Patent ID: 7114842
Filing Date: 2006-10-03
Classification: B03B,B08B,B28C,Y02W

Abstract:
1. A method of controlling a concrete sludge water, comprising: (A) washing concrete containing aggregates from a mixing vessel into an aggregate separator using sludge water from a first sludge tank; (B) removing said aggregates from said concrete and recovering, in said first sludge tank, wash water from said aggregate-separated concrete; (C) adding retarder from a retarder tank into said recovered wash water in said first sludge tank, and repeating steps (A) and (B) to increase the concentration of said wash water; (D) transferring the wash water from said first sludge tank into a second sludge tank having a stirrer operative to prevent settling of the wash water therein, and further having a sensor for detecting the volume of the sludge water in said second sludge tank and a concentration sensor for detecting the concentration of the sludge water in said second sludge tank; (E) adding retarder from said retarder tank into said second sludge tank; (F) providing a sensor in said retarder tank operative to send signals to a control center such that the volume of retarder used in said first and second sludge tanks and the volume of the retarder used after completion of daily wash-out operations can be determined; and (G) sending signals from said sensors to said control center whereby the volume of retarder used in said sludge tanks and the volume of retarder used is determined using said control center.