Self-compacting concrete that flows where vibration can't reach.
Self-compacting concrete (SCC) for congested reinforcement, complex geometries, and architectural surfaces. No vibration. No segregation. Engineered for flow.
Inside Alpha Flow
Alpha Flow is self-compacting concrete (SCC) — concrete that places itself. Pour it into the formwork and it flows under its own weight, fills every void around dense reinforcement, and self-levels with a perfect surface finish. No vibration. No human compaction. No risk of honeycombing.
The science: high powder content (cement + SCM + filler), viscosity-modifying admixture (VMA) preventing segregation, polycarboxylate ether superplasticizer for fluidity. The mix passes through L-box, J-ring, and V-funnel tests per EFNARC guidelines. Slump flow 600-750mm. Segregation resistance verified.
When site conditions demand it — congested rebar where vibration can't reach, architectural exposed surfaces requiring perfect finish, prefabricated elements in molds, or simply the desire to eliminate vibration noise and labor — Alpha Flow performs. It costs more than conventional concrete (premium 15-25%) but eliminates honeycomb risk entirely.
Built for complex placements
Flows under its own weight. Fills congested rebar zones. Self-levels with smooth surface. No mechanical compaction required.
Verified per EFNARC SCC 1, 2, or 3 class. Project-specific slump flow targets defined by application.
Verified flowability without segregation. Standard test per EFNARC. Result on every batch ticket.
Verified passing through congested rebar (3-bar L-box test). Demonstrates concrete fills behind tightly spaced bars.
500-550 kg/m³ powder (cement + SCM + filler). Viscosity-modifying admixture prevents segregation. Stable rheology.
Architectural columns with patterns. Curved walls. Decorative surfaces. Prefabricated elements with intricate details.
Built for these projects
Exposed concrete walls, decorative columns, sculptural elements. Where finish quality is non-negotiable.
Beam-column junctions, transfer slab edges, dense shear walls. Where vibration cannot reach all areas.
Casting yards. Prefabricated façade panels. Mass-produced architectural elements. Mold-cast elements requiring perfect surface.
Sound-absorbing walls. Acoustic panels. Sculpted public spaces. Where concrete is the visual statement.
The fine print, in full
| Compressive Strength (28-day) | 30 – 70 N/mm² (per grade) |
| Cement Type | OPC 53 with GGBS or fly ash |
| Total Cementitious Content | 480 – 560 kg/m³ |
| Filler Material | Fly ash, GGBS, limestone powder |
| Powder Content (cement + SCM + filler) | 500 – 580 kg/m³ |
| W/Powder Ratio | 0.32 – 0.38 |
| Coarse Aggregate (max size) | 12 – 16 mm (smaller for SCC) |
| Fine to Coarse Aggregate Ratio | Higher than conventional (sand-rich) |
| Chemical Admixture | PCE superplasticizer + VMA |
| Slump Flow | 600 – 750 mm |
| V-Funnel Time | 8 – 12 seconds |
| L-Box Passing Ratio | ≥ 0.85 |
| Segregation Index | < 15% |
| T50 Time | 2 – 5 seconds |
| Setting Time (initial) | 4 – 6 hours |
| Code Reference | IS 456:2000, EFNARC guidelines, IS 10262:2019 |
Alpha Flow mix designs
Resources by role
- Use Alpha Flow when finish quality matters: exposed concrete, architectural features, prefabricated elements.
- Or when vibration is impractical: congested rebar, deep narrow elements, complex molds.
- Lead time: 5-7 days for trial mix. Approved by structural consultant before commencement.
- Pricing: 15-25% premium over conventional grade. Cost offset by elimination of vibration labor and honeycomb risk.
- BOQ: "M[X] grade SCC, IS 456:2000 + EFNARC. Slump flow 600-750mm. V-funnel 8-12s. L-box ≥0.85. Segregation resistant. From Alpha Concrete or equivalent. SCC test results recorded per TM."
- Mix design code: AC-FL-[Grade]
- Documentation: Trial mix results, EFNARC test data per batch, mix design certificate, MTCs.
- On receipt: Slump flow (600-750mm), V-funnel (8-12s), L-box (≥0.85). Record on batch ticket.
- Placement: Pour from low height (<1m). No vibration. Allow to flow naturally. Multiple discharge points for large pours.
- Finish: Self-levels. Minimal finishing required.
- Curing: Minimum 14 days. Critical for surface durability.
About Alpha Flow
Ready to specify Alpha Flow?
Talk to an Alpha engineer about your project. We'll match the right grade and dispatch plan.
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The specifications shown represent typical ranges for Alpha Concrete's product family. Actual mix designs are project-specific and subject to verification by our QC team. Quoted specifications must be confirmed against actual lab results before commercial commitment. Contact our QC team for project-specific mix design certification.