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Re: Re: SLAB - Control Joints in Concrete Slab on Grade

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I attended a brief presentation by our local Fibermesh rep (Atlanta, GA) a
few weeks ago.  Regarding the "hairy concrete" problem, he explained that
this was a more common occurance when using 2" long fibers.  The current
trend is to go with a much shorter 3/4" fiber.  According to him, there was
no significant difference in performance and one of the benefits of the
shorter fibers was to eliminate or greatly reduce the "hairs" which not only
were aesthetically unpleasant, but also make finishing difficult.

Note that I do not have any personal experience with this.  I am simply
regurgitating what I was told by a salesperson.


-----Original Message-----
From: Richard Lewis <rlewis(--nospam--at)>
To: seaoc(--nospam--at) <seaoc(--nospam--at)>
Cc: seaoc(--nospam--at) <seaoc(--nospam--at)>
Date: Tuesday, April 28, 1998 9:59 AM
Subject: Re: Re: SLAB - Control Joints in Concrete Slab on Grade

>seaoc(--nospam--at),Internet writes:
>Is it appropriate to use fiber mesh (I am assuming that this material is
>the short, chopped glass admixture which I have seen) in walkways?  In
>the installations which I have seen, ends of the chopped glass fibers
>are exposed on the surface, detracting from the appearance, catching
>debris, etc.
>Yes, you do get "fuzzy concrete".  It looks like it needs a shave.  But
>is only temporary.  UV light will remove the the hairs in time.  If you
>wait you can get a blow torch and with one quick stroke they are gone.  In
>time you will not be able to tell Fibermesh was ever used.
>Richard Lewis, P.E.
>Missionary TECH Team
>The service mission like-minded Christian organizations
>may turn to for technical assistance and know-how.