Porosity of cement paste cured at 45 °C as a function of location relative to casting position

摘要: Abstract The influence of location relative to the casting position, on porosity and pore size distribution cement pastes, was investigated. Three different pastes were prepared at a constant water/binder ratio 0.45. control paste (CP) in which Portland used no replacement materials added, with 22% 9% (by mass) fly ash (FA) silica fume (SF), respectively. Paste specimens cast cube moulds either cured air temperature 45 °C humidity 25% for 28 days or moist 14 after °C, followed by curing further days. Samples taken from various locations specimens. Porosity conducted samples using mercury intrusion porosimetry technique. results show that large differences exist between positions. These are larger subjected dry as compared some initial curing. sample position is absorption concrete performed previous investigation. correlation volume water also conducted.