Szczegóły publikacji
Opis bibliograficzny
Alkali-silica reaction in calcium aluminate cement mortars / Ł. KOTWICA, J. SZYDŁOWSKI // W: ICCC 2023 [Dokument elektroniczny] : further reduction of CO2 - emissions and circularity in the cement and concrete industry : 16th International Congress on the Chemistry of Cement 2023 : September 18–22, 2023, Bangkok, [Thailand] : congress proceeding, Vol. 3. — Wersja do Windows. — Dane tekstowe. — [Bangkok] : Thailand Concrete Association, [2023]. — S. 377–380. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: https://www.iccc-online.org/fileadmin/gruppen/iccc/proceeding... [2023-12-29]. — Bibliogr. s. 380, Abstr.
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 151117 |
|---|---|
| Data dodania do BaDAP | 2024-01-12 |
| Rok publikacji | 2023 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Creative Commons |
Abstract
The alkali-silica reaction (ASR) in Portland cement-based composites is a serious problem that is responsible for the deterioration of numerous structures around the world. The reason for the alkali-silica reaction is the use of de-icing salt solutions, both organic and inorganic. This topic is well described in the literature, however, there are some knowledge gaps regarding this phenomenon. Calcium aluminate cement composites are sometimes used for pavements repairing in airfields and roads, and thus may be subjected to the action of de-icing solutions, especially those based on acetates and formates. The present work reports the results of investigations on the possibility of an alkali-silica reaction in calcium aluminate cement mortars. Fused silica was used as a model reactive aggregate and was introduced into mortars as a partial replacement for quartz sand. The influence of both inorganic salts (chlorides, nitrates) and organic salts (acetates, formates) of sodium and potassium was investigated. The results obtained showed that salt solutions may cause an alkali-silica reaction in calcium aluminate cement mortars. In general, organic salts cause much more severe deterioration of mortars than inorganic salts. In all cases, expansion was associated with the formation of an alkali-silica gel. It was shown that the alkali-silica reaction can proceed in the system without the presence of solid calcium hydroxide and without an external source of hydroxyl ions.
