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The pozzolanic activity of different materials, its influence on the hydration heat in mortars
This work presents the relationship that exists between pozzolanic activity in certain materials (opaline rocks, fly ash and silica fume) and hydration heat, measured using tha Langavant calorimeter method. Pozzolantic activity is evaluated using an accelerated method that establishes the reaction speed of the different materials considered. While replacements of part of the cement in a mortar or concrete typically reduces the overall heat of hydration, it is shown that, compared to a control cement, silica fume and opaline rock mixes with cement give increased heat output during early hydration. This is due to their rapid and strng limepozzolanic reaction. The much less reactive fly ash decreased early heat output, compared to conctrol cement, a good correlation of between pozzolanic activity and hydration heat found.
The pozzolanic activity of different materials, its influence on the hydration heat in mortars
This work presents the relationship that exists between pozzolanic activity in certain materials (opaline rocks, fly ash and silica fume) and hydration heat, measured using tha Langavant calorimeter method. Pozzolantic activity is evaluated using an accelerated method that establishes the reaction speed of the different materials considered. While replacements of part of the cement in a mortar or concrete typically reduces the overall heat of hydration, it is shown that, compared to a control cement, silica fume and opaline rock mixes with cement give increased heat output during early hydration. This is due to their rapid and strng limepozzolanic reaction. The much less reactive fly ash decreased early heat output, compared to conctrol cement, a good correlation of between pozzolanic activity and hydration heat found.
The pozzolanic activity of different materials, its influence on the hydration heat in mortars
Verschiedene PuzzolanMaterialien - Einfluß auf Hydratisierungswärme in Mörteln
Sanchez de Rojas, M.I. (author) / Frias, M. (author)
Cement and Concrete Research ; 26 ; 203-213
1996
11 Seiten, 9 Bilder, 7 Quellen
Article (Journal)
English
The Pozzolanic Activity of Different Materials, its Influence on the Hydration Heat in Mortars
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