Air Permeability and Pore Axis Reliability of Tailing-Ball Concrete Under Chloride Salt Dry-Wet Cycle

doi:10.12068/j.issn.1005-3026.2021.10.016

Abstract

Abstract: In order to study the effect of chloride corrosion on tailing-ball concrete， the air permeation tests and pore structure tests were carried out on the ordinary concrete(C)， the tailing-ball concrete(T)and the steel fiber tailing-ball concrete(TF 8)respectively. The variation rules of chloride air permeability coefficient， air volume fraction， bubble frequency and pore axis reliability with the increase of the age of chloride salt dry-wet cycle erosion were obtained. The relationship between concrete air permeability， pore structure and pore axis reliability was given. The results show that with the increase of the age of the chloride salt dry-wet cycle erosion， the air volume fraction and the bubble frequency of C， T and TF 8 increase， and the reliability of pore axis reduces， which lead to the increase of air permeability coefficient. Results also show that the chloride dry-wet cycle can increase the permeability of concrete， make the pore size distribution worse， increase the pore size and decrease the reliability of pore axis.

Key words: tailing-ball concrete; chloride dry-wet cycle; pore structure; air permeability; pore axis reliability

CLC Number:

TU528

LI Yi， LI Shao-feng， GAO Yan. Air Permeability and Pore Axis Reliability of Tailing-Ball Concrete Under Chloride Salt Dry-Wet Cycle[J]. Journal of Northeastern University(Natural Science), 2021, 42(10): 1483-1490.

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