería de la ConstrucciónSponsors
We gratefully acknowledge funding from the Research Council of Norway, project number 238198. The authors acknowledge "Este trabajo es resultado de la actividad desarrollada en el marco del Programa de Ayudas a Grupos de Excelencia de la Region de Murcia, de la Fundacion Seneca, Agencia de Ciencia y Tecnologia de la Region de Murcia (Grant # 19877/GERM/15)". We would like to thank Tonje Jensen for technical assistance.Realizado en/con
Universidad Politécnica de Cartagena; Universidad de Castilla-La Mancha; Colegio Universitario Ostfold; Universidad de PaduaPublication date
2019Publisher
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Shima Pilehvar, Anna M. Szczotok, Juan Francisco Rodríguez, Luca Valentini, Marcos Lanzón, Ramón Pamies, Anna-Lena Kjøniksen, Effect of freeze-thaw cycles on the mechanical behavior of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials, Construction and Building Materials, Volume 200, 2019, Pages 94-103, ISSN 0950-0618, https://doi.org/10.1016/j.conbuildmat.2018.12.057.Peer review
SiKeywords
Geopolymer concretePortland cement concrete
Micro-encapsulated phase change materials
Freeze-thaw cycles
Compressive strength
Setting times
Microstructure
Abstract
The effect of frost conditions on the physical and mechanical properties of geopolymer concrete (GPC) and Portland cement concrete (PCC) containing two different micro-encapsulated phase change materials (MPCM) was examined. Microstructural studies revealed that the freeze-thaw induced concrete deterioration can be contributed to microcracks appearing at the weak interfacial transition zones between paste/aggregate and paste/MPCM. The addition of MPCM provided an excellent resistance against freeze-thaw cycles with minor reduction of the compressive strength, unlike the samples without MPCM where a stronger reduction was observed. When the temperature was reduced to 0 degrees C, the initial setting time of Portland cement pastes became longer due to the low temperature and the high viscosity. For geopolymer pastes, the initial setting time became shorter due to phase separation of the alkaline solution at low temperatures. Increasing the MPCM concentration reduced the final setting time ...
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