The concrete compressive strength at this early age is often comparable to that of slab-on-ground at 28 days (3,500 to 4,500 psi). Polishing of suspended slabs usually takes place much longer ...
Ice rink slabs hold several challenges for contractors ... The new mix design was a 3,500 psi concrete with 815 pounds per cubic yard total cementitous content using 25 percent slag and a blend ...
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