Sika® Crackstop Fiber 6 mm

CE Marking and Declaration of Performance to EN 14889-2 – Polymer Fibers for use in concrete mortar and grout

Polypropylène

3 year

The product must be stored in original, unopened and undamaged packaging in dry conditions.

~0,91 g/cm3

Length = 6 mm, Equivalent diameter = 19,5 μm

Add the fibers to the screed, concrete or mortar:

• in the mixer with the aggregates before introduction of the water : 55 seconds mixing time
• or in the mixer after introduction of water (open the bag to simplify the mixing) :  : 55 seconds mixing time. This mixing is the recommended one for screed and mortars with aggregates < 6mm.
• or in the truck : 1 min/ m³ and at least 5minutes for a full truck

In case of specific concrete (high performance, low water on concrete ratio, ...) or specific use with high dosage (to Reduces spalling at high temperature for example), it is recommanded to check if the mixing time is long enough to ensure a good fiber distribution.

Caution: Never add the fibers directly to the mixing water.

The usual dosage range depending on the concrete formula used and according to the desired performance is:

• To reduce plastic and drying shrinkage cracking, reduce plastic settlement or increase impact resistance: 1 dose of 600 g for 1m3 of concrete is usally used.
• To reduces spalling at high temperature: dosage is at least 1,2 Kg/m³ and sometime higher, depending of results of perfomance tests.

However, it is recommended to carry out tests to determine the optimum dosage of each concrete mix/application.