FIBERMESH POLYPROPYLENE FIBER
FIBERMESH fiber is an engineered fiber for concrete manufactured to an optimum gradation from 100% virgin polypropylene which provides protection against non -structural cracks in concrete, Increases abrasion- impact and shatter resistance while reducing permeability, imparts toughness to hardened concrete and is an alternate system to welded wire fabric when used or crack control in non-structural concrete.
FIBERMESH applications include, but are not limited to, slabs on grade, elevated slabs, precast concrete products, pavements, bridge decks, overlays, toppings, barrier walls, concrete tanks, pools, ditches, slope walls, stucco, shotcrete and gunite applications.
- FIBERMESH fibers work without affecting the chemical hydration of the cement. Their action is purely mechanical and is compatible with all concrete mixes and admixtures.
- FIBERMESH fibers cannot rust or stain; they are non-corrosive and alkali/proof.
- FIBERMESH fibers are light and easy to handle, packaged in pre-measured 1.5 lb. bags, the recommended application rate for one cubic yard of concrete.
FIBERMESH TEST REPORTS
- Use of FIBERMESH fibers to inhibit concrete cracking rind to provided abrasion, impact and shatter resistance while lowering permeability and imparting toughness, is supported by extensive laboratory studies- The following reports represent the most comprehensive research conducted with polypropylene fiber concrete – FIBERMESH concrete.
FIBERMESH Effect on Concrete Shrinkage Cracking:
Tests run at San Jose State University and the University of California, Berkeley, show without exception that FIBERMESH concrete typically inhibited cracking in the range of 90% to 100% compared to the non-fiber control specimen.
Relative Effect of FIBERMESH fibers on Early Age Plastic Shrinkage Cracking of Plastic Concrete:
Tests by Webster Engineering and Associates. Inc. have shown that the addition of FIBERMESH fibers to plastic concrete substantially increases the resistance of the concrete to early age plastic shrinkage cracking and cracking In response to vibration at early ages.
Addition of 1.5 lbs. per cu. yd. of FIBERMESH polypropylene fibers increases the strain capacity (ability to resist strain without developing visible cracking) of the immature concrete.
Water Migration/PermeabiIity of FIBERMESH Concrete:
The Von Test method was used to make this comparison at San Jose State University.
- Migration of water rates indicated reduction in concrete permeability of 33-44% at I lb. of FIBERMESH fibers per cubic yard as high as 79% at 2 lbs. per cubic yard.
Toughness of FIBERMESH Reinforced Hardened Concrete:
- Toughness is the measure of fibrous concrete’s ability to sustain load after first crack. Toughness indices can be used as a measure of the reinforcing fibers ability to hold cracks together under load.
To meet ASTM 0 1116 requirements for fiber reinforcement, a fiber should preferably be made from polypropylene and have been tested to score 3.0 or better on an ASTM C-1018 “Standard Test Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete (Using Beam with Third-Point Loading).
FIBERMESH fibrillated, graded fiber, when used at a ratio or 5 pounds per cubic yard (0.1% by volume), meets both the material recommendations and performance requirements of ASTM C-Ill 6 and C-1018Toughness Index I5.
Load Test of FIBERMESH fibers versus Welded Wire Fabric in Composite Deck Systems:
Load tests which used the FIBERMESH fiber reinforced concrete were equal or better than the welded wire fabric reinforced concrete tests indicating an equivalency for structural performance in composite slabs as well as the diaphragm behavior. As a follow-up to the load tests, a test program was conducted on the strengths of headed stud shear connectors in concrete comparing the use of FIBERMESH micro-reinforcing systems to the use of welded wire fabric.
The results of the Pushout Tests show that the strength and ductility of shear connectors in steel mesh and FIBER-MESH reinforced concrete are comparable. The use of FIBERMESH fibers also eliminates the construction problems experienced with welded wire fabric in metal decking and provides a constant solution to the problems concerning the amount and location of the reinforcement.
FIBERMESH fiber complies with the BOCA Basic National Building Code and Supplement, the Standard Building Code, and the Uniform building Code, as reported by the Council of American Building Officials, National Evaluation Service Committee–Report No. NES-284. FIBERMESH fiber is accepted by various State Departments of Transportation.
SHORT FORM SPECIFICATION
Synthetic fibrous reinforcing material shall be 100% virgin polypropylene fibrillated fibers containing no reprocessed olefin materials and specifically manufactured to use as concrete secondary reinforcement.
Volume of fibrous reinforcing material per cubic yard shall equal a minimum of 0.1% (1.5 pounds) (.9 kg per cubic meter). Fibers are for the control of cracking due to drying shrinkage and thermal expansion/contraction, reduction of permeability, increased impact capacity, shatter resistance, abrasion resistance and added post crack toughness.
Fiber manufacturer must document evidence of 5 year satisfactory performance history, compliance with applicable building codes and ASTM C-1116 Type III 4. I. 3 and ASTM C-1116 Performance Level 1 I5 (Ref: ASTM C1018) outlined in Section 21, Note 17.
Fibrous concrete reinforcement shall be manufactured by FIBERMESH, 4019 Industry Drive, Chattanooga,Tennesse, USA, 37416. (423) 892-7243. Complete Specification in CSI Manu-Spec format available both as hardcopy and IBM diskette (ASCII file) from your FIBERMESH representative.