The influence of cyclic water freezing on gas permeability of non-air-entrained concrete
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Lodz University of Technology, Department of Building Physics and Building Materials, 90 - 924 Al. Politechniki 6, Poland
Publication date: 2021-01-18
Cement Wapno Beton 25(5) 358–366 (2020)
The damage of concrete was characterized by the permeability evolution due to cyclic water freezing. The measurements have been performed on concrete specimens with different watercement ratios [w/c = 0.4 and 0.5] without air-entraining admixtures. The change of compressive strength was also controlled along with freezing cycles. The alteration of pore size distribution was investigated for cement mortars [w/c = 0.4 and 0.5] by means of mercury intrusion porosimetry test. In the case of w/c = 0.50, one can observe an increase in transport parameters such as the intrinsic permeability coefficient. For w/c = 0.40, it can be noticed a lack of ice-induced microstructure degradation. With the increasing number of freeze and thaw cycles, no further destruction of the transport properties was noticed.