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The alkali–carbonate reaction is a process suspected for the degradation of concrete containing dolomite aggregate. Alkali from the cement might react with the dolomite crystals present in the aggregate inducing the production of brucite, (MgOH)2, and calcite (CaCO3). This mechanism was tentatively proposed by Swenson and Gillott (1950) and may be written as follows: :CaMg(CO3)2 + 2 NaOH → CaCO3 + Na2CO3 + Mg(OH)2 Brucite (Mg(OH)2), could be responsible for the volumetric expansion after de-dolomotisation of the aggregate, due to absorption of water. ==See also== * Alkali–aggregate reaction * Alkali–silica reaction * Pozzolanic reaction 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Alkali–carbonate reaction」の詳細全文を読む スポンサード リンク
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