Acid resistance of alkali-activated materials: recent advances and research needs

Gregor Gluth*, Cyrill Grengg, Neven Ukrainczyk, Florian Mittermayr, Martin Dietzel

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

Cementitious materials are frequently applied in environments in which they are exposed to acid attack, eg, in sewer systems, biogas plants, and agricultural/food-related industries. Alkali-activated materials (AAMs) have repeatedly been shown to exhibit a remarkably high resistance against attack by organic and inorganic acids and, thus, are promising candidates for the construction and the repair of acid-exposed structures. However, the reaction mechanisms and processes affecting the acid resistance of AAMs have just recently begun to be understood in more detail. The present contribution synthesises these advances and outlines potentially fruitful avenues of research. The interaction between AAMs and acids proceeds in a multistep process wherein different aspects of deterioration extend to different depths, complicating the overall determination of acid resistance. Partly due to this indistinct definition of the ‘depth of corrosion’, the effects of the composition of AAMs on their acid resistance cannot be unambiguously identified to date. Important parallels exist between the deterioration of low-Ca AAMs and the weathering/corrosion of minerals and glasses (dissolution-reprecipitation mechanism). Additional research requirements relate to the deterioration mechanism of high-Ca AAMs; how the character of the corroded layer influences the rate of deterioration; the effects of shrinkage and the bond between AAMs and substrates.
Originalspracheenglisch
Seiten (von - bis)58-67
Seitenumfang10
FachzeitschriftRILEM Technical Letters
Jahrgang7
DOIs
PublikationsstatusVeröffentlicht - 2022

ASJC Scopus subject areas

  • Allgemeiner Maschinenbau
  • Allgemeine Materialwissenschaften
  • Bauwesen

Fingerprint

Untersuchen Sie die Forschungsthemen von „Acid resistance of alkali-activated materials: recent advances and research needs“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren