Phosphonate mediated surface reaction and reorganization: implications for the mechanism controlling cement hydration inhibition |
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Authors: | Lupu Corina Arvidson Rolf S Luttge Andreas Barron Andrew R |
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Institution: | Department of Chemistry, Rice University, Houston, Texas, USA. |
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Abstract: | Vertical scanning interferometry and XPS show the reaction of CaCO3 with the hydration retarder nitrilo-tris-(methylene)phosphonic acid follows a pathway of dissolution of the calcium followed by precipitation of a calcium phosphonate; subsequent surface reorganization/restructuring of the calcium phosphonate exposes the underlying CaCO3 for further hydration. |
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