DO YOU HAVE ANY EXPERIENCE WITH CONCRETE?
WHAT YOU NEED TO DO INSTEAD OF ADDING 20 GALLONS OF WATER IS ADD A PLASTISIZER !!!!
THIS WILL WET UP YOUR CONCRETE WITHOUT ADDING WATER, WHICE WILL NOT EVENTUALLY EVAPORATE AND CAUSE SHRINKAGE CRACKS./ GET A FRIKKIN' CLUE IDIOT!
You should probubly take your own advice....20 gallons to 11 yards that would change the W/C by 0.02 that is NOT why it is cracking, You must be an admix salesman for GRT or something....