MC-Bauchemie Centrament Eco 400
A polycarboxylate-ether superplasticiser that pushes water reduction to 20-30%, holding slump longer so ready-mix, precast and structural pours stay workable, dense and strong.
What is it?
A liquid polycarboxylate-ether (PCE) high-range water-reducing admixture for concrete, engineered to disperse cement particles far more effectively than older naphthalene or lignosulphonate plasticisers.
Where is it used?
Ready-mix plants, precast yards and site batching for M25-M50 structural concrete, bridges, infrastructure and green-building pours across Delhi NCR and Pan-India.
Why use it?
It cuts mixing water by roughly 20-30% at the same slump, which raises compressive strength and durability, or lets you keep the same strength while gaining flowability and pumpability.
How is it applied?
Dosed into the mix water or added at the batching plant at 0.5-1.5% by mass of cementitious material; never sprinkled onto dry cement or dosed neat onto aggregate.
About MC-Bauchemie Centrament Eco 400
MC-Bauchemie Centrament Eco 400 belongs to the modern generation of concrete superplasticisers built on polycarboxylate-ether (PCE) chemistry. Where traditional water reducers relied purely on electrostatic charge to loosen cement clumps, this admixture uses long comb-shaped polymer molecules that physically hold cement grains apart. The practical result is a concrete that flows readily at a much lower water content, which is exactly what an engineer wants: less water means a tighter capillary structure, higher strength and better resistance to the chloride ingress and shrinkage cracking that shorten the life of a structure. It is supplied as a brown-to-amber liquid, is chloride-free in line with IS 9103, and is compatible with the OPC 53, PPC and PSC cements commonly specified on Indian projects.
For contractors and RMC producers, the appeal is control. A single admixture can be tuned across the M25 to M50 range, dropping water for a durable, dense mix or opening up workability for a heavily reinforced pour that has to be pumped several floors. Because it also helps concrete hold its slump for a useful window after batching, it suits the realities of Indian sites, where transit time and hot weather routinely rob a mix of workability before it reaches the form. Space Arc supplies Centrament Eco 400 as an authorised distributor and applicator, with technical support on trial mixes, dosage optimisation and cement compatibility so the product performs the way the mix design intends rather than the way the drum happens to behave on site.
The technical insight
The mechanism that separates PCE admixtures such as Centrament Eco 400 from older plasticisers is steric hindrance. Each polymer has a backbone that anchors onto the cement grain and long side chains that project outward into the surrounding water. Once adsorbed, these side chains create a physical spacer effect, keeping neighbouring cement particles from flocculating back together the way electrostatic-only admixtures allow. That sustained dispersion releases the water otherwise trapped inside cement clumps, so the mix flows at a far lower water-cement ratio. Lowering the w/c ratio is the single most powerful lever on concrete quality, and this is why the same admixture can be read two ways: hold the slump and cut the water for strength and durability, or hold the water and gain flow for placement. The steric effect also decays more gradually than a purely electrostatic one, which is what gives the extended slump retention that matters on long transit hauls and in the heat of an Indian summer.
Where it is used
- Ready-mix concrete production in the M25 to M50 grade range where consistent workability and strength are required
- Precast and prestressed element manufacture needing high early density and clean surface finish
- Structural building concrete for columns, cores, rafts and heavily reinforced members
- Bridge decks, piers and general infrastructure concrete demanding low permeability and long service life
- Pumped concrete for high-rise and difficult-access pours where flow and slump retention are critical
- High-performance and durability-driven mixes with a deliberately low water-cement ratio
- Green-building and sustainability-focused projects looking to lower cement or water demand per cubic metre
- Hot-weather concreting where transit and placing times erode workability before discharge
Key advantages
- Delivers high water reduction of the order of 20-30%, lifting compressive strength at the same cement content
- Improves durability by tightening the capillary pore structure and reducing chloride and water ingress
- Extends slump retention so concrete stays placeable through longer transit and hot-weather conditions
- Chloride-free formulation, safe for reinforced and prestressed concrete per IS 9103
- Compatible with OPC 53, PPC (fly-ash) and PSC (GGBS-blended) cements used across Indian projects
- One admixture covers a wide grade band, simplifying stock and dosage control at the batching plant
