Wpływ fazy ciekłej w betonie na reakcję alkalia-krzemionka

• Autorzy: Owsiak Z.

Warianty tytułu

EN

Influence of cement paste solution on the alkali-silica reaction

• Języki publikacji: PL

Abstrakty

PL

Przedstawiono rozważania dotyczące wpływu składu fazy ciekłej w porach betonu na proces reakcji alkalia - krzemionka. Skład fazy ciekłej w zaczynach, zaprawach i betonach nie zawierających kruszywa reaktywnego wyznacza otoczenie, w którym reakcja mogłaby zajść gdyby był obecny materiał reaktywny. Faza ciekła betonu w stanie równowagi jest roztworem wodorotlenków sodu i potasu o stężeniu zależnym od całkowitej zawartości alkaliów w zastosowanym cemencie. W zależności od reaktywności zastosowanego kruszywa występują wyraźne różnice w stężeniach sodu i potasu w fazie ciekłej betonu. Bardzo istotną rolę w procesie reakcji alkalia - krzemionka odgrywa obecność wody.

EN

Presented considerations concern the influence of liquid phase composition in concrete pores on alkali-silica reaction. The composition of liquid phase in pastes, mortars and concretes without reactive aggregates is defined by the environment, in which the reaction could take place if a reactive material was present. The liquid phase in the concrete in an equilibrium state is a solution of sodium and potassium hydroxides, their concentration depending of alkalis concentrations in the concrete liquid phase, according to the reactivity of applied aggregates. The presence of water plays an essential role in the alkali-silica reaction.

Słowa kluczowe

PL

beton; faza ciekła; reakcja chemiczna; reakcja krzemoalkaliczna

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2001
• Tom: R. 6/68, nr 2
• Strony: 67--70
• Opis fizyczny: Bibliogr. 25 poz., il.

Twórcy

autor

Owsiak Z.

• Politechnika Świętokrzyska

Bibliografia

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