That kind of point loading on "green concrete" 7 day compressive strength must have been high, let alone at 4 days. 6 1/2 bag of Portland per cubic yard, wonder what PSI mix that would make. Amazing it did not fracture running on it that soon. I have put in structural slabs with 5000 PSI mix design and a nice grid of #4 bar at entrances to buildings where I knew we would be running across with heavy loads, often times part of a sidewalk, but just a section so we did not fracture the sidewalk where we crossed. Never fails on a site, sidewalk is put in too early or they forget and always has to be fixed, few extra yards and bar, good to go. Only difference I'd wait at least 2 weeks or the full month.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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