Calibrated concrete moisture control system

A concrete moisture control system, comprising:

• a hydraulic water pump which generates a water flow in a conduit;
• a proportional control valve configured to operate between a closed condition and an open condition;
• a controller operable to:
• retrieve a concrete mix recipe from a database, said concrete mix recipe defines relative proportion of materials to be dispensed from a plurality of bins;
• retrieve from said database a production rate table which defines an amount of materials to be dispensed per unit time from said plurality of bins;
• operate a water flow calculator to calculate a target water flow rate based on said amount of materials dispensed per unit time from said plurality of bins;
• retrieve from said database a water flow calibration table which correlates each of a plurality of proportional control valve positions between said closed condition and said open condition to each of a plurality of water flow rates through said proportional control valve;
• retrieve a pressure signal from a pressure sensor fluidically coupled to said water flow in said conduit;
• operate a fluid pressure calculator to calculate fluid pressure in said conduit;
• operate a hydraulic fluid flow calculator to calculate hydraulic fluid flow to said hydraulic water pump based on said fluid pressure in said conduit and
• actuate said proportional control valve based on said water flow calibration table, and actuate a hydraulic fluid flow controller to regulate speed of said water pump based on the calculated hydraulic fluid flow, wherein actuation of said proportional control valve and regulation of said speed of said water pump maintains said target water flow rate to said amount of materials dispensed from said plurality of bins.