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Effect of Fly Ashes with High Total Alkali Content on the Alkalinity of the Pore Solution of Hydrated Portland Cement Paste
Author(s) -
Lorenzo P.,
Gñoni S.,
Hernández S.,
Guerrero A.
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08146.x
Subject(s) - alkalinity , fly ash , fineness , portland cement , cement , alkali metal , materials science , mixing (physics) , metallurgy , mineralogy , chemistry , composite material , physics , organic chemistry , quantum mechanics
The influence of two Spanish fly ashes (ASTM class F) with high total alkali content (equivalent to 2.0% and 2.6% Na 2 O) 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.