Centrament Nano 500
High-Performance Polycarboxylate Ether Superplasticiser for High-Strength Concrete, HPC, and Self-Compacting Concrete with Silica Fume
Authorized Project Distributor — MC-Bauchemie India | Space Arc Engineering, Ghaziabad
Product Overview
Centrament Nano 500 is a premium-grade, high-performance polycarboxylate ether (PCE) superplasticiser from MC-Bauchemie formulated at a higher molecular weight and modified side-chain architecture compared to standard PCE grades (such as Centrament Eco 400), engineered to deliver the extreme water reduction and extended slump retention required for high-strength concrete (HSC) grades M60, M70, and M80, high-performance concrete (HPC) incorporating silica fume or ultra-fine supplementary cementitious materials, and self-compacting concrete (SCC) with very low water-powder ratios. At the recommended dosage of 1.0 to 2.5 percent by mass of cementitious content, Centrament Nano 500 achieves water reductions of 30 to 40 percent relative to plain concrete of equivalent consistency — this extreme water reduction enables design w/c ratios of 0.28 to 0.35 in M60 to M80 concrete with total cementitious content of 450 to 550 kg per cubic metre, producing concrete with compressive strengths of 65 to 85 MPa at 28 days and very low chloride permeability (RCPT values below 1000 coulombs at 28 days in silica fume HSC). The compatibility of Centrament Nano 500 with silica fume (microsilica) is particularly important — silica fume addition at 5 to 10 percent replacement of cement dramatically increases the specific surface area and PCE adsorption demand of the binder system, and not all PCE grades perform consistently in high-silica-fume mixes. Centrament Nano 500 is specifically formulated to maintain low dosage and good slump retention even at 7 to 10 percent silica fume addition, enabling SCC and HPC mixes with the full silica fume durability benefit (pore refinement, pozzolanic reaction, reduced chloride diffusion) without excessive admixture dosage. In the Indian construction context, Centrament Nano 500 is the admixture of choice for demanding infrastructure applications: prestressed and post-tensioned bridge girders requiring C50 to C60 concrete with high early strength for rapid formwork striking; wind turbine tower base and pedestal foundations requiring M65 to M70 HSC; high-rise building core walls and transfer structures requiring M60 concrete; and industrial facilities with very high specification durability requirements in marine or chemical exposure. Space Arc Engineering supplies Centrament Nano 500 for specialist concrete producers, precast manufacturers, and infrastructure contractors in Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.
Applications
- High-strength concrete (HSC) M60 to M80 — for precast prestressed bridge girders, post-tensioned flat slabs, and high-rise building structural members requiring very high compressive strength
- Silica fume high-performance concrete (HPC) — for critical infrastructure in aggressive marine, industrial, or underground environments requiring ultra-low permeability and long-term durability
- Self-compacting concrete (SCC) with low w/c — for congested reinforcement zones in bridge pier diaphragms, underground station columns, and complex structural geometry where vibration is impractical
- Precast concrete manufacturing — early strength development for rapid demoulding of prestressed beams, hollow core slabs, and precast piles in precast plants across Delhi NCR and Uttar Pradesh
- Wind energy foundation concrete — M65 to M70 concrete for wind turbine tower base and transition piece foundations requiring very high strength and durability
- Nuclear and defence structure concrete — ultra-low permeability HPC for radiation shielding, containment, and critical protective structures requiring extreme durability specifications
Key Advantages
- Extreme water reduction — 30 to 40 percent water reduction enabling w/c ratios below 0.30 for M70 to M80 HSC without loss of fresh workability
- Exceptional slump retention — high molecular weight PCE architecture maintains SCC or HPC consistency for 90 to 120 minutes at normal dosage, critical for long transit and congested pour sequences
- Silica fume compatibility — specifically formulated for consistent performance at 5 to 10 percent microsilica addition without excessive dosage or erratic workability
- High early strength — low w/c combined with optimised admixture chemistry promotes rapid early strength gain — M60 concrete achieves greater than 40 MPa at 1 day, enabling rapid formwork striking in precast production
- Ultra-low permeability — w/c below 0.32 combined with silica fume produces concrete with RCPT below 500 coulombs — essentially impermeable to chloride diffusion
- IS 9103 and EN 934-2 compliant — chloride-free formulation suitable for reinforced and prestressed concrete in all exposure conditions per IS 456 and international standards
Technical Data
| Type | High-performance liquid polycarboxylate ether (PCE) superplasticiser — Type F high-range water reducer per IS 9103 and EN 934-2 |
| Standard | IS 9103 (Concrete Admixtures) and EN 934-2 Type F — ASTM C494 Type F (High-Range Water Reducing Admixture) |
| Water Reduction | 30 to 40 percent at dosage range — design-specific — mix trials recommended for exact dosage determination |
| Dosage Range | 1.0 to 2.5 percent by mass of total cementitious material — adjust per cement type, silica fume content, temperature, and target w/c |
| Slump Retention | 90 to 120 minutes at 25 degrees Celsius for SCC and HPC mixes — superior to standard PCE grades |
| Chloride Content | Chloride-free — safe for use in prestressed and post-tensioned concrete |
| Compatibility | Compatible with OPC 53, PPC, PSC, silica fume (5 to 10 percent addition), GGBS — trial mixes recommended for all HSC and SCC designs |
| Packaging | 200-litre drums and 1000-litre IBC bulk totes for ready-mix and precast plants |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
A precast concrete manufacturer in the Delhi NCR region is tendering for a supply contract of 2,000 prestressed concrete box girders for a highway bridge project, with the specification requiring C55 concrete (fck 55 MPa), maximum w/c of 0.35, slump 120 to 150 mm at delivery to the mould, early strength 40 MPa at 18 hours for steam curing cycle release, and chloride permeability below 1500 coulombs (RCPT at 28 days) — how should the mix design team specify the Centrament Nano 500 dosage and optimize the total mix design for this specification?
