Does anyone have any experience with allowing the use of a non-chloride accelerating admixture in a slab-on-grade? I have an exposed exterior slab that will be poured during cod weather conditions. The slab is 8" thick, and is jointed into roughly 16'X16' panels. The problem that I have is that the accelerator will cause the elastic modulus to achieve higher values ealier in the life of the concrete, just at the time when it is desireable to have a low elastic modulus when the concrete is experiencing drying shrinkage. I see an increased potential for random cracking in what will be a slab exposed to view. Also, it is my undersatanding of ACI 306 that accelerating admixtures are not a substitute for maintaining proper temperature control.
If anyone has experience with this (good or bad) I would appreciate hearing about it. Thanks.
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