LOW DENSITY CEMENTITIOUS COMPOSITIONS USING LIMESTONE

A manufactured cementitious binder includes a hydraulic binder in an amount in the range of from 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from 1 to 30% by weight of the cementitious binder; silica fume in an amount up to 15% by weight of the cementitiou...

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Bibliographische Detailangaben
Hauptverfasser: BILL CARRUTHERS, PAUL LEHOUX, GREG DADERKO, WES WOYTOWICH
Format: Patent
Sprache:eng ; spa
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Zusammenfassung:A manufactured cementitious binder includes a hydraulic binder in an amount in the range of from 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from 1 to 30% by weight of the cementitious binder; silica fume in an amount up to 15% by weight of the cementitious binder; limestone in an amount of from 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in a controlled amount of at least 0.5% by weight of the cementitious binder, the cementitious binder providing a cementitious settable composition when added with water, wherein for a density lower than 13 pounds per gallon and of at least 11 pounds per gallon obtained without a lightweight additive, said cementitious settable composition exhibits a 24 hour compressive strength at 100F, as hardened, of at least 500psi. Un aglomerante cementicio fabricado consta de un aglomerante hidráulico en una cantidad incluida en el rango de 40 a 75% por el peso del aglomerante cementicio; metacaolín en una cantidad incluida en el rango de 1 a 30% por el peso del aglomerante cementicio; humo de sílice en una cantidad de hasta 15% por el peso del aglomerante cementicio; piedra caliza en una cantidad de 5 a 30% por el peso del aglomerante cementicio, y un acelerador cementicio en una cantidad controlada de al menos 0.5% por el peso del aglomerante cementicio, el aglomerante cementicio proporcionando una composición cementicia fraguable al momento en que se lo agrega con agua, donde para una densidad menor a 13 libras por galán y de al menos 11 libras por galán obtenida sin aditivos livianos, dicha composición cementicia fraguable exhibe una resistencia a la compresión de al menos 500 psi a las 24 horas a 100 °F, cuando se endurece.