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[1851] Artykuł: Dependence between the composition of pore solution and the expansion of mortar containing reactive aggregateCzasopismo: Ceramics-Silikaty Tom: 49, Zeszyt: 2, Strony: 109-114ISSN: 0862-5468 Wydawca: INST CHEMICAL TECHNOLOGY, DEPT GLASS CERAMICS, TECHNICKA 5, PRAGUE 166 28, CZECH REPUBLIC Opublikowano: 2005 Autorzy / Redaktorzy / Twórcy
Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 20 Klasyfikacja Web of Science: Article Web of Science Keywords: alkali-silica reaction  mortar  pore solution  expansion measurement  |
The study deals with the investigation of changes of sodium and potassium hydroxide concentrations in the mortar pore solution and related material expansion. The experiments following the alkali-silica reaction were carried out on a model mixture of opal as reactive aggregate component and cements having different alkali content. The pore solution was obtained by extraction of the crushed mortar with hot water The molar sodium-potassium hydroxides ratio in the mortar pore solution is similar to the sodium-potassium ratio in cement. The decrease of alkali concentration in the solution with time and the increase of mortar expansion are proportional. Mortar expansion increases as a result of expansion pressure generated by products of the alkali-silica reaction. The time change of the alkali concentration in the solution is not affected by C,A content in cement.