SULFURIC ACID ATTACK ON HARDENED PASTE OF GEOPOLYMER CEMENTS PART 1. MECHANISM OF CORROSION AT RELATIVELY HIGH CONCENTRATIONS

By Ali Allahverdi, F. Škvára. 2005

187 citations recorded by the source corpus.

View Paper: https://www.semanticscholar.org/paper/b93ef9d9b77dcdf818c1349d8d365135088b7bb8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

Citations in the corpus

Sorptivity and acid resistance of ambient-cured geopolymer mortars containing nano-silica (2016, background): “The presence of calcium silicate 367 hydrate (CSH) in mixes FA-PC-NS0 and FA-S-NS0 might have reacted with H2SO4 and 368 disintegrated in the form of calcium sulfate or as an amorphous silica gel at the end [39, 40].”
Effect of slag content and activator dosage on the resistance of fly ash geopolymer binders to sulfuric acid attack (2018, background): “Allahverdi and Skvara [33], [34] studied the mechanism of sulfuric acid attack on fly ash and slag GP pastes containing 50% of each.”
Sulfuric acid resistance of one-part alkali-activated mortars (2018, unknown): “Apparently the most important parameter is the CaO content of the binder: During sulfuric acid or sulfate attack, calcium may precipitate as gypsum, thereby causing expansion and damage [14,16,21]; under some circumstances, however, gypsum appears to block pores, inhibiting further corrosion [22].”
Construction Wastes as Raw Materials for Geopolymer Binders (2009, background): “The use of granulated blast-furnace slag and fly ash has been reported in many research works [9-14].”
Durability of alkali-activated binders: A clear advantage over Portland cement or an unproven issue? (2012, result): “Those authors mention that weight loss results for mine waste binders are not very dependent from the type of acid, however, other authors [32–34] report different results for geopolymers based on fly ash and blast furnace slag.”
Performance of alkali-activated slag mortars exposed to acids (2012, background): “Allahverdi and Škvára [28] identified, in activated fly ash and fly ash/slag blends exposed to H2SO4 at pH 2, that the attack proceeds through the leaching of soluble constituents and dealumination of the binding gel, with the consequent cracking of the material enabling the ingress of SO4 2 into th”