PVA (Polyvinyl Alcohol) Fiber

Description

These fibers are fine reinforcing materials that improve strength, durability, and crack control in concrete and polymer-modified mixes. They disperse into monofilaments, making them less visible on finished surfaces compared to bundled fibers. Visibility varies with fiber size: smaller fibers like PVA 7 are less visible, while larger fibers like PVA 100 are more visible.

Smaller fibers create more strands per batch, aiding crack control but potentially making the mix stiff if overdosed. This can result in poor flow, trapped air, or incomplete mold filling. Larger fibers like PVA 100 are better suited for more fluid mixes, while PVA 15 and PVA 7 should be added more cautiously and at lower amounts.

Dosage Guidelines

• Use up to 2% of the total mix weight, depending on fiber size and mix consistency.
• Not all fiber types perform well at maximum dosage; testing small batches first is recommended.
• A common blend is 1% PVA 100 with 0.75% PVA 15, enhancing strength and crack resistance while maintaining workability and ease of casting.

Instructions

• These fibers are fine, high-performance reinforcing materials used to improve strength, durability, and crack control in concrete and polymer-modified mixes. 
• Because they separate into single strands during mixing, they are less noticeable on finished surfaces than bundled fibers. 
• Fiber visibility increases with size: smaller fibers like PVA 7 are less visible, while larger fibers like PVA 100 are more visible.

• Smaller fibers create many more strands per batch, which helps control cracking but can also make the mix stiff or difficult to work if too much fiber is added. 
• This can lead to poor flow, trapped air, or incomplete mold filling. 
• Larger fibers such as PVA 100 work best in more fluid mixes, while PVA 15 and PVA 7 should be added more carefully and at lower amounts.

Dosage Guidelines

• Use up to 2% of the total mix weight, depending on fiber size and mix consistency. Not every fiber type performs well at the maximum rate, so testing small batches first is strongly recommended.
• Many users achieve the best balance by combining fiber sizes. A reliable and widely used blend is 1% PVA 100 with 0.75% PVA 15, which increases strength and crack resistance while keeping the mix workable, stable, and easy to cast.