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Early Hydration of a Superhigh‐Early‐Strength Portland Cement Containing Chromium
Author(s) -
TERAMOTO HIDEO,
KOIE SHICHlRO
Publication year - 1976
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.1151-2916.1976.tb09423.x
Subject(s) - ettringite , cement , clinker (cement) , portland cement , chromium , materials science , metallurgy , mixing (physics) , manganese , chemical engineering , mineralogy , chemistry , engineering , physics , quantum mechanics
Readily water‐soluble, chromium‐containing phases exist among the principal clinker minerals of a superhigh‐early‐strength portland cement manufactured by adding small amounts of chromium, manganese, and fluorine to the cement raw mix. The effects of these phases on the early hydration of the cement were investigated. The phases dissolve in the mixing water and release K + , Na + , CrO 4 2‐ , and SO 4 2‐ into the liquid phase. Because of the presence of CrO 4 2‐ , the Ca(OH) 2 and ettringite crystals formed during hydration grew thicker than those in cement pastes lacking the ion. This growth behavior enhances the early mechanical strength of the cement.