Influence of Electrochemical Chloride Extraction on the Microstructure of Desalinated Pastes of Concrete
CHENG Li,HUANG Xu-quan,WANG Xiao-ping
DOI:10.11835/j.issn.1674-4764.2008.03.025
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2008,Pages -
- Abstract
A set of installation is designed for electrochemical chloride extracting circularly on reinforced concrete.The removal efficiency is discussed using saturated Ca(OH)2 solution,saturated Ca(OH)2 0.001 mol/L Li2B4O7 solution and distilled water as electrolyte,respectively.And the microstructure of cement paste is analyzed by scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS).The results prove that using saturated Ca(OH)2 0.001 mol/L Li2B4O7 solution as electrolyte is more favorable to removing chloride in concrete.Treated by electrochemical desalination,the hydrated product C-S-H resolves and Ca(OH)2 in the concrete increases,too.It deposites on the wall of pores and fills in pores,and then causes the porosity to decrease,while the ratio of Ca /Si of C-S-H increases in the interface between the steel and the concrete.