Duconmix RSP 600

Retarding Superplasticizer Concrete Admixture

Manufactured by Ducon Construction Chemicals Industries Ltd at our Gazipur production facility, Duconmix RSP 600 is a liquid, sulphonated naphthalene polymer-based retarding superplasticizer admixture built for engineers, ready-mix operators, and contractors who need concrete that is still placeable when the truck finally reaches the pour. As a dual-action retarding admixture for concrete, it combines high-range water reduction with controlled set retardation in a single dose, imparting rheoplastic qualities to the mix and tested to ASTM C-494 Type B, D & G, EN 934-2 T11.1/11.2, and IS 9103. Specified as a concrete slump retention chemical on long hauls, it holds workability in excess of two hours at 25°C.

Pack Size:

5 kg, 10 kg, 20 kg, 250 kg drums and bulk

Consumption:

200 g – 620 g per 50 kg cement bag

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Retarding Superplasticiser Concrete Admixture
Ducon Tile Adhesive
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What is Duconmix RSP 600?

Concrete can lose workability during transport, especially in hot weather and long delivery routes. Duconmix RSP 600 helps maintain slump for extended periods while reducing water demand. It produces highly workable concrete that remains easier to place and compact, making it suitable for ready-mix concrete and projects requiring reliable slump retention.

The formulation is compatible with all common cements and cementitious binders, including fly ash, ground granulated blast furnace slag, silica fume, and metakaolin, so it drops into most existing mix designs without redesign. It also works alongside the other admixtures normally present in quality concrete: air entrainers, accelerators, retarders, extended set-control admixtures, corrosion inhibitors, and shrinkage reducers. Because no calcium chloride is used in its manufacture and chloride ion content stays below 0.2%, this concrete retarder admixture will neither initiate nor promote corrosion of embedded reinforcement, prestressing strand, or galvanised steel decking.

Water-reducing Concrete admixture
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Ducon Tile Adhesive

Application Process

1. Dosing:

Use 200–620 g of Duconmix RSP 600 per 50 kg of cementitious material as the recommended dosage. For high-performance concrete, the dosage can be increased up to 900 g per 50 kg after site trials. Always confirm the final dosage with trial mixes before concrete placement to achieve the required workability and setting time.

2. Timing:

Add Duconmix RSP 600 after 50–70% of the mixing water has been added. Do not mix it with dry cement or dry aggregates, as this can reduce performance. Adding it into wet concrete helps achieve better dispersion, improved workability, and effective water reduction. Automatic dosing systems can be used for consistent batching.

3. Mixing:

Mix until Duconmix RSP 600 is evenly dispersed and the required workability is achieved. Check the slump before placement and compare it with the approved trial mix. No pre-dilution is required, and the product can be added directly during batching.

4. Slump retention and workability:

Duconmix RSP 600 can maintain concrete workability for over 2 hours at 25°C. Retention time varies with temperature, cement type, aggregates, transport time, and mix design. Always verify performance through trial mixes, especially for long haul distances or hot weather conditions.

5. Placing and curing:

Place and compact the concrete as soon as it reaches the pour location. Start curing immediately after finishing to achieve the intended strength and durability. Proper curing is especially important in hot, dry, or windy conditions to reduce moisture loss and improve long-term performance.

6. Site Precautions:

Do not exceed the recommended dosage without technical approval. Store Duconmix RSP 600 in a cool, dry place between 5°C and 45°C, away from direct sunlight. Keep the container tightly closed after use. Avoid contact with eyes and skin, and keep the product out of reach of children.

