Effect of Fly Ashes with High Total Alkali Content on the Alkalinity of the Pore Solution of Hydrated Portland Cement Paste |
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| Authors: | P Lorenzo S Gñoni S Hernández A Guerrero |
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| Affiliation: | Institute of Construction Science Eduardo Torroja (CSIC), c/Serrano Galvache s/n, 28033 Madrid, Spain |
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| Abstract: | The influence of two Spanish fly ashes (ASTM class F) with high total alkali content (equivalent to 2.0% and 2.6% Na2O) on the alkalinity levels of the pore solutions expressed from hydrated portland cement pastes was studied during a period of 90 days from mixing. Mixtures with 0%, 15%, and 35% replacement of cement by fly ash were prepared with a water/mixture ratio of 0. 4. The effect of the fly ash on the pore solution depended mainly on the age and fineness of the fly ash. |
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