MC-Bauchemie MC-PowerFlow 2239
A PCE superplasticizer engineered for foam-stable concrete, precast finish quality, and dependable workability retention on Indian sites.
What is it?
A liquid, PCE (polycarboxylate ether) based superplasticizer purpose-built to stabilise foam concrete and foam mortar while also performing as a high-range water reducer in precast and self-compacting concrete.
Where is it used?
Foam concrete and foam mortar production (with Foam Generator II/III), precast units, self-compacting concrete (SCC), and composite cement mixes needing high early strength and a clean surface finish.
Why use it?
Cuts water demand sharply without the harsh cohesion loss or slump crash typical of older SNF plasticizers, while holding foam bubble structure stable during mixing and placing – something generic superplasticizers aren’t tuned to do.
How is it applied?
Dosed at 2-50 g per kg of cement (roughly 0.2-5% by weight), added during mixing – ideally after the mixing water – with the exact dosage fine-tuned on site through trial batches for the target consistency class.
About MC-Bauchemie MC-PowerFlow 2239
MC-PowerFlow 2239 sits in MC-Bauchemie’s admixtures range as a polycarboxylate ether (PCE) based superplasticizer, but its real claim to fame is a job most general-purpose superplasticizers aren’t built for: keeping foam concrete stable. Foamed concrete and foam mortar work by trapping a pre-formed foam – commonly generated through Foam Generator II or III systems – inside a cement slurry, and that foam structure is fragile; it can collapse or segregate if the base mix isn’t chemically cooperative. MC-PowerFlow 2239 is formulated specifically to hold that foam structure together while still delivering the water reduction, flow, and early-strength benefits expected from a modern PCE admixture. For plants running lightweight foam concrete blocks, void-fill grouts, or insulation screeds alongside their regular RMC or precast lines, that dual capability is genuinely useful rather than a marketing add-on.
Beyond foam applications, MC-PowerFlow 2239 functions as a capable high-performance superplasticizer for precast concrete, self-compacting concrete, and composite cement mixes where high workability and a clean surface finish matter. It is chloride-free (under 0.1% by weight) and low in alkali content, so it will not compromise reinforcement or long-term durability, and it is designed to reduce the slump-loss problems that plague older sulphonated-naphthalene plasticizers – useful when a truck is stuck in Delhi NCR traffic longer than the pour schedule allowed for. Site teams should still treat the 2-50 g/kg cement dosage range as a starting point, not a fixed number: with a spread that wide, trial batching against your specific cement, aggregate, and ambient temperature is not optional, it is how you land on the right number for your mix.
The technical insight
Chemically, MC-PowerFlow 2239 belongs to the comb-polymer PCE family – a backbone that adsorbs onto cement particles combined with long side chains that provide steric hindrance, physically keeping particles apart so less water is needed for the same flow. What sets this specific grade apart is how that polymer architecture interacts with the surfactant-stabilised air voids in foam concrete: instead of destabilising the foam bubbles, a common failure mode when the wrong admixture is dosed into foam concrete, it is tuned to coexist with foaming agents such as MC’s own Centripor SK. That is a narrower formulation window than a general-purpose PCE, which is likely why MC-Bauchemie sells it as a distinct SKU rather than folding it into a broader superplasticizer line.
