Fibermesh markets a fiber with anti-bacterial coatings for use in the food industry. Please note that the fiber does not extend the required contraction joint spacing. They recommend sticking to the PCA's 24 to 30 times the thickness of the slab.
>>> smaxwell(--nospam--at)engin.umich.edu 06/19/00 09:08PM >>>
George & Harold,
Thanks for the info.
I think I should clarify little. The steel fibers are not intended for
the plastic shrinkage cracks, but as the primary reinforcement.
The polypropylene fiber (or peach fuzz as my boss calls it) is intended as
secondary reinforcment with the intend that it would help with plastic
shrinkage cracking and curing/drying cracking (particularly at the top of
We would like to minimize the cracking without getting too ridiculously
restrictive with the control/construction joint spacing.
Basically, I have four pole barns that will house livestock. Two are
about 40ft x 160 ft and the other two are 40 ft x 200 ft. The concern is
to minimize cracking to prevent urine and other bodily functions from
migrating to areas where germs/bacteria could congregate.
On Mon, 19 Jun 2000, George Muste wrote:
> Check the ACI 544.1R and 544.2R for design and properties of material.
> Please check the following sites for more details on these types of fibers.
> The technical managers or sale person may help. To reduce the plastic
> shrinkage, it is recommended to use polypropylene fibers - I never heard of
> using both types of fibers at the same time to reduce plastic shrinkage.
> The following are manufactures or distributors of polypropylene fibers, in
> addition to Synthetic Industries (fibermesh). Please check their websites
> or call them for additional information.
> OMI Concrete Specialists, IN, 219.436.7498
> Brett Admixtures, MN, 612.942.5470
> George Muste
> -----Original Message-----
> From: Scott E Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu]
> Sent: Monday, June 19, 2000 11:21 AM
> To: seaint(--nospam--at)seaint.org
> Subject: polypropylene fibers
> Has anyone used polypropylene fibers in addition to either steel fibers or
> regular reinforcement to help reduce initial plastic shrickage cracks?
> If so, what other manufacturer's are out there in addition to Fibermesh?
> Scott Maxwell