NUMERICAL MODELLING OF THE WATER ISOTHERMS OF CEMENT PASTE: BRIDGING THE GAP BETWEEN THE CAPILLARY AND C-S-H GEL PORES
Despite the success of lattice Boltzmann models in simulating complex flows in a multitude of porous media, their application to cement paste remains rather limited.The main reasons appear to be the multi-scale nature of the porosity and the uncertain structure of the calcium silicate hydrate.In this work, a lattice Boltzmann effective media approach is extended from isothermal to non-ideal fluids.The liquid and vapour phases are linked by an equation of state and the interfaces between them are tracked automatically.The model allows the definition of multiple independent surface tensions (i.e.contact angles) between the fluid, C-S-H and solid phases.The novel part is the characterization of the C-S-H with effective transport and wetting properties.The model is used to calculate the water isotherms of a model cement paste composed of solids, nano-porous C-S-H and micron-sized capillary pores.
M.Zalzale P.J.McDonald K.L.Scrivener
Laboratory of Construction Materials,EPFL,CH-1015 Lausanne,Switzerland Department of Physics,University of Surrey,Guildford,Surrey,GU2 7XH,UK
国际会议
The Fourth RILEM International Symposium on Concrete Modelling (CONMOD 2014)(第四届RILEM混凝土材料建模国际会议)
北京
英文
222-226
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）