EFFECT OF FLY ASHES WITH HIGH TOTAL ALKALI CONTENT ON THE ALKALINITY OF THE PORE SOLUTION OF HYDRATED PORTLAND-CEMENT PASTE

Authors
LORENZO P GONI S HERNANDEZ S GUERRERO A
Citation
P. Lorenzo et al., EFFECT OF FLY ASHES WITH HIGH TOTAL ALKALI CONTENT ON THE ALKALINITY OF THE PORE SOLUTION OF HYDRATED PORTLAND-CEMENT PASTE, Journal of the American Ceramic Society, 79(2), 1996, pp. 470-474
Citations number
23
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
79
Issue
2
Year of publication
1996
Pages
470 - 474
Database
ISI
SICI code
0002-7820(1996)79:2<470:EOFAWH>2.0.ZU;2-V
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 le vels of the pore solutions expressed from hydrated portland cement pas tes 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 sol ution depended mainly on the age and fineness of the fly ash.