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http://dx.doi.org/10.4191/kcers.2013.50.1.25

Waterproofing Mechanism of Hardened Cement Paste with Waterproofing Materials  

Kang, Hyun Ju (Reasearch Institute of Chemical Engineering, Kangwon National University)
Song, Myong Shin (Reasearch Institute of Chemical Engineering, Kangwon National University)
Park, Jong Hun (Department of Chemical Engineering, Kangwon National University)
Jeon, Se Hoon (Department of Chemical Engineering, Kangwon National University)
Lee, Sung Hyun (Department of Chemical Engineering, Kangwon National University)
Publication Information
Journal of the Korean Ceramic Society / v.50, no.1, 2013 , pp. 25-30 More about this Journal
Abstract
The pore volume of hardened cement with waterproofing materials is lower compared to that of hardened cement without waterproofing materials. Thus, fewer gaps will appear by means of chemical reactions between $Ca^{2+}$ ions in hardened cement and water, solutes, and other ions. Due to the selective permeability, the osmotic pressure of hardened cement can change due to physical effects such as the reduction of the pore volume and the reduction in the number of pores, as well as by the electrochemical reaction between water, solutes, other ions and $Ca^{2+}$ ions in hardened cement. Of course, these factors do not have independent effects but instead a combined complex effect. Accordingly, we studied changes in the osmotic pressure due to the difference in the pore structure of hardened cement. A pore size smaller than 1 nm in hardened cement had only a slight effect on the osmotic pressure, whereas a pore size larger than 1 nm had a direct effect on the osmotic pressure.
Keywords
Water proofing materials; Permeability; Osmotic pressure; Hydration; Pore;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 S. T. Lee and S. H. Lee, "Mechanical Properties and Durability of Cement Concrete Incorporating Silica Fume(in Korean)," J. Kor. Ceram. Soc., 47 [5] 412-8 (2010).   과학기술학회마을   DOI   ScienceOn
2 J. K. Lee, Y. S. Chu, and H. Song, "Effect of Limestone Powder on Hydration of $C_{3}A-CaSO_{4}{\cdot}2H_{2}O$ System(in Korean)," J. Kor. Ceram. Soc., 48 [6] 584-8 (2011).   과학기술학회마을   DOI   ScienceOn
3 D. H. Kim and T. W. Song, "Synthesis of Pure and Porous $C_{3}A-CaSO_{4}{\cdot}2H_{2}O$ Clinker by Burning of Hydrates(in Korean)," J. Kor. Ceram. Soc., 47 [5] 401-6 (2010).   과학기술학회마을   DOI   ScienceOn
4 K. S. Bae, "A Study on Relationship Between Osmosis by Semi-permeability to NaCl Solution and Pore Structure of Cement Mortar(in Korean)," J. Arch. Inst., 22 [1] 103-10 (2006).   과학기술학회마을
5 D. McConnell, R. C. Mielenz, W. Y. Holland, and K. T. Greene, "Cement-Aggregate Reaction in Concrete," J. Am. Concr. Inst., 44 [3] 93-128 (1947).
6 M. Gnter and H. K Hilsdorf, "Influence of Physical and Chemical Interactions Between a Concrete Substrate and Organic Surface Coatings on Bond Strength," pp. 161-874, Durability of Non-Metallic Inorganic Building Materials, Proceeding of International RILEM Workshop, Germany, 1988.