Properties: Retarding Superplasticizer Concrete Admixture

Water-reducing Concrete admixture
Ducon Tile Adhesive
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Key Features:

  • Ready-to-use liquid; no pre-dilution or on-site blending required
  • High workability retained for longer periods — rheoplastic flow in excess of 2 hours at 25°C
  • Extended setting with longer workability, making it a dependable admixture for hot weather casting
  • Lower pumping pressure through long horizontal runs and vertical lifts
  • Resistance to segregation and bleeding even at high workability
  • Reduced water content for a given workability, lowering the water-cement ratio
  • Reduced permeability and reduced thermal peaks in mass pours
  • Reduced shrinkage, creep, and hair cracking in the hardened concrete
  • Dark brown free-flowing liquid, relative density 1.22 ± 0.02 at 25°C, pH ≥ 6, chloride ion content < 0.2%

Benefits: Duconmix RSP 600

At the batching plant: Duconmix RSP 600 helps maintain slump during transport, reducing the risk of rejected loads. Lower water demand supports the required concrete grade with improved workability, while consistent slump retention makes batching and delivery more reliable for ready-mix concrete production.

During placement: Duconmix RSP 600 maintains concrete workability for extended periods, giving more time for placing, pumping, compacting, and finishing. The mix remains cohesive during placement, helping reduce segregation and supporting smoother concrete flow, especially in hot weather conditions.

Over the structure’s service life: Lower water demand helps produce denser, less permeable concrete with improved strength and durability. It reduces water penetration, shrinkage, and the risk of cracking, while supporting long-term performance in foundations, slabs, retaining walls, and other reinforced concrete structures.

Water-reducing Concrete admixture
Ducon Tile Adhesive
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Water-reducing Concrete admixture
Ducon Tile Adhesive
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Duconmix RSP 600 : Usages Area

  • Ready-mixed concrete (RMC) production, where dispatch windows and traffic delays are unpredictable
  • Long hauls requiring two- to three-hour slump retention between plant and pour
  • Pumped concrete, including high-rise columns, cores, and long-line horizontal placement
  • Concrete containing granulated slag or pozzolans such as fly ash, metakaolin, and silica fume
  • Mass concrete pours raft foundations, transfer slabs, pile caps where thermal control matters
  • Hot weather concreting, where a concrete casting chemical Bangladesh sites can trust must hold workability at high ambient temperature
  • Roof slabs, podium decks, and large horizontal pours that must be placed and finished without cold joints

Applications & Use Cases

01

Ready-Mix Concrete Plants

Stabilises delivery quality across long dispatch queues and variable haul times. As a chemical for ready mix concrete, it protects slump between batching and discharge so loads arrive within specification rather than needing retempering or rejection.

02

Long-Distance Delivery

Purpose-built for concrete that must travel. As a slump retention admixture Bangladesh plants rely on for extended routes, its two- to three-hour workability retention means operators can serve sites well outside their usual radius without redesigning the mix or accepting slump loss as inevitable.

03

Pumped Concrete & High-Rise Structures

Lower pumping pressure moves cohesive, segregation-resistant concrete through long lines and vertical lifts. Reduces line blockages, pump wear, and the downtime that follows both on tall-building pours.

04

Mass Concrete Pours & Raft Foundations

Reduced thermal peaks limit the temperature differential that drives early thermal cracking in thick sections, while extended workability allows large placements to proceed in continuous lifts without cold joints.

05

Hot Weather Concreting

A specialist concrete admixture for high temperature placement. Holds workability through peak-summer ambient conditions, keeping the pour schedule intact when accelerated slump loss would otherwise halt work.

06

Roof Slabs & Podium Decks

A dependable admixture for roof casting and a practical chemical for slab casting, giving crews the working time needed to place, screed, level, and finish large horizontal areas to a consistent standard.

07

Bridges & Highway Structures

Denser, lower-permeability concrete resists chloride ingress and weather cycling over decades of traffic loading. Full ASTM C-494 and IS 9103 documentation supports approval by consulting engineers and government procurement teams.

08

Blended-Cement & Sustainable Mixes

Fully compatible with slag, fly ash, metakaolin, and silica fume, supporting mix designs that cut clinker content without losing target strength or workability.

09

Precast, Marine & Coastal Structures

Consistent flow and surface finish for precast units, with reduced permeability that resists saltwater and sulfate attack in piers, jetties, and coastal works.

