Agent for retarding pozzolana-type setting

An agent and a process for retarding the pozzolana-type setting of mixtures of fly ashes and calcium hydroxide and, if appropriate, calcium sulphates use ligninsulphonic acids and/or ligninsulphonates. The retardation of the setting is observed only during the first 24 hours. The compressive strengt...

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Bibliographische Detailangaben
Hauptverfasser:	JURKOWITSCH,HEINZ,.DR, HUELLER,ROLF,.DR
Format:	Patent
Sprache:	eng ; ger
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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Beschreibung
Zusammenfassung:	An agent and a process for retarding the pozzolana-type setting of mixtures of fly ashes and calcium hydroxide and, if appropriate, calcium sulphates use ligninsulphonic acids and/or ligninsulphonates. The retardation of the setting is observed only during the first 24 hours. The compressive strengths after 28 days and the permeability and elution properties are not affected.