Nitric acid attack on hardened paste of geopolymeric cements - Part 1

Authors
Allahverdi, A Skvara, F
Citation
A. Allahverdi et F. Skvara, Nitric acid attack on hardened paste of geopolymeric cements - Part 1, CERAM-SILIK, 45(3), 2001, pp. 81-88
Citations number
32
Categorie Soggetti
Material Science & Engineering
Journal title
CERAMICS-SILIKATY
ISSN journal
08625468 → ACNP
Volume
45
Issue
3
Year of publication
2001
Pages
81 - 88
Database
ISI
SICI code
0862-5468(2001)45:3<81:NAAOHP>2.0.ZU;2-Y
Abstract
Corrosion of hardened paste of geopolymeric cements, in solutions of nitric acid starts by a leaching process in which the soluble contents of the mat erial (i.e. sodium and calcium) are depleted and replaced by H+ or H3O+ ion s from solution along with an attack by acidic protons on polymeric Si-O-Al bonds (to be discussed in Part 2) resulting in the formation of a partiall y dealkalized and decalcified Si, Al-rich residue.