Quality Assurance & Compliance

ISO 9001:2015

Quality Certified

TDS & MSDS

Available on request

Laboratory Tested

Quality Verified Products

Bulk & Export

Factory-direct dispatch

Frequently Asked Questions

Ducon Construction Chemicals Industries Ltd manufactures and supplies Duconmix RSP 600, a retarding superplasticizer admixture in Bangladesh produced under ISO 9001:2015 controlled batch conditions at our Gazipur facility. We supply ready-mix plants, infrastructure contractors, and site engineers factory-direct, with test certification, a full technical data sheet, and dosage guidance included rather than left to site-level guesswork. Because we are a manufacturer and not an applicator, accountability for material quality sits with us.

The retarding admixture price in Bangladesh for Duconmix RSP 600 is BDT 65,000 per tonne, supplied in 5 kg, 10 kg, 20 kg, and 250 kg drums or in bulk to suit both small site orders and full batching-plant requirements. Dispatch is factory-direct from Gazipur, so buying from a local concrete admixture supplier Bangladesh based means contractors and ready-mix operators avoid middleman markups as well as the import lead times, customs delays, and currency risk that come with sourcing from overseas.

Duconmix RSP 600 keeps rheoplastic concrete workable in excess of two hours at 25°C, which is the figure most buyers are really asking about when they search for a concrete slump retention chemical. As a slump retention admixture Bangladesh contractors use for long hauls, its actual performance depends on ambient temperature, cement type, aggregate characteristics, transport method, and the initial workability of the mix so confirm retention against trial-mix data for your specific conditions rather than assuming a fixed figure.

The recommended starting range is 200 g to 620 g per 50 kg of cementitious material, extending to 900 g per 50 kg for high-performance concrete subject to prior site trials. Over-dosage can cause a long extension of initial and final set, increased air entrainment, bleeding or segregation, quick loss of workability, and increased plastic shrinkage. A slight overdose may not reduce ultimate strength if the concrete is properly compacted and cured, but you should contact our technical team immediately rather than attempting to correct it on site.

Yes. It is specifically formulated as a superplasticizer for hot weather concreting and performs as a concrete admixture for high temperature placement, which is the dominant constraint on Bangladeshi sites from March to September. By combining water reduction with controlled set retardation, it holds workability through peak ambient temperatures so crews can place and finish before slump loss forces a stop.

No. Duconmix RSP 600 is non-corrosive. No calcium chloride or calcium chloride-based components are used in its manufacture, and chloride ion content remains below 0.2%, within the most stringent limits set by construction industry standards. It will neither initiate nor promote corrosion of reinforcing steel embedded in concrete, prestressed concrete, or concrete placed on galvanised steel floor and roof systems.

Duconmix RSP 600 complies with ASTM C-494 Type B, D and G, EN 934-2 Tables 11.1 and 11.2, and IS 9103, and is classified as Type G when tested to ASTM C-494. It is a sulphonated naphthalene polymer-based formulation with slump-retaining capability and an average relative density of 1.23 at 25°C. Full test documentation, TDS, and MSDS are supplied with every consignment and are the documents consulting engineers typically require before approving an admixture for structural use.

Yes. This retarding admixture for concrete is compatible with slag and pozzolans including fly ash, metakaolin, and silica fume, as well as with most admixtures used in quality concrete production normal, mid-range, and high-range water reducers, air entrainers, accelerators; retarders, extended set-control admixtures, corrosion inhibitors, and shrinkage reducers. That compatibility is what allows it to support lower-clinker, more sustainable mix designs without a separate redesign exercise.

Indirectly, yes and the mechanism matters. Duconmix RSP 600 does not add strength chemically; it reduces the water needed for a given workability, and the lower water-cement ratio is what delivers higher ultimate strengths. That is why it functions as a chemical for strong concrete in practice: the same cement content produces a denser, less permeable matrix. Adequate compaction and proper curing remain essential, since neither can be substituted by admixture dosage.

Yes. We work with dealers and distributors nationwide and support them with stock availability, technical documentation, and site trial assistance. Whether you are sourcing as a superplasticizer admixture dealer Dhaka based, operating as a concrete admixture distributor Bangladesh wide, or appointing us as your slump retention admixture supplier Bangladesh side for a specific project, our commercial team can quote volume rates and confirm lead times against your delivery schedule.