| HS Code | 950333 |
| Fiber Type | Monofilament polypropylene |
| Material | 100% virgin polypropylene |
| Color | Natural/white |
| Fiber Length | 12 mm |
| Fiber Diameter | 0.018 mm |
| Aspect Ratio | 667 |
| Density | 0.91 g/cm³ |
| Tensile Strength | 350 MPa |
| Elastic Modulus | 3500 MPa |
| Melting Point | 160 °C |
| Ignition Point | >350 °C |
| Water Absorption | <0.1% |
| Alkali Resistance | Excellent |
| Acid Resistance | Excellent |
| Electrical Conductivity | Low/insulating |
| Thermal Conductivity | Low |
As an accredited SikaFiber 012 - Monofilament Polypropylene Fibers for Cementitious Systems factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SikaFiber 012 is supplied in 600 g sealed bags, 20 bags per carton, totaling 12 kg, for cementitious systems. |
| Container Loading (20′ FCL) | 20′ FCL container loading: palletized bags of SikaFiber 012 monofilament polypropylene fibers, securely stowed in a dry container for cementitious systems. |
| Shipping | SikaFiber 012 is typically shipped as a non-hazardous, non-DG material in moisture-resistant bags or sacks, palletized and stretch-wrapped. It requires dry, clean transport and protection from punctures and moisture. Normal handling applies; no special ventilation, segregation, or emergency response is normally required. Consult the SDS and local regulations. |
| Storage | Store SikaFiber 012 in original, unopened packaging in a cool, dry, well-ventilated area. Protect from direct sunlight, moisture, excessive heat, and contamination. Keep away from ignition sources. Place pallets on a clean, dry surface; do not stack excessively. Keep bags closed to prevent dust and foreign matter. Use oldest stock first and observe the manufacturer’s stated shelf life. |
| Shelf Life | Shelf life is approximately 24 months from production date when stored dry, in unopened original packaging, away from direct sunlight. |
In cast-in-place slab-on-grade production for distribution centers and cold storage floors, SikaFiber 012 is batched at 0.9 kg/m³ to satisfy early-age plastic shrinkage crack control specified under EN 14889-2:2006 for Class I polymer fibres. The dosing sequence in a twin-shaft compulsory mixer places the monofilament polypropylene after coarse aggregate charging and before the final 10 % of batch water, allowing fiber distribution across the aggregate surface and limiting floatation in the wet paste phase. Plant experience with 2.0 m³ laboratory pan mixers and 9.0 m³ production twin-shaft mixers indicates that bagged fibers thrown manually onto the conveyor are associated with higher fiber-cake formation in truck mixers than those fed by a 0.5–2.0 kg/sec vibratory feeder; when fiber addition exceeds 1.2 kg/m³ in mixes with fly ash replacement above 30 %, the surface finish after ride-on power trowelling becomes sensitive to blade angle and fiber trowel drag. Compliance for exposed industrial floors often references ASTM C1116/C1116M Type III synthetic fiber-reinforced concrete and ASTM C94/C94M ready-mixed concrete requirements when the floor contract specifies slab flatness measured under ASTM E1155. Acceptable terminal slab types include ground-bearing warehouse floor slabs, external apron slabs, maintenance yards, and dolly-tracked cold room pavements; SikaFiber 012 is not a structural reinforcement substitute for welded wire mesh and does not eliminate joint-induced cracks in restrained slabs.
