TY - JOUR
T1 - Hydration kinetics modeling of sodium silicate-activated slag
T2 - A comparative study
AU - Park, Solmoi
AU - Abate, Selamu Yihune
AU - Kim, Hyeong Ki
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5/10
Y1 - 2020/5/10
N2 - A hydration kinetics model for sodium silicate-based alkali activated slag (AAS) is proposed. The hydration kinetics model for AAS is derived either using mass conservation during internal phase transformation, or by considering chemical affinity of hygro- (thermo-) chemical kinetics by adopting parameters obtained from various calculations and experiments. The obtained modelling result indicates that although the amount of water consumed by slag is lower than that by OPC at an identical mass ratio, the slag binder experiences larger chemical shrinkage, which leads to a dramatic reduction in the relative humidity during hydration. In addition, the modelling result suggests that the hydration rate after 1 day is higher when the pores are distributed in a wider range of diameters (i.e., capillary pores and gel pores are both present as in OPC), in comparison with the case when the pore distribution is in a narrower range (i.e., gel pores are dominant as in AAS).
AB - A hydration kinetics model for sodium silicate-based alkali activated slag (AAS) is proposed. The hydration kinetics model for AAS is derived either using mass conservation during internal phase transformation, or by considering chemical affinity of hygro- (thermo-) chemical kinetics by adopting parameters obtained from various calculations and experiments. The obtained modelling result indicates that although the amount of water consumed by slag is lower than that by OPC at an identical mass ratio, the slag binder experiences larger chemical shrinkage, which leads to a dramatic reduction in the relative humidity during hydration. In addition, the modelling result suggests that the hydration rate after 1 day is higher when the pores are distributed in a wider range of diameters (i.e., capillary pores and gel pores are both present as in OPC), in comparison with the case when the pore distribution is in a narrower range (i.e., gel pores are dominant as in AAS).
KW - Alkali-activated slag
KW - Hydration
KW - Kinetics modelling
KW - Portland cement
UR - https://www.scopus.com/pages/publications/85077953113
U2 - 10.1016/j.conbuildmat.2020.118144
DO - 10.1016/j.conbuildmat.2020.118144
M3 - Article
AN - SCOPUS:85077953113
SN - 0950-0618
VL - 242
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 118144
ER -