Concrete Depot PVA Fiber 

PVA Fibers For Long-Term Crack Control: PVA fibers are designed for long-term crack control of concrete. A dose of one pound per cubic yard can reduce drying shrinkage cracking at 28 days by 40% or more. This represents a 50% improvement over traditional polypropylene fibers. PVA also provides superior plastic shrinkage control in concrete. The dramatic improvement in long-term crack control is a result of the molecular bond created by PVA with Portland cement. The bond strength is 300% greater than that of steel, glass, nylon or polypropylene. This high bond strength eliminates the need for longer fibers, making mixing easier with less impact on slump. The combination of high bond strength and low stretch makes PVA the superior choice for ready mix or any other concrete application where cracking is a concern. The higher density of PVA makes it easier to run through a fiber dispenser and less likely to float or cause a hairy surface. (The density of PVA is 1.3, polypropylene is 0.9 and water is 1.0.)  

Description:Material: Polyvinyl alcoholConfiguration: Resin bundled chopped fiberColor: White or yellowish whiteSpecific Gravity: 1.3Length: 1/3” (8mm)Tensile Strength: 203,000 psi (1400 MPa)Chemical Stability: StableAbsorption: Minimal 

Dosage:Dosages of one to two pounds per yard are recommended for reduction of both plastic and long-term drying shrinkage in concrete. 

Benefits of PVA in Concrete:Long-term crack reduction reduces the amount of water penetration, which causes steel reinforcement to rust and expand and results in permanent damage to concrete from spalling, as well as premature deterioration in a freeze-thaw environment. 

Applications:PVA fibers are designed for all ready-mix and precast applications, as well as mortar or stucco mixes, and are a replacement for glass fiber reinforcement. Typical applications include:• New construction and repair of airport aprons and taxiways• Security and seismic safeguards in new structures and upgrades to existing structures• Industrial and warehouse slabs• Tunnel linings• Septic tanks, vaults, architectural and specialty precast shapes 

The information herein is given in good faith, but no warranty, express or implied, is made. Healthand safety precautions in this data sheet may not be adequate for all individuals and/or situations.Final determination of suitability of any material is the sole responsibility of the user. Observing existing regulations and laws have are the responsibility of the user.