Effect of supplementary cementing materials on the composition of cement hydration products
作者： J. Duchesne , M.A. Be´rube´
DOI: 10.1016/1065-7355(95)90024-1
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摘要: Abstract Composition of cement hydration products in concretes made with two condensed silica fumes, three pulverized fly ashes (PFA), and one ground granulated blast furnace slag, stored at 38°C 100% relative humidity for 3 years was analyzed using an electron probe microanalyzer. The pore solution expression method also applied on pastes to analyze the composition water. mean CaO/SiO 2 (C/S) mole ration hydrates ordinary Portland (OPC) control concrete 2.05. In blended concretes, this ratio decreased between 1.24 1.46, however no clear distinction from supplementary cementing material (SCM) type another. All except very alkalirich PFA tested showed a drop alkali concentration compared paste. Mass balance calculations indicated that lower C/S produced presence SCM can contain much more than OPC hydrates, provided is available. These SCMs may decrease alkalinity pH solution, reduce expansion due reactivity.
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