| HS Code | 128545 |
| Productname | MasterFiber MAC Matrix - High Performance Wave-crimped Macro Fiber |
| Fibertype | Wave-crimped macro synthetic fiber |
| Materialcomposition | Polypropylene/polyethylene blend |
| Color | Natural |
| Form | Discrete wave-crimped fibers |
| Fiberlength | 54 mm |
| Equivalentdiameter | 0.65 mm |
| Aspectratio | 83 |
| Specificgravity | 0.91 |
| Tensilestrength | 580 MPa |
| Elasticmodulus | 6.0 GPa |
| Meltingpoint | 160 °C |
| Alkaliresistance | Excellent |
| Waterabsorption | Nil |
| Recommendeddosage | 3.0-7.0 kg/m3 |
| Compliance | ASTM C1116 Type III; EN 14889-2 |
As an accredited MasterFiber MAC Matrix - High Performance Wave-crimped Macro Fiber factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | MasterFiber MAC Matrix comes in 1.5 lb water-soluble bags, packaged 40 bags per carton and 60 cartons per pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): MasterFiber MAC Matrix High Performance Wave-crimped Macro Fiber loaded palletized, dry, securely braced within weight limits. |
| Shipping | Shipped as a non-hazardous construction material in sealed, moisture-resistant bags or boxes, palletized and stretch-wrapped. Transport by standard truck or rail freight; avoid punctures, moisture, and extreme temperatures. Follow SDS and local regulations. Store indoors, off ground, in dry conditions. No special handling required under normal conditions. |
| Storage | Store MasterFiber MAC Matrix in its original, unopened packaging in a cool, dry, well-ventilated area. Keep away from direct sunlight, moisture, excessive heat, flames, and ignition sources. Place pallets on a level surface off the ground, do not stack unsafely, and protect bags from tearing or contamination. Use first-in, first-out. Follow manufacturer’s SDS/TDS and local regulations. |
| Shelf Life | Shelf life is 24 months from date of manufacture when stored dry in original unopened packaging at moderate temperatures. |
At a standard **180 mm**-thick ground-bearing slab poured for high-bay racking logistics buildings, MasterFiber MAC Matrix is dosed at **3.0 kg/m³** to replace A142 steel fabric in crack-control design where post-crack flexural performance is measured under **ASTM C1609/C1609M-19a** and average residual strength is recorded under **ASTM C1399/C1399M-10**. The fiber conforms to **EN 14889-2:2006** Class II and **ASTM C1116/C1116M-23** Type III synthetic fiber. In the batching sequence, the fiber is charged into a **9 m³** truck mixer after the coarse aggregate and before the cementitious binder, and a minimum post-addition mixing interval of **5 minutes** at **14 rpm** is maintained. Plant-level batching records show that shortening this interval below **4 minutes** produces visible fiber clusters at the discharge chute and can require re-tempering, while extending mixing beyond **8 minutes** in mixes already containing air-entraining admixture can raise air content by **1.0 to 1.5 percentage points**. The concrete is specified with a target slump of **130 ± 20 mm**, an air content of **4.5 ± 1.0 %** by **ASTM C231/C231M-17a**, and is placed using a highway-span laser screed with 3D grade control. Joint saw-cutting follows at **6 h to 10 h** after finishing using a dry-cut walk-behind saw; panel dimensions are commonly set at **6.0 m × 6.0 m** for racking loads up to **25 kN**. The resulting terminal product is a jointed macro-fiber-reinforced industrial floor slab for ambient-temperature logistics warehouses and automated high-bay storage facilities.
Wet-cast precast culvert sections and linear drainage channels, where conventional steel mesh placement constitutes the largest share of labour input, are produced with MasterFiber MAC Matrix at **3.5 kg/m³** to **4.5 kg/m³** in a stationary **1.0 m³** twin-shaft mixer. The concrete is batched to a water-cement ratio of **0.38** with **8 mm** down crushed granite coarse aggregate. Fiber addition occurs after an initial **30-second** dry mixing of aggregates and cement to avoid balling at the blade tips; the subsequent wet mixing phase is extended to **90 s**, after which the mixture is discharged through an overhead hopper into single-cell steel forms. Compaction is performed on a variable-frequency external vibration table operating at **50 Hz** for **15 s to 25 s** per lift, with form-filling limited to **400 mm** lift depth to allow entrapped air to escape. Accelerated curing uses a steam cycle of **2 h** pre-heating, **5 h** at **60 °C**, and **1 h** cooling, after which the elements are stripped at a demoulding compressive strength of **15 MPa**. The terminal precast products are box culverts, catch basins, and U-drain channels designed under **ASTM C1577-20** or **EN 13369:2023** for buried infrastructure. Compliance is verified through **ASTM C1116/C1116M-23** and **EN 14889-2:2006**. Because published data for this specific configuration is limited for cyclic load tests, static post-crack performance is used for design verification.
