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Old 12-01-2008, 07:21 PM   #1
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concrete additives


The concrete company says that I have the option of getting plasticizing additives as well as some type of fiber additives if I want.

What are the pros and cons of getting such additives?
In what way would density or other properties be effected?

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Old 12-01-2008, 07:54 PM   #2
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concrete additives


What are you trying to accomplish?

Your local ready-mix supplier should be able to give you what you need and cost differences.

Fibers are not a substitute for rebar. - PERIOD!!

Plasticizers are good for workability.

Fly ash is a retarder, especially in cooler weather.

Air entrainment is necessary for exposed concrete if you are in a cold climate.

superplasticizers are not for amateurs.

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Old 12-02-2008, 07:18 AM   #3
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concrete additives


dick's right, w/o knowing the application, can't tell,,, rebar adds strength during cure & after - fibers're useless far's i'm concerned but we use 'em when spec'd,,, different plasticizers, water-reducers, retarders, & accelerants all depend on final use,,, let your conc pro decide.

amateurs always think conc's easy 'cause good pro's make it look like it is
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