Cold weather concrete placing

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Old 01-26-15, 02:17 PM
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Old 01-26-15, 06:10 PM
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The article makes a blanket statement about adding accelerators, but doesn't go into any detail in describing them. Some accelerators contain a significant amount of calcium chloride, which can cause concrete performance problems, such as increased corrosion of steel reinforcement (rebar and/or wire mesh). A good practice would be to use concrete from a supplier using only accelerators approved by the state DOT, as most have done extensive lab testing of all concrete additives on their approved product lists.
 
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Old 01-27-15, 03:34 PM
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When inspecting in our area, if a truck pulled into a job with a bag of Calcium Chloride we made then leave!
 
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Old 01-28-15, 08:46 AM
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you're both right of course,,, GaDOT allows CaCl to be added onsite,,, iirc, 1 1/2% flake,,, NYSDOT had allowances for liquid accelerators,,, its not an in-depth article, guys,,, & yes, on public $ jobs, everything came off the dot's approved materials lists
 
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