Phosphonate mediated surface reaction and reorganization: implications for the mechanism controlling cement hydration inhibition.
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.
Lupu
Corina
C
Department of Chemistry, Rice University, Houston, Texas, USA.
Arvidson
Rolf S
RS
Luttge
Andreas
A
Barron
Andrew R
AR