The application of modified hydrotalcites as chloride scavengers and inhibitor release agents in cement mortars
bookPart
Owing to the unique molecular structure and high ion exchange capacity, hydrotalcites are believed
to have a potential to be modified and tailor-made as an active component of concrete. In this paper, two
types of modified hydrotalcites (MHT-pAB and MHT-NO2) were incorporated into cement mortars with two
dosage levels (replacing 5% and 10% cement by mass) and a constant water-to-(cement+MHT) ratio of 0.50.
A designated testing programme including strength test, porosity test, and rapid chloride migration and diffusion
test were employed to investigate the effect of modified hydrotalcites on chloride penetration in cement mortar.
The results reported in this study showed the incorporation of MHT-pAB at 5% dosage in mortar specimens
produced a notably improved chloride diffusion resistance with little or no influence on the development of
mechanical strength.
to have a potential to be modified and tailor-made as an active component of concrete. In this paper, two
types of modified hydrotalcites (MHT-pAB and MHT-NO2) were incorporated into cement mortars with two
dosage levels (replacing 5% and 10% cement by mass) and a constant water-to-(cement+MHT) ratio of 0.50.
A designated testing programme including strength test, porosity test, and rapid chloride migration and diffusion
test were employed to investigate the effect of modified hydrotalcites on chloride penetration in cement mortar.
The results reported in this study showed the incorporation of MHT-pAB at 5% dosage in mortar specimens
produced a notably improved chloride diffusion resistance with little or no influence on the development of
mechanical strength.
TNO Identifier
514654
Publisher
CRC Press
Source title
Concrete Solutions 2014
Editor(s)
Grantham, M.
Pages
760-768
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