“…In view of the success of using fractal theory for modeling the effective thermal conductivity of porous media, either structured or randomly distributed [32][33][34], a few fractal-based thermal conductivity models have been established for porous building materials, like wood [35] and concrete [36], at dry state. The fractal theory has also been employed to analyze multiscale pore structure of building materials, including earthbased materials [37], cement pastes [38,39], and concrete [40] as well. In particular, as inspired by fractal modeling of the effective thermal conductivity for unsaturated, three-phase porous media [41,42], the fractal theory seems to be promising for establishment of a thermal conductivity model for moist AAC.…”