- Supports flowable, self-compacting and pumped mixes without segregation when the mix is properly designed
- Lower VOC content than many conventional admixtures, aiding site air quality and green-building goals
Limitations & considerations
- PCE admixtures are dosage-sensitive; slight overdosing can cause bleeding, segregation or set retardation, so trial mixes are essential
- Performance varies with cement source and fly-ash or slag content, and every new cement combination should be verified before production
- Effect is temperature-dependent, generally stronger in cooler conditions and requiring dosage adjustment in high heat
- It reduces water demand but does not entrap air; a separate air-entraining admixture is needed for freeze-thaw exposure
- It is an admixture, not a waterproofing or crack-repair product, and cannot compensate for poor mix design, curing or workmanship
- Not designed to be mixed with incompatible admixtures; combining with naphthalene-based products should be avoided unless proven compatible
Selection & best practice
Always add Centrament Eco 400 to the gauging water or dose it at the batching plant during mixing, never onto dry cement or neat onto aggregate, and allow adequate wet-mixing time for the polymer to disperse fully. Start dosage optimisation from the lower end of the 0.5-1.5% by mass of cement window and adjust upward against a trial mix using the actual project cement and supplementary materials, watching for the onset of bleeding as the practical ceiling. Because the admixture is temperature-sensitive, review dosage seasonally and for hot-weather pours plan for the slump-retention window rather than the initial slump alone. Keep the water-cement ratio as the controlling parameter: the whole benefit of a PCE is lost if extra water is added back at the site. Store the drums or IBCs sealed, out of direct sun and above freezing, and stir or recirculate if the product has stood for a long period before use.
Specifications
| Product Type | Polycarboxylate-ether (PCE) high-range water-reducing superplasticiser |
| Chemical Base | Liquid polycarboxylate-ether polymer |
| Appearance | Brown to amber liquid |
| Standards | IS 9103 (Type F / Type G) and EN 934-2 |
| Chloride Content | Chloride-free per IS 9103 |
| Dosage Range | 0.5 to 1.5% by mass of cementitious material (optimise by trial mix) |
| Typical Water Reduction | Approximately 20-30% at standard dosage versus plain concrete |
| Cement Compatibility | OPC 53, PPC (fly ash) and PSC (GGBS-blended) cements |
| Packaging | 200-litre drums and 1000-litre IBC totes |
Industry use cases
Ready-Mix Concrete
RMC producers use it to hold consistent slump and strength across M25-M50 despatches while cutting water demand, keeping mixes placeable over longer transit distances in NCR traffic.
Precast Manufacturing
Precast and prestressed yards rely on the high water reduction for dense, high-early-strength elements with clean de-moulded surfaces and faster bed turnover.
Bridges & Infrastructure
Deck, pier and substructure concrete benefits from the low permeability and durability that a reduced water-cement ratio delivers on long-life infrastructure assets.
High-Rise & Structural
Contractors placing heavily reinforced cores, rafts and columns use it to achieve flowable, pumpable concrete that reaches upper floors without adding water on site.
Green Building
Sustainability-focused projects use its water and cement efficiency, plus lower VOC content, to trim the embodied impact of each cubic metre of concrete.
Frequently asked questions
What is MC-Bauchemie Centrament Eco 400 used for?
What dosage of Centrament Eco 400 should I use?
How much water can it save in a mix?
Is it safe for reinforced and prestressed concrete?
Which cements is it compatible with?
Does it make concrete waterproof or repair cracks?
How we position MC-Bauchemie Centrament Eco 400
Centrament Eco 400 sits in Space Arc’s admixtures line-up as MC-Bauchemie’s mainstream PCE superplasticiser for structural and ready-mix concrete. Within the same MC-Bauchemie Centrament family, pair it with Centrament Air for entrained-air freeze-thaw or finish requirements, Centrament Rapid where set acceleration is needed, and Centrament Proof for integral waterproofing of the mix, since none of these functions is covered by a plain superplasticiser. Where a project specifies Fosroc, the direct counterpart in our catalogue is Fosroc Auramix 400, and for heavily retarded or self-compacting work Fosroc’s higher-end Auramix grades are worth considering. Buyers cross-shopping other brands we carry can also look at Sika’s ViscoCrete PCE range as a specification alternative; our technical team can map an equivalent grade and dosage whichever brand the mix design calls for.
Fosroc Auramix 400 — Choose the Fosroc option when the project or client specification names Fosroc, or when you want a like-for-like PCE superplasticiser backed by Fosroc’s Pan-India support network.
Related Concrete Admixtures products
Source MC-Bauchemie Centrament Eco 400 for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.