TY - JOUR 
A1 - Pilehvar, Shima
AU - Szczotok, Anna M.
AU - Rodríguez, Juan Francisco
AU - Valentini, Luca
AU - Lanzón Torres, Juan Marcos
AU - Pamies Porras, Ramón Francisco
AU - Kjoniksen, Anna-Lena
T1 - Effect of freeze-thaw cycles on the mechanical behavior of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials
Y1 - 2019
SN - 0950-0618
UR - http://hdl.handle.net/10317/9707
AB - 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 for both Portland cement and geopolymer pastes. (C) 2018 The Authors. Published by Elsevier Ltd.
KW - Ciencia de los Materiales e Ingeniería Metalúrgica
KW - Ingeniería de la Construcción
KW - Geopolymer concrete
KW - Portland cement concrete
KW - Micro-encapsulated phase change materials
KW - Freeze-thaw cycles
KW - Compressive strength
KW - Setting times
KW - Microstructure
KW - 3305 Tecnología de la Construcción
KW - 3305.22 Metrología de la Edificación
KW - 3312 Tecnología de Materiales
LA - eng
PB - ELSEVIER
ER -