Precast cladding and non-structural element production with SikaFiber 012 at 0.6–0.9 kg/m³ shortens the vulnerable period between concrete placement and demolding by reducing localized plastic cracking in thin web sections and edge returns. The addition rate is usually set by volume rather than mass to account for fiber density; at 0.09 % by volume the fiber count per cubic metre is sufficient for plastic shrinkage control but below the threshold for structural crack-width reduction under EN 14889-2:2006. In precast plants using circulator pallet systems and heated moulds at 40–55 °C, the fiber is added after the fine aggregate and before the water reducer in a compulsory counter-current mixer with wet mixing time not exceeding 120 seconds; if the fiber is added to a dry blend in a skip hoist, clumping occurs when ambient relative humidity exceeds 70 % because the fiber picks up moisture and resists dispersion. Compliance for CE-marked precast concrete is governed by EN 13369 and, for fibre products, by harmonized standard EN 14889-2:2006; plants must retain initial type test reports and run factory production control under the AVCP level 1+ or 3 depending on intended use. Terminal precast components include architectural wall panels, non-load-bearing spandrel elements, cable ducts, manhole riser sections, and utility trench lids.
Where wet-mix shotcrete is supplied to primary tunnel lining and slope stabilization, SikaFiber 012 is introduced in the concrete plant at 1.0–1.5 kg/m³, with the upper limit set by pump-line pressure rather than the fiber-dispensing system. Under EN 14487-1 sprayed concrete and EFNARC specification guidelines, the base mix is designed with 8–10 mm maximum aggregate and a slump of 160–200 mm using a high-range water reducer before the liquid accelerator is dosed at the nozzle; the fiber is not added through the nozzle water ring because the monofilament would be ejected into the rebound stream and fail to disperse through the paste. Rotor pocket pumps or double-piston pumps with nominal output of 10–25 m³/h and delivery pressures not exceeding 70 bar are used; when the line includes 30–50 m of steel hose and 90° elbows, batchers reduce fiber addition to 1.0 kg/m³ to avoid pressure spikes and blockage. The fiber contributes to plastic shrinkage crack reduction in the sprayed layer, but structural flexural toughness is assessed separately by EN 14651 or ASTM C1609/C1609M using steel or macro-synthetic fibers. Terminal applications include slope sealing, tunnel primary lining shells, rockfall retention facing, and canal relining.
Flowable cementitious underlayments for renovation projects use SikaFiber 012 at 0.5–0.9 kg per m³ of mixed mortar when the specification requires plastic shrinkage crack resistance without impairing the spread flow of 230–250 mm measured by EN 12706. The fiber is blended in dry form during silo or bagged mortar production using a horizontal paddle mixer at filling levels above 60 % to prevent fiber fallout during pneumatic transport to the continuous mixer; field experience with 100 L/min continuous mixers and 20–40 m progressive cavity pump runs shows that fiber content above 1.0 kg/m³ can increase yield stress and reduce the final leveling ability of the pump applied layer. Quantified rheological boundaries for this specific product in polyacrylate-modified self-leveling formulations are limited; published standard curves do not define fiber-cement yield stress coupling for every flow modifier combination. Conformity for the finished screed material falls under EN 13813 for cement screeds, and for American specification jobs, ASTM C1708/C1708M for self-leveling mortars; the CE mark under EN 13813 must state compressive strength class, flexural strength class, and release of regulated substances. Terminal floor constructions include fiber-reinforced leveling layers under vinyl or linoleum, renovation screeds on heating systems, and load-bearing floor patch underlays.
Produced in dry-mix plants, repair mortars and renders receive SikaFiber 012 during the raw material dosing stage at 0.1–0.15 % by mixed dry mortar mass, a range that limits fiber visibility on trowelled surfaces while still reducing plastic settlement cracks in thick repair sections. The fiber is metered through a weigh belt feeder before fine aggregate and cement are dropped into the twin-shaft mixer; when it is premixed with silica sand and dusting silos route the blend through screw conveyors, electrostatic charge can cause fiber accumulation on conveyor inspection hatches. The finished products fall under EN 1504-3 as non-structural or structural repair mortar depending on compressive strength class, and under ASTM C928/C928M for packaged dry mortar repair; REACH documentation covers the polymer chemistry in the SDS. Typical terminal outputs are hand-applied and spray-applied repair patches, façade skim coats, and spalled corner rebuilds on concrete structures.
