Capillary absorption of water and n-decane by autoclaved aerated concrete

摘要: Abstract An autoclaved aerated concrete was one of three construction materials used in the round-robin study hygral properties carried out European Commission funded Heat, Air and Moisture Standards Development [HAMSTAD] project (Roels S et al., Journal Thermal Envelope Building Science 2004 27 307–325). The material has fine micron-scale matrix porosity generated by packing thin tobermorite 11A plates; coarse mm-scale aeration pores arising from foaming wet mix. We treat as having a strongly bimodal pore size distribution. Capillary absorption does not obey simple t 1/2 kinetics. report here results liquid uptake tests using both water n -decane to investigate cause imbibition behaviour. transport are modelled Sharp Front analysis parallel combination into pores. have weak capillary suction these reaches rise equilibrium during test. model is applied for first time separately subsets total porosity. sorptivity studied (density 450 kg m − 3 , 0.82) about 0.23 mm min − 1/2 .