کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
258697 | 503622 | 2012 | 5 صفحه PDF | دانلود رایگان |
The chemical products generated in the reaction between sodium monofluorophosphate and cement paste, simulated by a calcium hydroxide solution, were analysed using X-ray diffraction and transmission electron microscopy with energy dispersive X-ray analysis. Portlandite, apatite, fluorite, calcite and amorphous products were identified as the main synthesized phases. Nanoparticles of hydroxyfluoroapatite (Ca5(PO4)3(OH,F)) were also profiled. In a medium of high alkalinity such as the tested experimental conditions, PO3F2-PO3F2- is decomposed into PO43- and F− ions, placing its utility as a corrosion inhibitor for steel reinforcements in doubt.
► Reaction between sodium monofluorophosphate and cement paste.
► Portlandite, apatite, fluorite, calcite and amorphous products.
► Phase identification in XRD quantification.
► Kinetic parameters.
► TEM images at different ages.
Journal: Construction and Building Materials - Volume 37, December 2012, Pages 46–50