In dry-mix shotcrete for primary tunnel support in hard rock headings, MasterFiber MAC Matrix is pre-blended with the **0/8 mm** sand-cement dry batch at **4.0 kg/m³** and delivered in **1,000 kg** bulk bags to the hopper of a rotary gun machine. The nozzle operator applies the material at an air pressure of **6 bar to 8 bar**, with water introduced at the nozzle to reach a surface slump of **10 mm to 30 mm**; rebound losses are monitored with a rebound box and typically run between **12 % and 20 %** depending on air-gap distance and nozzle angle. A production bottleneck specific to this application is dry-batch segregation during pneumatic transport: if the fiber is not pre-blended using a paddle mixer for **3 minutes** before hopper filling, vertical stratification in the hopper can produce intermittent fiber-depleted layers in the sprayed lining. The applied layer thickness is kept at **50 mm to 75 mm** per pass to limit sloughing, and alkali-free accelerator is metered at **5 % to 7 % by mass of cement** with a positive-displacement dosing pump. Early-age compressive strength is checked with a Meyco penetration needle at **6 h**, and bond strength is verified by **EN 1542:1999** pull-off tests on sawn cores. The terminal product is a fully bonded shotcrete rock-support shell for underground headings, ramps, and cross passages, with flexural toughness classified under **ASTM C1550-20** and **EN 14488-3:2006** using the round panel test.
Container terminal hardstands subjected to reach-stacker wheel loads up to **90 kN** require a ready-mix proportioning strategy that keeps the fiber dispersed under long delivery times. MasterFiber MAC Matrix is batched at **3.2 kg/m³** into a high-energy discharge sequence: **20 mm** maximum coarse aggregate, fiber, fine aggregate, then cement and water. The truck-mounted drum is charged at the plant and completes **45 revolutions** after water addition; if the concrete arrives at site with slump lower than **100 mm**, plant-level records suggest that adding water on site to reach **120 ± 20 mm** lowers the post-crack residual strength because the local water-cement ratio around the fiber interface increases. A low-risk approach for this segment is to specify a target air content of **5.0 ± 1.0 %** under **ASTM C231/C231M-17a** and to use a polycarboxylate-based high-range water reducer at **0.6 wt % to 0.9 wt % of cement**. Paving is carried out with a slipform paver or a heavy-duty vibrating screed, and surface finishing is completed with a ride-on power trowel followed by spray-applied curing compound conforming to **ASTM C309-19**. The terminal product is a jointed plain concrete hardstand for laden container stacking and rubber-tired gantry crane parking areas, designed under port operator wheel-load criteria and evaluated by **ASTM C1609/C1609M-19a** flexural toughness. Fiber conformity is documented under **ASTM C1116/C1116M-23**.
For precast segmental tunnel linings produced in fixed carousel moulds, MasterFiber MAC Matrix is introduced at **3.0 kg/m³** in a two-stage mixing sequence: a **45-second** dry mixing of aggregates and fiber, followed by cement slurry injection and **120 s** of wet mixing. The production process imposes a narrow workability window because the segments are conventionally cast with a slump of **80 mm to 100 mm** to permit rapid demoulding without cracking at panel edges. External vibration is applied through pneumatic demoulding vibrators operating at **120 Hz** for **20 s** per mould position; operation below **15 s** yields surface voids above the specified acceptance limit, while operation beyond **30 s** causes fiber migration towards the upper surface in the cover zone. Steam curing follows an enclosed tunnel cycle: **1.5 h** pre-heating to **55 °C**, **6 h** at **60 °C**, then **1 h** cooling before demoulding at **16 MPa** compressive strength. The terminal products are precast reinforced concrete segments for TBM tunnel linings, produced under **EN 13369:2023** and **EN 14889-2:2006**; flexural toughness is characterized by **ASTM C1550-20** on square panels cut from trial rings. Quality control also requires a moisture content check on the fiber supply batch because condensation inside bulk bags during storage can alter the fiber feeding rate and create batch-to-batch dosage variance of approximately **0.3 kg/m³**.
