Polypropylene Fibres TREVON

BUILDING INDUSTRY

Applications

suitable for facades, driveways, parking lots, patios, septic tanks, gutters, subterranean walls, livestock and airport areas...

The TREVON Stavon polypropylene fibers are admixtures to add into concrete and mortar mixes. These fibers can improve properties of the mixes, provide secondary reinforcement and in particular control unsightly and troublesome shrinkage (crack formation).

The tendency for concrete and mortar to crack was accepted as natural to its use still a few years ago. Cracks in concrete or mortar that are formed during the first stage of drying shrinkage (in the plastic state) and consequently cause problems regarding lowering the integrity and strength of concrete.

These cracks are formed within the first 24 hours after the concrete has been placed. The settlement and shrinkage cracks may not be observed until some later date. They are often surface sealed by the finishing operation or are simply not wide enough to be seen until the concrete or mortar shrinks further or a load causes these weak planes to escalate into visible cracks.

The reason why cracks occur is that some stresses exist which exceed the strength of the concrete. This can be avoided by providing the TREVON polypropylene fibers to concrete structures.

These fibers are, thanks to their specific surface, able to absorb and relieve the tensile strengths during drying shrinkage (the energy is distributed into many millions of fibers). This reduction or elimination of plastic cracks then enables the concrete to develop its optimum long-term integrity.

When the TREVON fibers are added to the concrete mix the mixing action causes them to open and separate into millions of individual fibers. These fibers are uniformly distributed throughout the concrete in all directions, providing effective secondary reinforcement for shrinkage crack control. As the concrete hardens and shrinks, microscopic cracks develop. When the micro-cracks intersect a fiber, they are blocked and prevented from developing into macro-cracks and potential problems. The addition of the TREVON polypropylene fibers throughout the concrete also serves to minimize the width and length of those cracks that may appear in the hardened state.

Appropriate TREVON fibers

STAVON

fineness (diameter) cca 18 - 32 µm

Cut length 4, 8, 12 mm

Functions and properties


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