Sand and Concrete Pad

We received our first 20 tons of gravel from IMI irvington Meterials Inc.  They call it Concrete sand, first I did not like it but it was ok I guess. Deniz bought a Tarp to cover it. Than we pour the concrete pads. Feels like It was going slow. I kept blaming rain, but I was right we got so much rain and all of them came when ever I was going to start. When I talked to some profesional patio builders in the neigbourhood they complain about it too.