My Dream Garage had the Garage Floor Poured On Friday and On Sunday the Floor started to Crack It has been determined the cement dried to quickly. Now a crack runs back and forth either side of the cut line in the center of the floor. 6-8 inches on either side of the cutline. 28 x 36 pad. The floor has Pex tubing in it. Piece are chipping off now and it seems the cracks are spider cracking it's been getting worse since exposed to rain. The contractor want's to cut either side of the failure grind an inch off the floor pour epoxy and then paint the floor so it looks good. What is the correct fix for this?