MC-Bauchemie Muraplast FRV
A chloride-free SNF superplasticizer that holds workability through the ready-mix journey and still pushes early and final strength higher, built for RMC plants, precast yards and mass-concrete pours across India.
What is it?
A liquid, SNF-based retarding superplasticizer that reduces water demand, retains slump for longer and builds early plus final concrete strength.
Where is it used?
Ready-mix concrete plants, precast and pre-stressed concrete units, marine and mass-concrete structures, and long-haul or long-pump pours.
Why use it?
Chloride-free per IS 456, meets IS 9103 and ASTM C-494/C-1017, keeps concrete pumpable without bleeding or segregation, and reduces cold-joint risk.
How is it applied?
Dosed into the mixing water at 0.8-2.0% (flow concrete) or 1.5-3.0% (high early strength) by weight of cement, added after roughly 70% of mixing water, never into the dry mix.
About MC-Bauchemie Muraplast FRV
Muraplast FRV is MC-Bauchemie’s SNF-based (sulphonated naphthalene formaldehyde) retarding superplasticizer, sold in India as the successor to the older Zentrament FRV line. It leans on a well-proven chemistry rather than the newer polycarboxylate ether (PCE) route, and that suits its job: SNF plasticizers are known for dependable slump retention and controllable retardation on long-haul or hot-weather pours, which is exactly the brief for Indian RMC plants supplying sites an hour or more away through city traffic. The product is chloride-free as tested to IS 456, non-toxic and non-flammable, and is formulated to meet IS 9103 plus ASTM C-494 Type B (retarding) and Type F (high-range water-reducing), with ASTM C-1017 Type II achievable depending on dosage. One admixture, tuned by dosage band, covers both a mild water-reducing retarder and a genuine high-range superplasticizer.
Space Arc sees Muraplast FRV specified most where concrete has to stay workable well past the point a standard plasticizer would stiffen — transit-mixer queues at a metro or high-rise site, or a marine pour needing an extended pumpable window. The trade-off is a slower initial set, which is why dosage trials matter more here than with a plain, non-retarding superplasticizer. Used correctly, it gives a homogenous mix, free of bleeding and segregation, that is noticeably easier on pump seals and pipelines.
The technical insight
The mechanism is classic SNF dispersion: the polymer adsorbs onto cement particles and gives them a strong negative surface charge, so particles repel each other electrostatically instead of clumping into flocs. That frees water otherwise trapped inside those flocs, letting the mix flow at a lower water-cement ratio without losing slump. Because Muraplast FRV sits at the higher end of the retarding spectrum, it also delays early hydration just enough to buy extra open time before initial set — the part that keeps a full truckload workable rather than stiffening within the first twenty minutes off the drum. The two dosage bands reflect this directly: 0.8-2.0% by weight of cement behaves as a flow-concrete plasticizer, while 1.5-3.0% pushes retardation harder specifically to chase good early strength once the concrete does set.
Where it is used
- Ready-mix concrete where transit time and traffic demand extended workability retention
- Precast and pre-stressed concrete needing reliable early strength for demoulding and stressing cycles
- Marine and massive/mass-concrete structures requiring long slurry retention
- Long-distance or high-rise pumped concrete, where consistent flow protects pump and line
- Hot-weather concreting, where built-in retardation reduces cold-joint risk between lifts
- Structural mixes using OPC, PPC or PSC, since the product suits all standard cements
Key advantages
- Chloride-free to IS 456, safe for reinforced and pre-stressed concrete
- One product, two dosage bands, covering flow-concrete and high-early-strength duty
- Extended slump retention cuts cold joints and site re-tempering
- Meaningful gains in both early and final compressive strength
- Homogenous, pumpable concrete free of bleeding or segregation
- Fewer pump blockages and less pipeline abrasion over a project’s pumping hours
- Meets IS 9103, ASTM C-494 Type B and F, and ASTM C-1017 Type II depending on dosage
Limitations & considerations
- Dosage is not fixed; MC’s own data sheet calls for site trials since cement, aggregate and weather shift the optimum
- Overdosing risks bleeding, segregation or an unpredictable, extended set
- Must be dosed with the mixing water, ideally after about 70% has gone in; adding it to a dry mix is not recommended
- Needs adequate mixing time after dosing for the plasticizing effect to fully develop
- Liquid product needs storage away from rain, direct sun, heat and frost; shelf life is 12 months unopened
- Being SNF-based, its water-reduction ceiling is lower than newer PCE superplasticizers used for very high-strength or self-compacting mixes
Selection & best practice
Treat the dosage bands as a starting point, not a fixed number — trial the actual cement, sand and aggregate combination before locking in a dosage, and revisit it if the cement source or weather changes materially. Add Muraplast FRV to the mixing water, not the dry mix, dosing once roughly 70% of the mixing water is already in the drum, and allow enough mixing time afterward for the plasticizing effect to unfold fully; a short mix cycle is a common cause of inconsistent slump. Where dosing happens directly into a transit-mixer truck on site, follow standard engineering and safety practice. For extra performance, such as air entrainment or corrosion inhibition, consult MC-Bauchemie’s technical team on combining it with other MC admixtures rather than pushing a single product past its intended range.
Specifications
| Product type | SNF-based retarding superplasticizer, slump-retaining |
| Form / colour | Liquid, brown |
| Density | 1.16 ± 0.03 kg/litre |
| Dosage (flow concrete) | 0.8% to 2.0% by weight of cement |
| Dosage (high early strength) | 1.5% to 3.0% by weight of cement |
| Standards compliance | IS 9103; ASTM C-494 Type B and Type F; ASTM C-1017 Type II (dosage dependent) |
| Chloride content | Nil / chloride-free as per IS 456 |
| Shelf life | 12 months from date of manufacture in unopened packaging |
| Pack sizes | 250 kg drums and 30 kg can |
Industry use cases
Ready-mix plants
Supplying high-rise and infrastructure sites across Delhi NCR where transit queue times demand extended slump retention without losing final strength.
Precast and pre-stressed units
Manufacturing beams and panels where predictable early strength lets forms be struck and stressing operations proceed on schedule.
Marine and mass concrete
Jetties, retaining structures and large pours where slurry has to stay workable for an extended period before placement is complete.
Hot-weather concreting
Summer pours in North India where built-in retardation buys extra working time and lowers the risk of cold joints between lifts.
Frequently asked questions
How is Muraplast FRV different from an ordinary superplasticizer?
What dosage should we use?
Is it safe in reinforced and pre-stressed concrete?
Can it be combined with other admixtures?
What happens if the dosage is too high?
How should it be stored and how long does it last?
How we position MC-Bauchemie Muraplast FRV
Within MC-Bauchemie’s own range, Muraplast FRV sits in the SNF-based, retarding-superplasticizer segment, with the group’s newer PCE-based PowerFlow and PowerFlex admixtures available where a project needs a higher water-reduction ceiling or self-compacting performance. Space Arc, as an authorised MC-Bauchemie distributor and applicator, can advise on the right family for a given mix and supply combinations MC itself recommends. For specifiers who standardise on a different brand, Fosroc’s Conplast SP430 covers similar ground as an SNF-based, slump-retaining superplasticizer for ready-mix and precast work — Space Arc supplies and applies both ranges, so the practical choice usually comes down to specification and site history rather than a real performance gap.
Fosroc Conplast SP430 — For specifiers who standardise on Fosroc, Conplast SP430 is a genuinely comparable SNF-based, slump-retaining superplasticizer for ready-mix and precast work, and Space Arc supplies and applies both ranges.
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