| 구체방수제가 혼입된 시멘트 경화체의 방수 메카니즘 |
| 강현주, 송명신, 박종헌1, 전세훈1, 이성현1 |
강원대학교 삼척캠퍼스 화학공학연구소
1강원대학교 삼척캠퍼스 화학공학과 |
| Waterproofing Mechanism of Hardened Cement Paste with Waterproofing Materials |
| Hyun Ju Kang, Myong Shin Song, Jong Hun Park1, Se Hoon Jeon1, Sung Hyun Lee1 |
Reasearch Institute of Chemical Engineering, Kangwon National University
1Department of Chemical Engineering, Kangwon National University |
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| ABSTRACT |
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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. |
| Key words:
Water proofing materials, Permeability, Osmotic pressure, Hydration, Pore |
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