Publisher : The Korean Institute of Building Construction
DOI : 10.5345/JKIBC.2016.16.3.219
Title & Authors
An Experimental Study on the Properties of Chloride Binding of Mg/Al-NO3 and Ca/Al-NO3 Layered Double Hydroxides in Solution Lee, Seung-Yeop; Yang, Hyun-Min; Lee, Han-Seung;
Chloride ions ingress continuously in reinforced concrete through pores of it by . Finally, it causes a localized corrosion of the rebar and then it generates cracks on concrete structures. Recently, new materials removing harmful anions have been developed. Layered double hydroxides(LDHs) has an excellent ability to remove harmful anions because various anions can be adsorbed in the interlayer space between divalent and trivalent cations. Thus, LDHs has been applied in various fields. Especially, LDHs is expected to be effective adsorbent binding chloride ions. In this study, and LDHs were prepared by using a co-precipitation method. and LDHs were compared and analyzed by using XRD, SEM analysis. Many nano size hexagonal crystals were observed by SEM. Experiments for binding chloride ions of LDHs were conducted by using potentiometric method. The experimental data were measured every 15 minutes. It was observed that the chloride ion content is reduced by increasing of LDHs mass fraction and the reaction rate of is faster than . In future studies, binding chloride capacity in cement materials will be evaluated based on results of this study.
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