Designing a C55 prestressed box girder concrete with the specified combination of w/c below 0.35, early strength 40 MPa at 18 hours (for steam curing release), and RCPT below 1500 coulombs is a well-defined high-performance concrete design problem that Centrament Nano 500 is well-suited to solve. Here is the recommended mix design optimisation methodology. Target performance parameters: fck 55 MPa at 28 days means the design target mean strength fcm is 55 + 1.65 x standard deviation — for a precast plant with good quality control (standard deviation 4 MPa is achievable), fcm = 55 + 6.6 = approximately 62 MPa at 28 days. The w/c ratio required for 62 MPa in a silica fume OPC mix is approximately 0.32 to 0.35 (below the specified maximum of 0.35), which is the target. The 40 MPa at 18 hours (steam curing at 60 to 65 degrees Celsius for 12 to 14 hours after a 4 to 6 hour pre-curing period at ambient) requires very high cement activity and low w/c — OPC 53 grade cement (fineness above 330 m2 per kg) is essential; PPC or PSC with fly ash or GGBS will not achieve 40 MPa at 18 hours even with steam curing because the pozzolanic reaction of fly ash and GGBS is too slow at early age. Recommended mix design trial starting point: OPC 53 grade cement (conforming to IS 12269) at 440 kg per cubic metre; silica fume (IS 15388, Grade 920-D) at 30 kg per cubic metre (approximately 6.4 percent of cementitious); 20 mm crushed granite coarse aggregate (well-graded, LA abrasion below 25 percent) at 1000 kg per cubic metre; 4 to 6 mm coarse sand (manufactured sand MSand) at 350 kg per cubic metre; river sand (FM 2.6 to 2.8) at 350 kg per cubic metre; total water 165 kg per cubic metre (giving w/c = 165 divided by 470 = 0.351 — at the specification limit); Centrament Nano 500 at 1.8 percent by mass of cementitious (470 kg) = 8.5 kg per cubic metre of admixture. This starting-point mix is expected to produce: fresh concrete slump 140 to 160 mm immediately after mixing; slump retention 120 to 150 mm at 90 minutes of transit/waiting; early compressive strength 42 to 48 MPa at 18 hours after steam curing (60 degrees Celsius peak, 14-hour cycle); 28-day strength 65 to 75 MPa on site-cured cubes; RCPT at 28 days approximately 800 to 1200 coulombs (well below the 1500-coulomb specification limit). Optimisation steps for the mix design trial programme: Step 1 — Dose-response at fixed proportions: prepare 5 mixes varying Centrament Nano 500 dosage from 1.4 to 2.2 percent in 0.2 percent increments, measuring slump at 0, 60, and 90 minutes. Identify the minimum dosage that maintains 120 mm slump at 90 minutes — this is the production dosage. Step 2 — Aggregate optimisation: confirm the coarse-to-fine aggregate ratio by measuring the fresh concrete flowability — if the mix is harsh or tends to bleed at high slump, increase the fine aggregate proportion by 20 to 30 kg per cubic metre and reduce coarse aggregate by the same amount. Step 3 — Steam curing optimisation: the steam curing cycle (pre-cure period, heating rate, peak temperature, holding time, cooling rate) must be calibrated to achieve 40 MPa at 18 hours without causing delayed ettringite formation (DEF) at peak temperatures above 70 degrees Celsius. Keep the steam curing peak temperature at 60 to 65 degrees Celsius maximum — DEF risk increases sharply above 70 degrees Celsius in OPC concrete. A holding time of 8 to 10 hours at 60 to 65 degrees Celsius after a 4-hour ambient pre-cure is typically sufficient for OPC 53 at w/c 0.32 to 0.35. Test the steam-cured cube strength at 18 hours from casting (not from steam curing end) to verify the 40 MPa specification. Step 4 — RCPT validation: collect 100 mm diameter x 50 mm disc specimens from the final trial mix and test RCPT per ASTM C1202 or IS 14959 Part 2 at 28 days — confirm below 1500 coulombs. Step 5 — Production calibration: calibrate the batching plant admixture dispenser (flow-meter controller) for Centrament Nano 500 by volumetric measurement in a calibration cylinder — verify accuracy within plus or minus 3 percent of target dosage. Set the summer season dosage at 10 to 15 percent above the trial-determined production dosage to compensate for accelerated cement hydration at high concrete temperatures in Ghaziabad summer months. Space Arc Engineering supplies Centrament Nano 500 for precast concrete manufacturers and supplies the complete MC-Bauchemie admixture system for high-strength and high-performance concrete production across Delhi NCR, Ghaziabad, Noida, and Uttar Pradesh, with technical support for mix design optimisation and quality control programme development.
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Space Arc Engineering is an Authorized Project Distributor for MC-Bauchemie India serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.
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