Wastewater treatment basin slabs and secondary containment bunds exposed to sulfate-bearing contact water are proportioned with a water-cement ratio of **0.40** and a supplementary cementitious system containing **25 %** slag cement by mass. MasterFiber MAC Matrix is added at **2.4 kg/m³** in the transit mixer, not as primary reinforcement but as early-age shrinkage crack control intended to reduce the number of through-slab penetrations into the waterstop joint zone. The batching order deliberately places the fiber after the coarse aggregate but before the slag-cement blend; this prevents the fiber from wrapping around the ribs of the mixing drum and improves dispersion during the **90-second** high-speed mixing phase. Slump at discharge is maintained between **100 mm and 130 mm** to allow pumping through a truck-mounted boom pump with a **125 mm** delivery line. Placement proceeds in **6.0 m × 6.0 m** pour strips with PVC waterstopped construction joints, and curing uses wet burlap and polyethylene sheeting for **7 days** in accordance with **ACI 350-20** requirements for environmental structures. The terminal products are wastewater treatment plant aeration basin slabs, clarifier walkway slabs, and chemical bund containment aprons. Compliance is documented under **ASTM C1609/C1609M-19a** for post-crack performance, **ASTM C1116/C1116M-23** for fiber classification, and **EN 14889-2:2006** for fiber conformity; because published data for this specific configuration is limited in long-term wastewater exposure, cyclic exposure testing is recommended before full-scale specification.
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MasterFiber MAC Matrix is a high-performance wave-crimped macro-synthetic fibre introduced for concrete reinforcement applications where crack control and post-crack residual capacity are specified. The product is manufactured as a polyolefin monofilament with a continuously crimped geometry intended to produce mechanical anchorage in the hardened cement paste. Published typical geometry includes a fibre length of 54 mm, an equivalent diameter of 0.50 mm, and a calculated aspect ratio near 108. The fibre exhibits a specific gravity of 0.91, a published tensile strength of approximately 620 MPa, an elastic modulus of approximately 9.5 GPa, and a melting point of approximately 160 °C. Dosage rates for structural crack-control applications generally fall between 1.8 kg/m³ and 4.0 kg/m³, although project-specific confirmation under EN 14651, ASTM C1609/C1609M, or ASTM C1550 is required to establish the residual flexural capacity for a given concrete mix.
Manufacturer-published typical physical properties and corresponding test references are presented in Table 1. The values are indicative lot-average data for material qualification only; production qualification should use lot-specific documentation and project beam testing.
| Property | Published typical value | Test method / reference |
|---|---|---|
| Composition | Polyolefin monofilament | Manufacturer documentation |
| Specific gravity | 0.91 | ASTM D792 |
| Fibre length | 54 mm | Manufacturer lot inspection |
| Equivalent diameter | 0.50 mm | Optical microscopy |
| Aspect ratio | 108 | Calculated |
| Tensile strength | 620 MPa | ASTM D3822/D3822M |
| Elastic modulus | 9.5 GPa | ASTM D3822/D3822M |
| Melting point | 160 °C | Differential scanning calorimetry |
| Water absorption | <0.1% | ASTM D570 |
The wave-crimp geometry is structurally relevant because smooth polyolefin monofilaments rely primarily on interfacial friction and adhesion, which can produce abrupt fibre slip after first cracking. Crimp introduces mechanical interlock along the embedded fibre length, increasing peak pull-out force and converting a larger proportion of tensile stress into residual flexural capacity. Under ASTM C1609/C1609M-19a, beam specimens containing MasterFiber MAC Matrix at dosages near 3.0 kg/m³ typically exhibit non-zero residual flexural strengths at net deflections of L/600 and L/150; however, reported values vary with concrete compressive strength, aggregate angularity, mix viscosity, and fibre orientation caused by placement and consolidation. Published independent data for this specific product are more consistent for slab-on-ground applications than for high-temperature or chemically aggressive service environments. Designers should not extrapolate a single residual strength value across mix designs without beam test verification at the specified workability and aggregate grading.
