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AssigneeNeotec Corporation
InventorsYukio Ohsaki, Fumio Iwase, Yoshihisa Nakanishi
Estimating the term…
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 accurately 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.
A method for preparing ready mixed concrete or mortar comprising the steps of condensing used cement sludge to a pre-determined concentration, determining the unhydration ratio of cement contained in the sludge, determining an appropriate amount of said sludge for addition to new cement based on the unhydration ratio of the sludge, and admixing said determined amount to new cement.
Dependencies are inferred from the claim text.