High Modulus Polymer Fibers for Crack Width Limitation
Concretum® SUPERFIBER 40/8 are high modulus polymer fibers for mortar and concrete. They have a higher Young's Modulus as compared to concrete. For this reason, there is a long-term reduction of cracking widths which result of the shrinkage.
Applications
In general as a replacement of polypropylene fibers
For long-term cracking width limitation
To avoid early-age cracking
To increase the fire-resistance of concretes and mortars
Properties
Concretum® SUPERFIBER 40/8 are shortcut fibers made of a high-performance polymer (synthetic material). The Young's Modulus of this fiber is higher as compared to mortar and concrete and their tensile strength is higher as compared to prestressing steel. The thin fibers feature a better bond to the cement matrix and therefore guarantee a homogeneous and competitive construction material.
Because of Concretum® SUPERFIBER 40/8 the cracks are more evenly distributed in the young concrete. Instead of one big crack various small micro cracks will emerge. Concerning the durability, those small cracks are harmless. Unlike traditional synthetic fibers, Concretum® SUPERFIBER 40/8 bring about long-term cracking width limitation. The fibers are only dosed with 0.6 kg/m³.
Advantages
Long-term cracking width limitation
Low danger of injury
The fibers are heavier than water and sink in the sedimentation tank
Fibers that stick out can be burned off
Very high resistance to alkali
No corrosion
Simple surface finish
Low dosage: 0.6 kg/m³ concrete
The fibers do not have any adverse health effects.
