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Re: Fibrous concrete[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaoc(--nospam--at)seaoc.org>
- Subject: Re: Fibrous concrete
- From: "Mike Brown" <mike.brown(--nospam--at)cshqa.com>
- Date: Wed, 10 Jun 1998 17:34:10 -0600
Harold is correct. Fiber reinforcing will not resist cracking due to external stresses. But neither will wire mesh, unless you use a ratio greater than rho min. Typically, the amount of wire mesh is approximately .0018 the area of concrete which is only for temperature and shrinkage (internal stresses). I've also seen plans that call out a lot less steel than 0.0018. If one is worried about external stresses, I would recommend deformed reinforcing bars with a minimum area of steel equal to 0.003 times the area of concrete. Don't get me wrong. I'm not an advocate for fiber reinforcing. I just believe that we should be comparing apples to apples. I do not believe that fiber reinforcing will ever take the place of primary reinforcing steel. Mike Brown -----Original Message----- From: Harold Sprague <hsprague(--nospam--at)aspen.klaalov.com> To: 'seaoc(--nospam--at)seaoc.org' <seaoc(--nospam--at)seaoc.org> Date: Wednesday, June 10, 1998 3:16 PM Subject: RE: Fibrous concrete This is right out of the Fibermesh web site: Don't specify Fibermesh for: The control of cracking as a result of external stresses. The Fibermesh representatives define "external stresses" as flexural stresses due to applied loads or settlement when referring to slabs on grade. Harold Sprague KL&A -----Original Message----- From: ayvel(--nospam--at)ursgreiner.com [SMTP:ayvel(--nospam--at)ursgreiner.com] Sent: Wednesday, June 10, 1998 11:15 AM To: seaoc(--nospam--at)seaoc.org Subject: Re: Fibrous concrete Has anyone specified fibrous concrete for slabs on grade as an contractors option in lieu of std. wire mesh?
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