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FERRO-GREEN
OVERVIEW
FORTA® FERRO-GREEN® is a unique blend of recycled polypropylene and copolymer macro fibers designed specifically for pervious concrete applications. The FERRO-GREEN® blend consists of 100% recycled polypropylene fibrillated (network) fibers and a high-performance twisted-bundle macro-monofilament fiber, designed to mix, distribute, and finish well in pervious concrete mixes.
This fiber combination offers a variety of desirable benefits to pervious concrete pavement applications, including increased strength, toughness, freeze-thaw resistance, and durability.
APPLICATIONS
FERRO-GREEN® is used to toughen any pervious concrete application, such as driveways, curbs and sidewalks, and commercial parking lots and pavements. The three-dimensionally distributed non-corrosive macro fiber blend is one of the few methods available to add true toughness reinforcement to pervious cross-sections, without reducing porosity.
FERRO-GREEN® also increases resistance to freeze-thaw damage and raveling, while preserving both the plastic and hardened concrete void structure.
INSTALLATION
FERRO-GREEN® is generally dosed in a range of 0.17% to 0.5% by volume of concrete, or 2.5 lb. to 7.5 lb. per cubic yard of pervious concrete, depending on the desired level of additional toughness and crack-control required for the application.
PHYSICAL PROPERTIES
Materials: Virgin Copolymer and recycled polypropylene blend
Form: Macro-monofilament/fibrillated-net blend
Specific Gravity: 0.91
Tensile Strength: 83-96 ksi. (570-660 MPa)
Length: 0.75″ (19mm), 1.5″ (38mm), 2.25″ (54mm)
Color: Gray/dark gray blend
Acid/Alkali Resistance: Excellent
Absorption: Nil
Compliance: A.S.T.M. C-1116
There are many factors to take into consideration. Steel fibers typically require special conveyors or extra man-hours to add them due to the high dosage per cubic yard. Steel mats or rebar are very labor intensive to place on chairs and supports and to tie properly. The 3-dimensional FORTA-FERRO® fibers can be placed with a laser guided screed and can eliminate the need for a concrete pump in these situations. The FORTA-FERRO® benefits can reduce labor hours and placement time, providing significant job savings.
FORTA-FERRO® fibers are added at the concrete batch plant and require 4-5 minutes at normal mixing speed for proper distribution. They will reduce visual slump approximately 3″ at the 7.5 lb. dosage, and will typically require a super-plasticizer or mid-range water reducer to provide flowability for placement. Using excessive mix water will naturally reduce concrete strength and create bleed water that will make the surface less durable. Good concrete finishing practices should be exercised.
In most situations, FORTA-FERRO® can safely and reliably replace all non-structural steel in slab-on-grade concrete. Factors such as requirements from rack or point load, average daily traffic, slab thickness and sub-base must be considered. As always, it is best to contact the FORTA® Engineering Department before eliminating steel reinforcement.
FORTA-FERRO® (which means “Strong as Steel”) fibers are non-corrosive, non-magnetic and 100% alkali proof. In comparison testing vs. three types of steel fibers it was determined that it requires 1 pound of FORTA-FERRO® fiber to offer equivalent A.R.S. (Average Residual Strength) values to that of 10 pounds of steel fibers. This one-to-ten dosage ratio offers tremendous advantages for FORTA-FERRO® fibers in the batching, pumping, placing and finishing processes.
Contact FORTA® for comparative test results.
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