A METHOD FOR RECYCLING WASH RESIDUE OF READY MIXED CONCRETE AND SYSTEM THEREFOR

The present invention relates to a method and a system for recycling wash residue of ready mixed concrete include the steps of condensing used cement sludge to a predetermined concentration, storing the condensed sludge, sampling the stored sludge and determining the unhydration ratio of cement cont...

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Bibliographische Detailangaben
Hauptverfasser:	FUMIO IWASE, YUKIO OHSAKI, YOSHIHISA NAKANISHI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIME, MAGNESIA MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MEASURING METALLURGY PERFORMING OPERATIONS PHYSICS PREPARING CLAY PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER REFRACTORIES SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SLAG TESTING TRANSPORTING TREATMENT OF NATURAL STONE WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	The present invention relates to a method and a system for recycling wash residue of ready mixed concrete include the steps of condensing used cement sludge to a predetermined concentration, storing the condensed sludge, sampling the stored sludge and determining the unhydration ratio of cement contained in the sludge, and weighing the stored sludge based on the determined unhydration ratio of cement in order to prepare a new batch of ready mixed concrete or mortar. By determining the unhydration ratio of cement contained in the sludge which has been condensed to a predetermined concentration, it becomes possible to ac curately know the ratio of cement contributing as cement and its ratio contributing as the aggregate in a new batch of ready mixed concrete. A new batch of ready mixed concrete can be prepared by weighing the amount of the sludge on the basis of the determined unhydration ratio. The ready mixed concrete thus prepared will have a desired hardening strength and drying shrinkage.