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Effects of W/P ratio and limestone filler on permeability of cement pastes

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Abstract
Because of environmental and economic benefits, a fraction of cement is increasingly replaced by limestone fillers raising a question on to what extent limestone fillers affect the durability of cementitious materials. This work aims at understanding the effects of water/powder (w/p) ratio and limestone filler replacement on water permeability of cement pastes. A newly proposed technique using a controlled constant flow concept was applied to measure permeability of hardened cement paste samples following a factorial experimental design. It was observed that both limestone filler and w/p ratio significantly influence the water permeability. At a given w/p ratio, adding limestone filler made the microstructure coarser, especially for high w/p ratio. Nevertheless, if the comparison is based on a given water/cement (w/c) ratio instead of w/p ratio, the limestone filler replacement refined the microstructure in terms of capillary porosity and pore size distribution, resulting in permeability decreases of cement pastes. Furthermore, a modified Carmen-Kozeny relation was established which enables prediction of the permeability from capillary porosity and the critical pore diameter.

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Chicago
Tri Phung, Quoc, Norbert Maes, Diederik Jacques, Geert De Schutter, and Guang Ye. 2016. “Effects of W/P Ratio and Limestone Filler on Permeability of Cement Pastes.” In Concrete with Supplementary Cementitious Materials, ed. Ole M. Jensen, Konstantin Kovler, and Nele De Belie, RILEM PRO 113:141–151. Paris, France: RILEM.
APA
Tri Phung, Q., Maes, N., Jacques, D., De Schutter, G., & Ye, G. (2016). Effects of W/P ratio and limestone filler on permeability of cement pastes. In Ole M. Jensen, K. Kovler, & N. De Belie (Eds.), Concrete with Supplementary Cementitious Materials (Vol. RILEM PRO 113, pp. 141–151). Presented at the Int. RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016 - Segment on Concrete with Supplementary Cementitious Materials, Paris, France: RILEM.
Vancouver
1.
Tri Phung Q, Maes N, Jacques D, De Schutter G, Ye G. Effects of W/P ratio and limestone filler on permeability of cement pastes. In: Jensen OM, Kovler K, De Belie N, editors. Concrete with Supplementary Cementitious Materials. Paris, France: RILEM; 2016. p. 141–51.
MLA
Tri Phung, Quoc, Norbert Maes, Diederik Jacques, et al. “Effects of W/P Ratio and Limestone Filler on Permeability of Cement Pastes.” Concrete with Supplementary Cementitious Materials. Ed. Ole M. Jensen, Konstantin Kovler, & Nele De Belie. RILEM PRO 113. Paris, France: RILEM, 2016. 141–151. Print.
@inproceedings{8531146,
  abstract     = {Because of environmental and economic benefits, a fraction of cement is increasingly
replaced by limestone fillers raising a question on to what extent limestone fillers affect the
durability of cementitious materials. This work aims at understanding the effects of
water/powder (w/p) ratio and limestone filler replacement on water permeability of cement
pastes. A newly proposed technique using a controlled constant flow concept was applied to
measure permeability of hardened cement paste samples following a factorial experimental
design. It was observed that both limestone filler and w/p ratio significantly influence the
water permeability. At a given w/p ratio, adding limestone filler made the microstructure
coarser, especially for high w/p ratio. Nevertheless, if the comparison is based on a given
water/cement (w/c) ratio instead of w/p ratio, the limestone filler replacement refined the
microstructure in terms of capillary porosity and pore size distribution, resulting in
permeability decreases of cement pastes. Furthermore, a modified Carmen-Kozeny relation
was established which enables prediction of the permeability from capillary porosity and the
critical pore diameter.},
  author       = {Tri Phung, Quoc and Maes, Norbert and Jacques, Diederik and De Schutter, Geert and Ye, Guang},
  booktitle    = {Concrete with Supplementary Cementitious Materials},
  editor       = {Jensen, Ole M. and Kovler, Konstantin  and De Belie, Nele},
  isbn         = {978-2-35158-180-3},
  language     = {eng},
  location     = {Lyngby (Denmark) },
  pages        = {141--151},
  publisher    = {RILEM},
  title        = {Effects of W/P ratio and limestone filler on permeability of cement pastes},
  volume       = {RILEM PRO 113},
  year         = {2016},
}