Print Email Facebook Twitter Aminobenzoate modified hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications Title Aminobenzoate modified hydrotalcites as a novel smart additive of reinforced concrete for anticorrosion applications Author Yang, Z. Fischer, H.R. Polder, R.B. Publication year 2012 Abstract A carbonate form of Mg-Al-hydrotalcite with Mg/Al = 2 and its p-aminobenzoate (pAB) modified derivative have been synthesized and characterized by means of XRD, IR and TG/DSC. Mg(2) Al-CO 3 was prepared by a coprecipitation method and was subsequently modified by pAB through the calcination-rehydration technique. The results from the relevant characterizations combined with Total Carbon Content (TOC) analysis further confirmed that pAB anions were successfully intercalated into the interlayer space of the hydrotalcite. The anticorrosion behavior of Mg(2)Al-pAB was evaluated on the basis of open circuit potential (OCP) monitoring of carbon steel in simulated concrete pore solution at pH 13 contaminated with chloride. The preliminary results from this study demonstrated that ionexchange indeed occurred between free chloride ions in simulated pore solution and the intercalated pAB anions in Mg(2)Al-pAB structure, thereby reducing the free chloride concentration. The simultaneously released inhibitive p-aminobenzoate anions were found to exhibit the envisaged inhibiting effect and cause a shift of corrosion initiation of the steel to higher chloride concentrations than without the modified hydrotalcite. © 2012 Taylor & Francis Group. Subject Mechatronics, Mechanics & Materials Building Engineering & Civil EngineeringMPC - Materials Performance Centre BM - Building MaterialsTS - Technical SciencesHigh Tech Systems & Materials Buildings and InfrastructureMaterialsIndustrial Innovation Built Environment To reference this document use: http://resolver.tudelft.nl/uuid:ae7b1426-a0a6-48aa-97dd-8204db08a220 TNO identifier 465228 ISBN 9780415899529 Source 3rd International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR 2012, 3-5 September 2012, Cape Town, South-Africa, 175-180 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.