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Title: Effect of silica fumes on the permeability of fiber cement composites
Authors: Wei‐Ting Lin
Ran Huang
Jiang‐Jhy Chang
Chin‐Lai Lee
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: coefficient of chloride ion diffusion
penetration depth
polarization resistance
pore size distribution
SEM image
Date: 2009-10
Issue Date: 2018-10-08T02:08:04Z
Publisher: Journal of the Chinese Institute of Engineers
Abstract: Abstract: In this study, the pore systems of cement‐based composites were investigated using absorption, rapid chloride penetration, rapid migration, ponding, mercury intrusion porosimetry (MIP), and scanning electronic microscopy (SEM). Direct current polarization resistance and other permeability parameters were used as indices to justify the effects of fiber and silica fume addition on the permeability of cover concrete. Cement‐based composites containing 10% silica fumes were found to have higher compressive strength, lower absorption, lower coefficient of chloride ion diffusion, lower penetration of chloride ions and higher polarization resistance than those of control specimens. Composites with a combined addition of fiber and silica fume further increased polarization resistance and compressive strength. Addition of silica fumes further improves the permeability of fiber cement composites due to the positive effect from pozzolanic reaction, which produces denser and more homogeneous structures in the matrix. Use of silica fumes or lower w/cm ratio instead of adding fiber in the composites would more effectively increase durability indices such as diffusion coefficient, penetration depth and polarization resistance.
Relation: 32(4) pp.531-541
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50400
Appears in Collections:[河海工程學系] 期刊論文

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