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Hi, I'm Tim Carter from AskTheBuilder.com and we're here today getting ready to pour a concrete slab
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But we've got an interesting situation. It's a little afternoon, it's about 42 degrees, it's going to get colder as the day goes on
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and we're going to run out of daylight in about four hours. All right, so that's the recipe for concrete not to get hard out of the truck
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And look what's happening right now. What you see is the concrete truck spinning the drum really rapidly
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and what happened about five minutes ago is that the operator put in a 50-pound bag of calcium chloride flakes
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into the drum and he's mixing it into the concrete here at the job site
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And what that calcium chloride's going to do is accelerate the hydration reaction in the concrete, which
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makes it go from the plastic state to the solid state. The concrete finishers need that to happen as
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quickly as possible so that they're not here at midnight tonight in the darkness
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trying to finish this concrete slab. Calcium chloride, You can add it to concrete to make it get harder faster
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I'm Tim Carter for AskTheBuilder.com. If you want to discover more home improvement tips, go to AskTheBuilder.com