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Current product literature identifies SikaFiber 012 as a discrete monofilament polypropylene fiber supplied for concrete, mortar, and other cementitious systems. Manufacturer-published physical data list a nominal fiber length of 12 mm, a specific gravity of 0.91 g/cm³, and a tensile strength range of approximately 550–620 MPa when tested in accordance with ASTM D2256; elongation at break is published in the region of 15 %, with a tensile modulus of approximately 3.5 GPa. The product is classified as a Type III synthetic fiber-reinforced concrete addition under ASTM C1116/C1116M, designated for plastic-shrinkage crack control rather than hardened-state structural load transfer. Standard addition rates for ready-mixed concrete are 0.9 kg/m³ (1.5 lb/yd³) for general slab-on-grade exposure and up to 1.8 kg/m³ (3.0 lb/yd³) where higher evaporation rates or finishing sequences require additional crack-width control. SikaFiber 012 differs from steel fiber systems in that it is non-corrosive, does not increase flexural residual strength under EN 14651, and is not an alternative to deformed reinforcing bars. When compared with macro-synthetic polymer fibers, the 12 mm monofilament geometry is intended for low-dose distribution across large surface areas rather than for toughness or post-crack capacity.
The values in the following matrix are manufacturer-published typical data for SikaFiber 012, not batch certificate limits. Where the supplier’s product data sheet and the independent batch certificate differ, the batch certificate governs for acceptance decisions under ASTM C1116/C1116M.
| Parameter | Reported value or classification | Test basis or reference standard |
|---|---|---|
| Base polymer | Virgin polypropylene homopolymer | Supplier literature |
| Fiber geometry | Monofilament, discrete, round cross-section | Supplier literature |
| Nominal length | 12 mm (0.5 in) | Supplier literature |
| Specific gravity | 0.91 g/cm³ | ASTM D792 |
| Tensile strength | 550–620 MPa | ASTM D2256 |
| Tensile modulus | 3.5 GPa | ASTM D2256 |
| Elongation at break | 15 % | ASTM D2256 |
| Water absorption | 0 % | ASTM D570 |
| Melting point | 160–165 °C | ASTM D3418 |
| Common dosage range | 0.9–1.8 kg/m³ | Manufacturer-published |
| Product classification | Type III synthetic microfiber | ASTM C1116/C1116M |
Where the product is supplied to European projects, the applicable harmonized specification for polymeric fibers in concrete is EN 14889-2:2006; compliance with that standard is evaluated separately from ASTM C1116/C1116M and should be confirmed for CE-marked deliveries.
Plastic shrinkage cracks form when capillary tension in the fresh paste exceeds the low strain capacity of the hydrating surface, typically within 0–8 h after placement. The fiber operates in this window, not after the matrix has hardened. Under ASTM C1579 panel testing, the inclusion of 0.9 kg/m³ of monofilament polypropylene fiber is associated with measurable reductions in crack area relative to unreinforced controls; published values vary with cement fineness, aggregate volume, surface evaporation rate, and consolidation. The 12 mm length is sufficient to intersect early microcracks while remaining short enough to avoid the finishing interference commonly reported with 30–60 mm macro-fibers. Because the fiber modulus is approximately 3.5 GPa and hardened normal-strength concrete is typically in the 25–40 GPa range, the fiber does not function as a hardened-phase stress-transfer mechanism. Its crack-control role is therefore limited to the plastic state, and it is not a substitute for reinforcement at restrained-shrinkage joints, doweled contraction joints, or tensile zones.
The American Concrete Institute hot-weather guidance in ACI 305R identifies a surface evaporation rate of 0.5 kg/m²/h as a threshold above which supplementary protection is required. SikaFiber 012 does not replace evaporation retarders, windbreaks, fogging, or wet curing above that threshold. In slab placements where finishing operations are delayed and bleeding rates are elevated, the fiber may be less available at the surface if it settles below the plane of cracking; published field data for this specific configuration is limited.
