IMPROVING THE FREEZE-THAW DURABILITY OF DRY CAST CEMENTITIOUS MIXTURES

An improved freeze-thaw durability dry cast cementitious composition is provided that uses very small (0.1 gm to 100 µm average diameter) polymeric microspheres that are blended directly into the mixture and optionally gas-generating additives. The polymeric microspheres provide void spaces in the m...

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Bibliographische Detailangaben
Hauptverfasser:	LYNN E. BROWER, THOMAS M. VICKERS, JR, BRUCE J. CHRISTENSEN, PATRICK MILLER
Format:	Patent
Sprache:	eng ; spa
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Zusammenfassung:	An improved freeze-thaw durability dry cast cementitious composition is provided that uses very small (0.1 gm to 100 µm average diameter) polymeric microspheres that are blended directly into the mixture and optionally gas-generating additives. The polymeric microspheres provide void spaces in the material matrix that act to increase freeze-thaw durability of the material. In this dry cast cementitious composition, polymeric microspheres act as pre-formed voids. Se proporciona una composicion cementosa de colada en seco de durabilidad al congelamiento-deshielo mejorado que utiliza muy pocas microesferas polimericas (0.1 gm a 100 mum diametro promedio que se mezclan directamente en el revolvedora y opcionalmente los aditivos que generan gas. Las microesferas polimericas proporcionan espacios vacios en la matriz material que actua para incrementar la durabilidad al congelamiento-deshielo del material. En esta composicion cementosa de colada en seco, las microesferas polimericas actuan como vacios preformados.