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Title |
Effect of Additional Water on Durability and Pore Size Distribution in Cement Mortar
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Keywords |
시멘트 모르타르 ; 공극률 ; 염화물 확산 ; 투수성 ; 포화도 ; 공극크기 Cement mortar ; Porosity ; Chloride diffusion ; Permeability ; Saturation ; Pore size |
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Abstract |
Porosity in concrete has close relationship with durability characteristics. Additionally mixed water can help easy mixing and workability but causes increased porosity, which yields degradation of durability performance. In this paper, cement mortar samples with 0.45 of w/c (water to cement ratio) are prepared and durability performances are evaluated with additional water from 0.45 to 0.60 of w/c. Various durability tests including strength, chloride diffusion, air permeability, saturation, and moisture diffusion are performed. Then they are analyzed with changing porosity. Changing ratios and the patterns of durability performance are quantitatively evaluated considering pore size distribution, total porosity, and additional water content.
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