The literature published by Fibermesh et al, specifically mentions that all
established crack control procedures such as expansion/contraction joints,
etc., must be implemented.
Polypropylene FRC is NOT for "crack-control" in the conventional sense, but
is SUPPOSED to alleviate the shrinkage/drying cracks that typically occurs
during the initial concrete cure.
Whether it performs as advertised or not depends on to whom you speak.
FWIW, I no longer bother with it.
From: Fountain Conner [mailto:fconner(--nospam--at)pcola.gulf.net]
Sent: Tuesday, January 11, 2000 12:14 PM
Subject: Re: Concrete flat slab strengthening
>From a qualitative standpoint, I could see no improvement in crack-control
from plain concrete.