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Hydration mechanisms of hybrid cements as a function of the way of addition of chemicals
Author(s) -
FernándezJiménez Ana,
GarciaLodeiro Inés,
Maltseva Olga,
Palomo Angel
Publication year - 2019
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/jace.15939
Subject(s) - activator (genetics) , fly ash , chemical composition , chemical reaction , cement , chemical engineering , solid state , chemistry , mechanical strength , materials science , mineralogy , composite material , organic chemistry , biochemistry , engineering , gene
In this study fly ash contents of up to 50% were used to produce binders with mechanical strength greater than or equal to type CEM I 42.5R cement (reference). The specific aim pursued in this research was to determine whether the procedure used to add the chemical activator (in solid or liquid form) can affect strength development in the cement or the nature of the reaction products formed. Two experimental procedures were deployed: (a) the chemical activator was dissolved in the mixing water; (b) the chemical activator was ground, as a solid, into the fly ash. The solid‐state method induced slightly higher mechanical strength than when the activator was dissolved in hydration water. The way the chemical activator was added affected not only early age reaction kinetics, but also the nature and composition of the reaction products, the liquid state favoring the formation of phases AF t and AF m.