Compared with hooked-end steel fibre at an elastic modulus near 200 GPa, MasterFiber MAC Matrix has a published elastic modulus near 9.5 GPa. This lower stiffness means that the synthetic macro-fibre contribution to serviceability limit state is governed by post-crack ductility rather than elastic stress transfer in the uncracked state. In a cracked section at small crack widths below 0.2 mm, steel fibre may mobilise higher stress at lower slip; wave-crimped polyolefin fibre requires additional crack opening to reach its peak pull-out resistance. Consequently, comparative beam tests under ASTM C1609/C1609M-19a often report lower early-deflection residual strengths for macro-synthetic fibres at equal fibre volume, but more stable post-crack softening at larger deflections when dosage is sufficient. The dosage required to achieve a specified residual strength is therefore matrix-specific and cannot be selected by simple fibre mass substitution from a steel-fibre specification.
Early-age plastic shrinkage crack control is evaluated under ASTM C1579-21 or equivalent laboratory restraint testing. In restrained plastic shrinkage tests, macro-synthetic fibre additions above 1.8 kg/m³ have been shown to reduce cumulative crack width relative to plain control slabs, although the result is sensitive to evaporation rate, surface finishing, and fibre distribution. Published data for this specific product under ASTM C1579-21 should be verified with the manufacturer’s technical report because small-batch testing may not represent full-depth fibre orientation in slab placements.
For ground-supported slabs on grade, the product is commonly used as a replacement for welded wire mesh where the design basis is plastic shrinkage crack control and joint spacing is selected according to ACI 360 guidance or Concrete Society TR34. In construction practice, slabs placed with macro-synthetic fibre at 2.0 kg/m³ to 4.0 kg/m³ are exposed to the same finishing operations as plain concrete; however, floating and trowelling should be delayed until the surface paste closes over the fibres. Pan-type floats and walk-behind power trowels are preferred, and ride-on trowelling equipment with high blade load may expose fibres at the surface if the slab is worked too early. Surface fibre visibility is managed by using well-graded fine aggregate and by rejecting batches with slump below the specified lower bound, because low workability increases fibre protrusion.
Production-scale batching of macro-synthetic fibres requires attention to addition sequence and mixer energy. In truck mixers, the fibre is added after the concrete has been wetted out, and mixing at moderate to high drum speed is maintained for a minimum of approximately 5 minutes at full load to disperse the fibres. Addition rates above 3.0 kg/m³ may reduce slump by a measurable amount; the reduction is commonly managed by increasing the high-range water-reducing admixture dose rather than by adding water, because increases in free water alter the water-cement ratio and reduce compressive strength. Fibre balling occurs when the fibre is added too quickly to dry aggregates or when mixing energy is below the manufacturer’s recommended threshold. In pan mixers and twin-shaft mixers used for precast production, typical wet mixing durations after fibre addition of 4–6 minutes have been observed to produce acceptable distribution; the exact time depends on batch size, mixer wear, and fibre dose. The product does not require pre-drying at normal storage conditions, but wet fibre packages should not be introduced into cementitious mixes because clumped fibres may not separate under low-shear mixing.
MasterFiber MAC Matrix is used in wet-mix shotcrete where steel-fibre rebound can create safety and tooling problems and where corrosion staining is unacceptable. In dry-mix shotcrete, the fibre may be added at the mixer or through dosing equipment, provided the fibre feeding system is calibrated for the volumetric delivery of synthetic macro fibres. For precast tunnel segments and manhole linings, the product is batched into the concrete at the plant, and the hardened composite is assessed by ASTM C1550 round panel testing or EN 14651 beam testing. Published data for this specific configuration is limited for fire-resistant linings under hydrocarbon curve exposure; project-specific fire testing is required before substituting this fibre for steel or polypropylene micro-fibre systems in fire-sensitive designs. The product is not classified as primary reinforcement under EN 1992-1-1 or ACI 318-19 unless the structural design explicitly accounts for the fibre contribution and the relevant design code permits macro-synthetic fibre use.
Pumping through high-rise or long-distance lines introduces another variable. Fibre orientation in a pumped concrete element is influenced by the reduction in line diameter, the number of bends, and the flow rate at the discharge point. Macro-synthetic fibres tend to align with the direction of flow, which can produce anisotropic residual flexural properties in beams cut perpendicular to flow compared with beams cut parallel to flow. For production qualification, specimens should be prepared from the same placement equipment and, where possible, sawn from test panels cast with the same flow direction as the slab. No separate batching for laboratory specimens should be performed without recording mixer type, mixing time, and transport time, because these variables influence fibre distribution and residual strength results.
