Re: Fiber or steel reinforcement for concrete

Posted by PJH on September 26, 2009 at 05:44:26 from (71.171.249.41):

In Reply to: Fiber or steel reinforcement for concrete posted by e on September 25, 2009 at 15:46:08:

I see everybody specifying rebar sizes and placement, but nobody is mentioning how much fiber per yard of concrete. I don't know the cost of fiber, but the plant could put a thimble full in a load and it would contain fiber. Some folks would do that, and for that reason, I think you should specify how much fiber per yard.

I worked on an experimental project for the state of Illinois. If I remember right, the contract specified 3 lbs of fiber per cu. yard. I don't know how they proportion the fiber in the private mixes.

The finishers grumbled a little about fiber buildup on their tools, but it was a burlap finish and caused no problem. Might be a problem with a trowel finish - I don't know.

I'd expect it to crack, no matter what you use.

Paul

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