At production scale, fiber addition sequence is a more significant variable in dispersion quality than total mixing time. The fiber is introduced after aggregates and cement but before the full addition of mixing water, or directly into the truck drum at the plant before high-speed mixing. Manufacturer-published mixing guidance calls for a minimum 4–5 min of high-speed drum rotation at typical ready-mix drum speeds of 15–18 rpm after fiber introduction. Discharge is not started until visual inspection shows no fiber clumps on the drum blades or in the hopper. In pan-mixed precast concrete, fiber distribution is more uniform when the fibers are added after the initial cement paste has formed and before final slump adjustment. In shotcrete processes, the 12 mm fibers are introduced at the batching stage or through the hopper; standard nozzle geometry does not require modification, although line blockages have been reported at dosages above 2.7 kg/m³. Extended mixing beyond 45–60 min is not recommended because aggregate abrasion may reduce effective fiber length; direct batch-to-batch data for SikaFiber 012 under extended mixing is limited.
When SikaFiber 012 is compared with macro-synthetic and steel fiber systems, the functional boundary is set by post-crack behavior. Steel and macro-synthetic fibers are evaluated under ASTM C1609/C1609M or EN 14651 for flexural toughness and residual strength; SikaFiber 012 is not designed for those applications and is typically not included in such structural calculations. The following matrix summarizes the categorical differences.
| Property or function | SikaFiber 012 monofilament microfiber | Macro-synthetic polymer fiber | Deformed steel fiber |
|---|---|---|---|
| Nominal length | 12 mm | 30–60 mm | 30–60 mm |
| Specific gravity | 0.91 g/cm³ | 0.90–0.92 g/cm³ | 7.85 g/cm³ |
| Tensile modulus | 3.5 GPa | 3–10 GPa | 200 GPa |
| Corrosion in chloride exposure | Not susceptible | Not susceptible | Susceptible unless stainless or galvanized |
| Primary function | Plastic shrinkage crack reduction | Post-crack toughness and impact resistance | Post-crack flexural capacity |
| Structural reinforcement substitute | Not accepted | Limited to specific design cases | Replaces bar or wire in certain slab designs |
| Relevant test method | ASTM C1579 | EN 14651 or ASTM C1609 | EN 14651 or ASTM C1609 |
The corrosion resistance and low specific gravity of polypropylene are the main reasons for selection in slabs exposed to moisture, de-icing salts, or marine air. However, the lower modulus means that crack-width control after hardening is limited. In design documentation, substitution of SikaFiber 012 for welded wire reinforcement is limited to plastic-shrinkage crack control only; the wire or bar specified for structural capacity is retained. Published comparative data for SikaFiber 012 and specific macro-synthetic products under identical slab-on-grade load tests is limited.
Operational boundaries include upper dosage, finishing, and compatibility constraints. Addition below 0.45 kg/m³ is not recommended because crack-control effect becomes statistically indistinguishable from unreinforced control panels in some ASTM C1579 evaluations. Addition above 2.7 kg/m³ increases the probability of fiber balling, surface fuzzing, and slump reduction that cannot be corrected without trial mix adjustments. The product is not a drying-shrinkage reducer; it does not lower the drying shrinkage coefficient of the hardened matrix under ASTM C157 length-change testing. Claims that polypropylene microfibers replace structural reinforcement or expand joint spacing are not supported by current design standards. In cementitious systems containing high doses of amine-based accelerators or water glass, the fiber itself is chemically resistant, but the admixture may alter bleeding and surface finish; a trial batch is required.
Storage of SikaFiber 012 should be in dry conditions at temperatures between −20 °C and +70 °C. Packaging that is damaged or wetted before batching may compromise the pre-weighed dose accuracy. The product does not require a water-cement ratio correction because it does not absorb mix water. In dry-cast pipe and block production, published data for SikaFiber 012 is limited, and fiber dispersion should be verified by washout testing or cross-section inspection during plant trials.
