Method of and device for improving the quality of fresh concrete and preventing adhesion and hardening of the fresh concrete in a mixer drum of a concrete mixer truck or of a concrete mixing plant
AssigneeKabushiki Kaisha Remic-Asano
InventorNorio Sakamoto
Life of this patent
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Abstract
A method of and device for improving the quality of fresh concrete and preventing adhesion and hardening of the mixed fresh concrete in a rotary mixer drum of a concrete mixer truck or a stationary mixer drum of a concrete mixer plant which involves delivering selectively and continuously either cold or warm air into the mixed fresh concrete in the rotary or stationary concrete mixer drum in order to delay the hardening time of the mixed fresh concrete, and to avoid adhesion and hardening of the mixed fresh concrete on a plurality of blades and an inner periphery of the mixer drum.
Claims16
A method of preventing adhesion and hardening of mixed fresh concrete on a plurality of rotary blades and an inner periphery of a mixer drum which comprises:
- (a) delivering continuously cold air into the mixed fresh concrete in the mixer drum when the open air temperature outside the mixer drum is high;
- (b) delivering continuously warm air into the mixed fresh concrete in the mixer drum when the open air temperature outside the mixer drum is low in order to maintain the temperature of the mixed fresh concrete within a predetermined range and to delay a hardening time of the mixed fresh concrete;
- and
- (c) spraying water into the mixer drum.
A device for preventing adhesion and hardening of mixed fresh concrete on a plurality of rotary blades and an inner periphery of a mixer drum which comprises:
- (a) an air blower;
- (b) a blower duct provided on said mixer drum, one end portion of said blower duct being connected to said air blower, and another end portion located to partially enter the mixer drum;
- and
- (c) a water tank operatively connected to the mixer drum for supplying water thereto.
Dependencies are inferred from the claim text.