Where it is used
- Foam concrete blocks and panels for lightweight walling
- Foam mortar for void filling, backfill, and insulation screeds
- Precast concrete units needing fast demoulding and strength gain
- Self-compacting concrete (SCC) pours in congested reinforcement zones
- Composite/blended cement mixes (PPC, PSC) needing workability correction
- High-workability RMC where slump retention reduces on-site water addition
- Concrete production using Foam Generator II or III equipment
- Chloride-free, low-alkali admixture needs in durability-sensitive structures
Key advantages
- Purpose-built foam stabilisation, not a generic superplasticizer repurposed for foam concrete
- Strong water reduction at moderate, cement-efficient dosages
- Genuine slump retention, cutting the need for on-site re-dosing
- Good early strength development alongside the workability gain
- Chloride-free and low-alkali, safe for reinforced and prestressed work
- Compatible with air-entraining agents and MC’s own foaming agents
- Stable performance across a range of ambient temperatures
- Liquid, easy-to-batch form with a straightforward 12-month shelf life
Limitations & considerations
- Foam-specific tuning means it isn’t the most cost-effective choice for plain RMC that never touches foam concrete – a standard PCE superplasticizer may do that job for less
- The recommended dosage range of 2-50 g/kg cement is unusually wide, so trial batching is essential rather than optional
- Slight retardation is possible at higher dosages or lower ambient temperatures, per the manufacturer’s own note
- The TDS on file is dated January 2013 – buyers should ask MC-Bauchemie for the latest revision before finalising specifications
- Like most PCE admixtures, performance is sensitive to cement source and mix design changes, so a mix that worked last month isn’t guaranteed to behave identically with a new cement batch
- Barrel/can-only packaging (250 kg barrels, 30 kg cans) means smaller sites need to plan storage and part-usage carefully
Selection & best practice
Always trial-batch MC-PowerFlow 2239 with your actual cement, aggregate, and mix design before committing to a dosage – the manufacturer’s own 2-50 g/kg cement range is wide because performance shifts with cement chemistry, ambient temperature, and whether you’re targeting plain RMC or foam concrete. Add it after the mixing water for the most consistent dispersion, and if you’re producing foam concrete, verify foam stability with a fresh density check before pouring, not just a slump or flow test. Store barrels and cans under cover, away from direct sun and frost, and rotate stock within the 12-month shelf life – PCE admixtures can lose efficiency past that window even if they look unchanged.
Specifications
| Chemistry/Type | PCE (Polycarboxylate Ether) based superplasticizer |
| Form | Liquid |
| Colour | Yellowish to light brown |
| Density (Specific Gravity) | Approx. 1.05 kg/dm3 |
| Recommended Dosage | 2-50 g per kg of cement |
| Max Chloride Content | < 0.1% by weight |
| Max Alkali Content | < 1.0% by weight |
| Shelf Life | 12 months from date of manufacture |
| Packaging | 250 kg barrels, 30 kg cans |
Industry use cases
Lightweight Construction / Foam Concrete
Precast foam concrete block plants in NCR use MC-PowerFlow 2239 to keep the pre-formed foam intact through mixing and placing, avoiding the density variation that ruins block strength consistency.
Precast Concrete
Precast yards producing boundary panels, manhole covers, and utility units specify it for faster strength gain and cleaner demoulded surfaces without extra finishing labour.
RMC / Ready-Mix Concrete
RMC plants supplying Delhi NCR sites with long haul times lean on its slump-retention behaviour to avoid on-site water dosing that would otherwise weaken the mix.
Self-Compacting Concrete
For congested rebar zones such as lift cores and shear walls, SCC mixes built around this admixture flow into formwork without vibration while resisting segregation.
Insulation and Void-Fill Screeds
Foam mortar screeds for roof insulation and utility trench backfill use it in combination with the Centripor SK foaming agent for consistent, low-density fill.
Frequently asked questions
Is MC-PowerFlow 2239 only for foam concrete, or can I use it in normal RMC?
What dosage should we start with?
Does it contain chloride or affect reinforcement?
Can we combine it with other admixtures?
What’s the shelf life and how is it packaged?
How is it different from Fosroc’s superplasticizer range?
How we position MC-Bauchemie MC-PowerFlow 2239
Within MC-Bauchemie’s own admixtures family, MC-PowerFlow 2239 sits alongside general-purpose PCE superplasticizers like MC-PowerFlow 1160 and MC-PowerFlow 2695, and the slump-retention specialist MC-PowerFlow Perma – the 2239 grade is the one to reach for specifically when foam concrete or foam mortar is part of the job, while the others are the better fit for plain RMC, precast, or SCC work without a foaming component. Outside the MC range, Fosroc’s Auramix 420SR is a genuine PCE-based, slump-retaining alternative worth comparing on cost and site availability for projects that don’t need foam-specific stabilisation; Fosroc does not currently list a foam-concrete-dedicated superplasticizer to match the 2239’s niche, so for that specific application MC-PowerFlow 2239 remains the more targeted choice.
Fosroc Auramix 420SR — Specifiers running standard RMC, precast, or SCC without a foam-concrete component often compare MC-PowerFlow 2239 against Fosroc’s Auramix 420SR, a PCE-based superplasticizer with similar slump-retention behaviour but without the foam-stabilisation tuning.
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