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Materials 2019, 12(1), 192; https://doi.org/10.3390/ma12010192

Effect of Hydration and Carbonation Progress on the Porosity and Permeability of Cement Pastes

Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
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Received: 11 December 2018 / Revised: 28 December 2018 / Accepted: 3 January 2019 / Published: 8 January 2019
(This article belongs to the Section Porous Materials)
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Abstract

This paper presents the results of comprehensive cement paste porosity and gas permeability tests. The tests conducted concerned ordinary Portland cement (OPC) cement pastes with varying water-cement ratios ranging from 0.3 to 0.6. The tests were conducted after the curing of cement paste for 90 days and two years under laboratory conditions. Open porosity was determined using three methods: helium pycnometry, mercury intrusion porosimetry, and water saturation. Permeability was determined using a modified RILEM-Cembureau method. The results obtained demonstrated that permeability does not change significantly over time despite the observed material shifts in open porosity characteristics caused both by further progress in hydration and by the carbonation process that occurs. The results of the tests conducted also permitted the quantitative determination of the impact of the water-cement ratio, age, and the progress of carbonation on open porosity measured using different methods and also on the gas permeability of the pastes. View Full-Text
Keywords: cement paste; water-cement ratio; open porosity; helium porosity; MIP porosity; gas permeability; carbonation; hydration degree cement paste; water-cement ratio; open porosity; helium porosity; MIP porosity; gas permeability; carbonation; hydration degree
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Tracz, T.; Zdeb, T. Effect of Hydration and Carbonation Progress on the Porosity and Permeability of Cement Pastes. Materials 2019, 12, 192.

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