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 - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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