The polyolefin chemistry is inert in alkaline concrete pore solution, and the fibre does not corrode in chloride-exposed or marine environments. This is a practical difference from steel fibre in parking decks, tunnel invert slabs, and coastal structures, where steel fibres require concrete cover, crack-width control, and adequate pH buffering to prevent corrosion staining. The lower specific gravity of 0.91 also reduces freight and handling demand relative to steel fibre at the same fibre count; however, the package volume per unit weight is higher, and silo storage density for automated dosing is substantially lower than for steel fibre. Batching systems with gravimetric weigh hoppers may need larger volume hoppers or more frequent refill cycles when switching from steel to macro-synthetic fibre at high production rates.
Batch-to-batch variation in fibre crimp frequency and amplitude can occur because the wave-crimp is a manufactured geometric parameter, not an inherent material property. For production quality control, the purchaser should request manufacturer lot inspection data for fibre length, diameter, and crimp frequency, and should compare residual flexural test results when a new lot is introduced into a continuous pour. If the concrete mix includes high-range water reducers with high solids content, the adsorbed polymer on the fibre surface may change the effective surface friction and shift residual strength by a small but measurable amount; this interaction should be reviewed with the admixture supplier during mix approval.
The product is specified under EN 14889-2:2006 as a polymer fibre for concrete. Documentation for CE marking under Regulation (EU) No 305/2011 should include a Declaration of Performance and a factory production control certificate covering the declared fibre length, diameter, tensile strength, and alkali resistance. In North American specifications, MasterFiber MAC Matrix can be referenced as a Type III synthetic fibre-reinforced concrete under ASTM C1116/C1116M. Flexural performance verification is typically performed using ASTM C1609/C1609M-19a for beam specimens, ASTM C1399/C1399M for average residual strength of fibre-reinforced concrete, or ASTM C1550 for round panel energy absorption in shotcrete. Compliance with REACH and RoHS is documented through the manufacturer’s safety data sheet and regulatory declarations; specific bill-of-materials information should be obtained from the supplier for imported projects or where national registration thresholds apply.
Table 2 provides a comparative basis between MasterFiber MAC Matrix, glued steel fibres, and polypropylene micro-fibres. The comparison is based on typical published material properties, not on identical residual strength performance, because fibre dosage, geometry, and concrete matrix interact to determine the structural outcome.
| Attribute | MasterFiber MAC Matrix | Glued steel fibre | Polypropylene micro-fibre |
|---|---|---|---|
| Specific gravity | 0.91 | 7.85 | 0.91 |
| Geometry | Wave-crimped monofilament | Hooked-end or straight steel wire | Fibrillated or monofilament micro-fibre |
| Typical length | 54 mm | 30–60 mm | 6–19 mm |
| Typical dosage | 1.8–4.0 kg/m³ | 20–40 kg/m³ | 0.6–1.2 kg/m³ |
| Primary function | Post-crack residual strength and crack control | Post-crack structural reinforcement | Plastic shrinkage crack control |
| Corrosion in cracked concrete | None | Possible without passivation or coatings | None |
| Magnetic signature | None | Present | None |
| Standards | EN 14889-2:2006, ASTM C1116/C1116M Type III | EN 14889-1, ASTM A820/A820M | EN 14889-2:2006, ASTM C1116/C1116M Type III |
Packaging and storage are operationally significant because macro-synthetic fibres are lightweight and can create worker exposure to airborne fibre if handled without dust suppression. Packages should be stored in dry conditions and protected from puncturing, moisture, and contact with solvents or strong oxidizers. The product is non-corrosive and does not require the same lifting equipment as steel fibre pallets; however, batching personnel should use vacuum-assisted cutting or low-dust packaging when specified by site occupational hygiene programs. The fibre is added to the concrete batch as supplied and should not be opened into the mixer in a way that allows direct contact with rotating blades during dry mixing. For automated admission systems, fibre feeders should be interlocked with the concrete batch controller to prevent double dosage or skipped addition. Site quality-control records should include coupon or beam specimens for each mix design and fibre lot, because lot-specific fibre geometry can shift residual strength results at a given concrete slump. MasterFiber MAC Matrix is not classified as hazardous in transport under typical global regulations; confirm the current safety data sheet for regional occupational exposure limits and disposal requirements.
