STRUX® 75/32 Fiber is a synthetic macro fiber complying with ASTM C1116/C1116M Type III, which can be used in ready-mixed concrete for different applications such slab-on-ground flooring, thin-walled precast overlays and pavements.
STRUX® 75/32 fibers are extruded from a virgin polypropylene and polyethylene polymer blend. The geometry, strength and high modulus is specifically engineered to provide high post-crack control performance with excellent dispersion into the concrete matrix, reducing plastic and hardened concrete shrinkage cracking, increasing fatigue resistance and concrete toughness. STRUX® 75/32 fiber is a user-friendly fiber reinforcement, which is easier and safer to use, compared to other types of reinforcement.
- Easy to mix and fast to disperse.
- Barely visible on the surface obtaining highly aesthetical concrete.
- Uniformly built into the concrete, eliminating a concern over proper positioning of reinforcement.
- Due to unique fiber design both plastic as well as drying shrinkage cracking is reduced, which improves the ductility and durability of the concrete.
- Can be used to completely or partially replace light rebar, welded wire mesh and steel fibers.
- Corrosion Resistant (non-ferric)
- Saves time by getting rid of a phase in the construction process (amount of fitting and levelling of reinforcements is eliminated or reduced)
- Reduction of storage, transportation and delivery costs for reinforcing welded wire mesh
- Ease of pumping, passes easily through pump grates
Slab on ground:
STRUX® 75/32 Synthetic Macro Fiber is specially designed for ease of use, rapid dispersion in concrete, excellent finishability and improved pumpability in slab-on-ground flooring, in commercial, industrial, and residential floors, as well as other flat work and formwork applications.
Traditional light steel reinforced elements:
STRUX® 75/32 Synthetic Macro Fibers can be used as a suitable alternative to WWF or light reinforcing steel specified for temperature and shrinkage reinforcement.
STRUX® 75/32 Synthetic Macro Fibers can be used as a replacement for secondary reinforcements of lightweight pre-fabrication (e.g. staircases, cellars, manholes, pits, Septic tanks, etc.)
White toppings and overlays
STRUX® 75/32 Synthetic Macro Fiber is ideal for white toppings and overlays jobs. Due to its rapid dispersion into the mix, the overall project productivity and contractor’s profitability is enhanced.
STRUX® 75/32 Synthetic Macro Fiber addition rates are dependent on the specific application and desired properties and will typically vary between 3 to 7.5 lbs./yd³ (1.8 to 4.5 kg/m3).
The utilization of STRUX® 75/32 Synthetic Macro Fiber may require the use of a mid-range water reducer or a superplasticizer such as MIRA® water reducers or ADVA® superplasticizers to restore the required workability. In addition, slight increases in fine aggregate contents may be needed.
STRUX® 75/32 Synthetic Macro Fibers may be added to concrete at any point during the batching or mixing process. After fiber addition, the concrete must be mixed at the minimum of 70 revolutions to ensure adequate dispersion.
Please contact your GCP Applied Technologies representative with any questions.
Compatibility with Other Admixtures and Batch Sequencing
STRUX® 75/32 Synthetic Macro Fibers is compatible with all GCP admixtures. Their action in concrete is mechanical and will not affect the hydration process of the cement or compressive strength. Each liquid admixture should be added separately to the concrete mix.
|STRUX® 75/32 Synthetic Macro Fiber Properties|
|Length||1.25 in. (32 mm)|
|Modulus of elasticity||1,378 ksi (9.5 GPa)|
|Tensile strength||90 ksi (620 MPa)|
|Melting point||320°F (160°C)|
|Ignition point||1,094°F (590°C)|
|Alkali, acid & salt resistance||High|
Packaging & Storage
STRUX® 75/32 fiber is available in 1 lb. or 5 lb. (0.45 kg or 2.3 kg) bags
STRUX® 75/32 fiber reinforced concrete floors can be finished with most finishing techniques.
STRUX® 75/32 fiber does not affect the finishing properties of concrete. Due to its characteristics, STRUX® 75/32 fiber is suitable to be used in power/hand troweled concrete, colored and broom finished concrete.
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Last Updated: 2020-01-24