DESCRIPCIÓN
STEEL MACRO-FIBER
DESCRIPTION
 
PSI CRIMPED STEEL FIBER are low carbon, cold drawn steel wire bers designed to provide concrete with temperature and shrinkage crack control, enhanced exural reinforcement, improved shear strength and increase the crack resistance of concrete. PSI Crimped Steel Fiber complies with ASTM C1116, Standard Speci cation for Fiber Reinforced Concrete and Shotcrete and ASTM A820, Type I, Standard Speci cation for Steel Fibers for Fiber Reinforced Concrete. These steel macro- bers will also improve impact, shatter, fatigue and abrasion resistance while increasing toughness of concrete. Dosage rates will vary depending upon the reinforcing requirements and can range from 25 to 100 lbs/yd3 (15 to 60 kg/m3).
 
PRIMARY APPLICATIONS
 
Commercial and industrial slabs on ground
• Bridge decks, overlays and pavements
• Precast concrete applications
• Shotcrete, tunnel linings and slope stabilization • Mass concrete and composite deck construction
 
FEATURES/BENEFITS
 
• Increases impact, shatter and abrasion resistance of concrete
• Reduces segregation, plastic settlement, and shrinkage cracking of concrete
• Provides three-dimensional reinforcement against macro-cracking
• Increases overall durability, fatigue resistance and texural toughness
• Reduction of in-place cost versus wire mesh for temperature / shrinkage crack control • Easily added to concrete mixture at any time prior to placement
 
TECHNICAL INFORMATION
 
Typical Engineering Data
Material ………………………………………………………… low carbon cold drawn steel wire
Deformation………………………………………………….. continuously deformed circular segment
Typical Dosage Rates ……………………………………. 25 – 100 lb/yd3 (15 – 60 kg/m3)
Available Lengths………………………………………….. 1 1⁄2” (38 mm), 2” (50 mm)
Aspect Ratio…………………………………………………… 34, 45
Tensile Strength…………………………………………….. 140 – 180 ksi (966 – 1242 MPa)
Appearance ………………………………………………….. bright, clean wire
 
PACKAGING
 
PSI Crimped Steel Fibers are packaged in 55 lb (25 kg) bags; 2200 net lbs (1000 kg) per pallet.
 
SHELF LIFE
 
3 years in original, unopened package.
 
DIRECTIONS FOR USE
 
PSI Crimped Steel fibers can be added to the concrete mixture at any time prior to placement of the concrete. It is generally recommended to add any fiber material at the ready-mix concrete plant during batching. The actual dosage rate will vary depending upon the application and performance requirements for each project. Fibers must be mixed with concrete for a minimum of four (4) to ve (5) minutes at maximum mixing speed, depending on the mixer type, to ensure complete dispersion and uniformity. The addition of PSI Crimped Steel Fiber, at provided dosage rates, will decrease the measured slump of concrete; however, additional water should not be added. The use of water reducers and/or superplasticizers, such as Eucon 1037, Eucon MRX or the Plastol series of admixtures may be necessary to maintain desired workability.
Add other admixtures independently from fiber addition. When used properly, and placed in a concrete mix of sufficient workability, the fibers will not adversely alter the compressive or texural strength of concrete or shotcrete.
 
CLEAN-UP
 
Loose fiber material may be disposed in proper receptacles for refuse. Finishing equipment with fibers embedded in concrete should be thoroughly cleaned.
 
PRECAUTIONS/LIMITATIONS
 
• Use of fibers may cause an apparent loss in measured slump of concrete. This may be offset with the use of a water reducing admixture if necessary.
• Fibers should never be added to a “zero-slump” concrete. Ensure a minimum concrete slump of 3” (80 mm) prior to addition of any fiber material. Fibers may also be added in loose form to aggregate charging devices.
• In all cases, consult the Material Safety Data Sheet before use.