Study of the Effect of Surface Treatment on the Strength and Permeability of Concrete
| Autor: | Huang-Chang Fan, 范慧中 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 Concrete durability is directly influenced by water permeability, gas permeability or chloride ion penetration. It is usually to apply fly ash, ground granulated blast-furnace slag, or other pozzolans in concrete as supplementary binding material to reduce the pores or pore size and to increase impermeability. And, the use of coating material on concrete surface in an alternative to build up an barrier to prevent water, gas or chloride ion from penetration. Silicate compounds were analyzed and selected as penetrating sealer to apply on concrete specimens for strength and permeability tests. Two water/cement ratios ( 0.68 and 0.41 ) were chosen for concrete mixes. Modified CRD permeability test set-up was used in this study. Test results indicate that specimens surface-treated with penetrating sealer have higher compressive strengths than untreated specimens, and it is more prominent in concrete with higher water/cement ratio. In addition, penetrating sealer effectively reduces water permeability of concrete. However, the charge-passed in treated specimens is higher than in untreated specimens obtained from rapid chloride penetration test ( ASTM C1202-97 ). The higher charge-passed may result from the conductivity of catalyst negative ions and chloride ions. Thus, it will be misled to use the charge-passed as a criterion to evaluate the chloride penetration of sealer-treated concrete. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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