Anyone lay their own concrete?

Josh owen said

Its a sandy area but im gonna try lime over the sand as a base rather than class 5 gravel since lime packs so well. And fiber rather than rebar for the shed little cheaper and easier to work with

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Sounds ok, my guy had 6 workers, installed plastic then the stone with skide steer. Did it in quarters (40x60) 5-6” thick top grade concrete (he specified no white concrete) 15 years no cracks yet (reason for the best concrete) in 2007 $8500 for all the work, smooth as silk. 2 six packs and a fifth of Jack bonus. I tried doing a 12x12 shed by myself and almost died till the guys in the ready mix truck jumped in and finished it. Worst than moving mud!