I purchased 1,800 lbs of quikrete (24 60# bags) on Craigslist. I have a 10' long heavy cardboard tube that is ~11.5" diameter. I plan to purchase concrete molding tubes in smaller diameters (they come in 6", 8", 10", and 12"). All of the cardboard tubing will be cut into 2"-2.5" lengths as molds. I plan to create larger diameter molds from plastic lawn edging. All will be sprayed with nonstick cooking spray.
It is best to pour the molds in place; but it is also best to excavate the pathway down the 2" for the stepping stones. I do not have the time to excavate the pathway before moisture will overtake the bags of Quikrete, so I plan to manufacture the circular stepping stones and store them until I can hire out the excavation.
I plan to pour the molds on the driveway and on my back patio. I will lay down heavy plastic and the cut forms...all will be sprayed with nonstick cooking spray.
Can anyone tell me how long I need to let them set before I can remove them from the molds and stack them for storage? I may need to re-use the driveway for additional batches.
Please share any insights or experiences that you might have.
