MC-Bauchemie MC-TechniFlow FK33
A PCE superplasticizer from MC-Bauchemie built for slump retention, early strength and dependable flow in ready-mix and precast concrete across Delhi NCR.
What is it?
A liquid polycarboxylate ether (PCE) retarding superplasticizer for high water reduction and extended workability in fresh concrete.
Where is it used?
Ready-mix (RMC) batching plants, precast yards, self-compacting concrete (SCC) and composite-cement (PPC/PSC) mixes across India.
Why use it?
It cuts water demand sharply without the fast slump loss of older plasticizers, keeps concrete workable through transit delays, and still allows good early strength.
How is it applied?
Dosed at 2–50 g per kg of cement (about 0.2–5% by cement weight), added after the batching water, with the rate fixed through trial mixes.
About MC-Bauchemie MC-TechniFlow FK33
MC-TechniFlow FK33 is MC-Bauchemie’s current-generation PCE superplasticizer, sold in India through the company’s Navi Mumbai office and distributor network. RMC buyers may know it under its earlier name, Muraplast FK 30 — MC-Bauchemie folded it into the newer TechniFlow naming as part of a wider range reorganisation, without changing the chemistry. It sits in the superplasticizer bracket of MC’s admixtures portfolio, alongside sister products such as the Centrament Flow range and the air-entraining Centrament AIR series.
FK33 targets two problems common on Indian RMC operations: long haul times to a congested NCR site, and the fast slump loss older SNF or lignosulphonate plasticizers show in summer heat. Its retarding PCE backbone slows workability loss after mixing, so a truck stuck an extra 30–40 minutes in traffic is less likely to arrive unworkable, while still allowing good early-age strength once placed. It mixes quickly, disperses cement with low cohesiveness (useful for pumping), and is formulated free of corrosion-promoting chloride — relevant for RCC exposed to monsoon humidity.
The technical insight
The retarding character comes from the PCE molecule’s build: long polymer side chains give the steric dispersion that separates cement particles and frees trapped mixing water, while the backbone is tuned to delay hydration slightly rather than accelerate it — this is what lets the mix hold slump longer without extra water. The data sheet notes compatibility with air-entraining/foaming agents (its own Centripor SK) and confirms stability at elevated temperatures, relevant for plants running through Delhi’s 40°C summer window. The trade-off: overdosing, or stacking with another retarder, can push setting further out than intended, so dosage discipline matters more than with a standard non-retarding PCE.
Where it is used
- Ready-mix concrete production, especially long transit or pumping distances
- Precast concrete units — panels, pipes, blocks and similar cast elements
- Self-compacting concrete (SCC) for lower and medium strength grades
- Composite/blended cement concrete using PPC or PSC
- High-workability pumped concrete for congested, high-rise sites
- Hot-weather concreting schedules needing slight retardation
Key advantages
- High water reduction at moderate dosage, improving strength-to-cement ratios
- Good slump retention, cutting the need for site-added correction water
- Comparatively fast mixing time to reach full plasticizing effect
- Low cohesiveness, which helps pumpability and surface finish
- Chloride content held below 0.1% by weight — no added corrosion risk to reinforcement
- Compatible with air-entraining and foaming agents such as Centripor SK
Limitations & considerations
- The India data sheet doesn’t itself declare conformity to a specific IS, ASTM or EN standard — ask MC-Bauchemie for a written compliance letter for tender specs rather than assuming one.
- As a retarding PCE, overdosing or stacking with another retarder can push setting further out, risking bleeding or segregation if the mix isn’t properly cured.
- Dosage is cement- and aggregate-source specific — 2–50 g/kg is a starting range, not a fixed number, and needs trial batches per plant.
- Supplied only in 250 kg barrels and 30 kg cans — not a practical buy for small, one-off jobs.
- Needs protected storage away from frost, sun and heat — a step many site stores in Delhi NCR aren’t set up for by default.
Selection & best practice
Run a trial batch with the actual site cement, sand and aggregate before finalising dosage — the 2–50 g/kg range is wide enough that a PPC mix in Gurugram summer heat can need a very different number from a PSC mix cast in Delhi winter. Add FK33 after the mixing water, allow a full mixing cycle for it to unfold its plasticizing effect, and avoid correcting workability on-site with extra dosage without checking the original rate first, since the retarding effect can stack. Store drums under cover, off direct sun, away from frost, and pair the admixture with a proper curing regime — MC-Bauchemie recommends its Emcoril compounds — since lower-water PCE mixes dry faster if left uncured.
Specifications
| Chemical base | Polycarboxylate ether (PCE) — synthetic retarding superplasticizer |
| Form / Colour | Liquid, yellowish to light brown |
| Density (specific gravity) | Approx. 1.104 kg/dm³ |
| Recommended dosage | 2–50 g per kg of cement (approx. 0.2–5% by cement weight) |
| Max. chloride content | < 0.1% by weight |
| Max. alkali content | < 1.0% by weight |
| Shelf life | 12 months from date of manufacture, in unopened packaging |
| Pack sizes | 250 kg barrels; 30 kg cans |
| Storage | Protect from rain, direct sunlight, heat and frost |
Industry use cases
RMC plants (Delhi NCR)
Holds workable slump through NCR’s long haul times from plant to site, cutting rejected loads and on-site water correction.
Precast manufacturing
Dosed into mixes for pipes, blocks and panels where fast demoulding and a clean surface finish matter commercially.
Self-compacting concrete
Formulated into lower/medium-grade SCC needing high flow without segregation in congested reinforcement zones.
Hot-weather concreting
Chosen for its retarding profile to manage set times and cut cold-joint risk during Delhi summer pours.
Frequently asked questions
What is the recommended dosage?
Can it be used with PPC or slag cement, not just OPC?
Will it delay the setting time of my concrete?
How does this compare with Fosroc’s Conplast or Auramix range?
Does it meet IS 9103 or ASTM C494?
What pack sizes and shelf life should I plan for?
How we position MC-Bauchemie MC-TechniFlow FK33
Within MC-Bauchemie’s India range, FK33 is the retarding-PCE workhorse of the superplasticizer shelf, sitting alongside the newer Centrament Flow series and pairing, per MC-Bauchemie’s literature, with the Centripor SK foaming agent and the Emcoril curing range. For specifiers comparing brands, the closest genuine Fosroc equivalent is Auramix 400 — also PCE-based, for SCC and pumped concrete, IS 9103 and ASTM C494 Type G compliant — while Fosroc’s older, SNF-based Conplast SP430 suits projects standardised on Conplast for cost or legacy-spec reasons rather than PCE chemistry. As an authorised MC-Bauchemie distributor and applicator, Space Arc supplies FK33 directly with batch-tested dosage guidance for NCR conditions.
Fosroc Auramix 400 — Choose Auramix 400 when a tender spec explicitly calls for Fosroc’s own IS 9103 / ASTM C494 Type G compliance paperwork, or when a project has already standardised on Fosroc for other trades and wants single-vendor admixture sourcing.
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