TY - JOUR
T1 - Water permeability of unsaturated cementitious materials
T2 - A review
AU - Li, Kai
AU - Xu, Li
AU - Stroeven, Piet
AU - Shi, Caijun
PY - 2021
Y1 - 2021
N2 - Engineering structures of concrete are generally recognized to be rarely fully water-saturated. The water transportation process in unsaturated cementitious materials offers therefore a relevant problem the understanding of which can be crucial in assessing concrete's degradation and failure mechanisms. In recent years, the number of published papers on this topic is significantly increased. This review presents the latest advancements in determining water permeability of unsaturated cement-based materials by experimental methods and numerical modelling. The effects are summarized of water-cement ratio (w/c), curing age, particle size distribution, interfacial transition zone (ITZ) and supplementary cementitious materials (SCMs) on the permeability of partially saturated cement-based materials. Next, the underlying relationship between relative water permeability and pore structure is presented and discussed. Additionally, an insight into water transport mechanism of unsaturated concrete is proposed. Finally, some evaluative conclusions are drawn that can be instrumental for setting up future studies.
AB - Engineering structures of concrete are generally recognized to be rarely fully water-saturated. The water transportation process in unsaturated cementitious materials offers therefore a relevant problem the understanding of which can be crucial in assessing concrete's degradation and failure mechanisms. In recent years, the number of published papers on this topic is significantly increased. This review presents the latest advancements in determining water permeability of unsaturated cement-based materials by experimental methods and numerical modelling. The effects are summarized of water-cement ratio (w/c), curing age, particle size distribution, interfacial transition zone (ITZ) and supplementary cementitious materials (SCMs) on the permeability of partially saturated cement-based materials. Next, the underlying relationship between relative water permeability and pore structure is presented and discussed. Additionally, an insight into water transport mechanism of unsaturated concrete is proposed. Finally, some evaluative conclusions are drawn that can be instrumental for setting up future studies.
KW - Cementitious materials
KW - Pore structure
KW - Saturation degree
KW - Water permeability
UR - http://www.scopus.com/inward/record.url?scp=85109783793&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.124168
DO - 10.1016/j.conbuildmat.2021.124168
M3 - Review article
AN - SCOPUS:85109783793
SN - 0950-0618
VL - 302
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 124168
ER -