Product Overview

Centrament Flow 400 is MC-Bauchemie India high-performance ultra-high-range PCE superplasticiser occupying the highest performance tier of the Centrament Flow range — above the general-purpose Centrament Flow 200 in water reduction efficiency, dosage range, and applicability to high-strength concrete above C50. The distinction between Centrament Flow 400 and Centrament Flow 200 lies in the molecular architecture: Centrament Flow 400 uses a higher molecular weight PCE backbone with denser polyethylene oxide (PEO) side chain grafting, producing a longer-range steric hindrance cloud that provides greater inter-particle separation at a given dosage (or equivalent workability at a lower w/c ratio). In practical terms, Centrament Flow 400 achieves water reduction of 25 to 35 percent versus the 15 to 25 percent of Centrament Flow 200 at the respective working dosage ranges — this additional water reduction is what enables the production of C60 to C80 concrete with w/c ratios of 0.28 to 0.35 while maintaining the workability required for placement. High-strength concrete above C50 presents a demanding mixing and placement environment: the very low w/c ratio means the concrete has very low water content, leaving very little free water for lubrication of the aggregate-paste interface — without a high-efficiency superplasticiser at the correct dosage, high-strength concrete mixes become extremely stiff, difficult to pump, and almost impossible to place in column formwork with congested reinforcement. Centrament Flow 400 solves this problem by dispersing the cement particles so efficiently that the concrete achieves full workability despite the very low water content. The product is compliant with IS 9103 as a Type F or G high-range water-reducing admixture. Space Arc Engineering supplies Centrament Flow 400 for specialist concrete producers, high-rise building contractors, bridge and infrastructure contractors, and precast manufacturers in Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.

Applications

• High-strength concrete for high-rise building columns — production of C60 to C80 reinforced concrete columns in high-rise residential and commercial buildings (above 20 to 25 storeys) in Delhi NCR, Noida, and Greater Noida where the column design requires very high concrete strength to keep column cross-sections within the architectural constraints of the floor plan; in high-rise column concrete, the combination of very low w/c (0.28 to 0.35) for high strength, high cement content (450 to 500 kg/m3), and fine silica fume or metakaolin addition (for pozzolanic C-S-H densification) creates a very cohesive mix that without Centrament Flow 400 would be unworkable in 600 x 600 to 800 x 800 mm column sections with four or six layers of 25 to 32 mm main bars and closely spaced 10 to 12 mm lateral ties
• Ultra-high-strength precast concrete elements — production of C70 to C80 precast concrete elements including prestressed concrete sleepers, high-strength prestressed bridge beams, precast piles, and specialist precast structural elements for long-span structures, rail infrastructure, and industrial buildings; in precast production, the additional process advantage of Centrament Flow 400 over standard mid-range superplasticisers is the ability to achieve high early strength for steam curing or ambient curing demoulding at 8 to 12 hours while maintaining the low w/c ratio that delivers the final 28-day high strength requirement
• Bridge piers and pylons in aggressive exposure environments — production of high-durability C50 to C60 concrete for bridge piers in marine exposure (zone XS3, fully submerged or splash and tidal zone), de-iced road bridge piers (zone XD3, cyclic wet-dry chloride exposure), and industrial zone bridge structures in aggressive atmospheric environments (zone XA3, high sulfate or acid exposure) where the design life of 100 years requires a very low permeability concrete with w/c below 0.35 and silica fume addition to achieve the chloride diffusion coefficient and carbonation resistance required by IS 456 and IRC durability design guidelines
• Self-compacting high-strength concrete (SCC) for congested sections — production of self-compacting concrete (SCC) at C50 to C70 for columns, beam-column joints, and other heavily reinforced sections where conventional vibration cannot effectively reach all parts of the formwork; Centrament Flow 400 provides both the high water reduction for strength and the rheological modification for self-flow — achieving the combination of slump flow 600 to 700 mm, T500 spread time 2 to 5 seconds, and V-funnel flow time 6 to 12 seconds characteristic of SCC while maintaining a low w/c ratio for high strength and durability
• Reactive powder concrete (RPC) and ultra-high-performance concrete (UHPC) research and specialist applications — Centrament Flow 400 is used in research and specialist applications involving reactive powder concrete (no coarse aggregate, w/c 0.18 to 0.22, compressive strength 150 to 200 MPa) and ultra-high-performance fibre-reinforced concrete (UHPFRC) where the extreme low water content and very high cement and supplementary cementitious material content requires a superplasticiser at the top of the performance range to maintain any degree of workability at all

Key Advantages

• Ultra-high water reduction of 25 to 35 percent — enabling C60 to C80 concrete grades — the performance level that separates Centrament Flow 400 from mid-range superplasticisers; at a working dosage of 0.6 to 1.2 percent by weight of cement, Centrament Flow 400 reduces mixing water by 25 to 35 percent versus the reference mix without admixture, enabling w/c ratios of 0.28 to 0.35 that deliver characteristic compressive strengths of 60 to 80 MPa at 28 days with appropriate cement content and pozzolanic addition; this water reduction capability is inaccessible to standard mid-range PCE superplasticisers (Centrament Flow 200 type) and SNF-based superplasticisers at equivalent dosages
• Extended slump retention of 60 to 90 minutes for pumped high-rise concrete — the long PEO side chains of Centrament Flow 400 provide slow and sustained release of the steric hindrance effect as cement hydration proceeds, maintaining workability for 60 to 90 minutes at 25 degrees Celsius and 45 to 60 minutes at 35 degrees Celsius — sufficient for the transit time from RMC plant to pump input hopper and up a concrete pump line to the 15th to 30th floor column in a typical Delhi NCR high-rise project; slump retention is particularly critical for high-strength concrete because the high cement content and low w/c accelerates hydration and slump loss versus standard concrete grades
• Compatibility with silica fume and fly ash for high-strength durable concrete — Centrament Flow 400 is compatible with the supplementary cementitious materials (SCMs) routinely used in high-strength durable concrete: silica fume (5 to 10 percent by weight of cementitious — for very high strength and very low chloride permeability), Class F fly ash (15 to 25 percent by weight of cementitious — for workability improvement and long-term pozzolanic strength development), and GGBFS (25 to 50 percent for marine exposure durability); the superplasticiser-SCM interaction for Centrament Flow 400 is well-characterised and the product provides effective dispersion of silica fume agglomerates that are difficult to disperse with less efficient superplasticisers
• IS 9103 Type F compliance for use in any IS 456 or IS 1343 concrete — Centrament Flow 400 is formulated and tested to comply with IS 9103 requirements for Type F (high-range water-reducing admixture without retardation) or Type G (high-range water-reducing with retardation) classification, ensuring the product is approved for use in any concrete structure designed and specified under IS 456 Plain and Reinforced Concrete Code of Practice or IS 1343 Prestressed Concrete Code without requiring special structural engineer approval for a non-standard admixture