Duconmix ESP 100

Superplasticizer Admixture

Manufactured by Ducon Construction Chemicals Industries Ltd at our Gazipur production facility, Duconmix ESP 100 is a chloride-free, synthetic polymer-based superplasticiser admixture developed for engineers and precasters who need rheoplastic, free-flowing concrete at a genuinely low water-cement ratio. As a high range water reducing superplasticizer admixture, it cuts mixing water sharply, lifts early-age compressive strength, and carries concrete into congested reinforcement without segregation formulated to EN 934-2 Tables 3.1 and 3.2, ASTM C-494 Types A and F, and BS 5075 Parts 1 and 3.

Pack Size:

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

Consumption:

400 g to 750 g per 50 kg of cementitious material

What is Duconmix ESP 100?

Most site problems that get blamed on “bad concrete” actually start at the batching stage, with water. A crew asks for more slump, the operator adds a few extra litres, and the pour goes smoothly until the cylinders come back below grade, the surface dusts, and hairline cracking appears along the soffit. Add water and you gain workability but lose strength and durability; hold the water back and the mix will not travel through a congested reinforcement cage or fill a complicated formwork profile. That trade-off is the exact problem a superplasticizer admixture exists to remove. Duconmix ESP 100 is built on synthetic polymers that allow mixing water to be reduced considerably while concrete strength is enhanced significantly, particularly at early ages. The product is chloride-free, so there is no contribution to reinforcement corrosion in precast beds, transfer slabs, deep pile caps, and heavily reinforced columns.

Ducon Construction Chemicals Industries Ltd manufactures Duconmix ESP 100 under controlled batch conditions at its own plant and issues every consignment with a technical data sheet, test documentation, and written dosage guidance rather than leaving dosing to site-level guesswork. For procurement teams comparing concrete admixture prices in Bangladesh across several suppliers, that batch-to-batch consistency is usually the deciding factor over a marginally cheaper quote, and it is one reason Ducon is counted among the industrial concrete admixture suppliers BD precast yards and ready-mix operators come back to for repeat orders.

Application Process

1. Dosing:

Duconmix ESP 100 is normally dispensed at 400 g to 750 g per 50 kg of cementitious material. Subject to successful trial mixes, higher dosages may be used up to 1.5 kg per 50 kg of cementitious material. Because cement source, aggregate grading, ambient temperature, and the target water reduction all vary between jobs, establish the working dosage by trial mix before committing to full-scale pours.

2. Timing:

Add Duconmix ESP 100 to the mix with the gauging water. The plasticising effect and water reduction are higher when the admixture is introduced after 50–70% of the mixing water is already in the batch. Never add Duconmix ESP 100 to dry cement, and do not dose it onto dry aggregate — both practices waste product and give inconsistent results.

3. Mixing:

No extension to the normal mixing time is necessary. Where Duconmix ESP 100 is used to produce flowing concrete at site from ready-mix trucks, it can be added through the feed hopper at the rear of the truck; mix for 3 minutes at 10 rpm before discharge to produce a fully homogeneous mix. Check slump or flow after mixing and before placement.

4. Water-cement ratio:

To realise the early-strength benefit, take advantage of the water reduction rather than the added flow alone. Where very high early strength is required, keep the water-cement ratio low and use the reduced water rather than increasing workability that is the mechanism by which Duconmix ESP 100 produces concrete stronger than an untreated mix of the same workability.

5. Placing and curing:

Place and compact promptly after batching. Initial and final sets do not change significantly compared with concrete containing no admixture, so normal finishing windows apply. Cure thoroughly in hot, dry, or windy conditions; the low water content that gives this concrete its strength also makes early moisture retention critical.

6. Site Precautions:

Do not exceed the recommended dosage without technical approval. A severe overdose will retard both initial and final set, slightly increase air entrainment, and increase workability beyond what the mix can hold. Store drums under cover, out of direct sunlight and away from temperature extremes; shelf life is at least two years under those conditions. Avoid contact with eyes, mouth, skin and foodstuffs, treat splashes immediately, seek medical attention if ingested, and keep the product away from children and animals.

Properties: Superplasticizer Admixture

Key Features:

Ready-to-use liquid admixture; no site blending or pre-dilution required
High range water reduction from synthetic polymer chemistry, allowing considerable cuts in mixing water
Produces very flowable, rheoplastic concrete at a low water-cement ratio
Marked early-age strength gain that is retained at later ages, in both air-cured and steam-cured production
Initial and final setting times remain close to those of untreated concrete
Custom nanotechnology-derived PCE molecule: long side chains, short main chains, minimal hindrance to hydration
Chloride-free to EN 934 no contribution to reinforcement corrosion; compatible with all cements and admixtures meeting ASTM standards
Dark brown liquid, specific gravity 1.210 at 25°C, freezing point 0°C
Certified to EN 934-2 Tables 3.1 and 3.2, ASTM C-494 Types A and F, and BS 5075 Parts 1 and 3

Benefits: Duconmix ESP 100

At the batching plant: considerable water reduction means a superplasticizer admixture can be used to reduce cement content in concrete while still hitting the specified strength grade, helping precast yards and ready-mix operators manage material cost per cubic metre.

During placement: rheoplastic, free-flowing concrete moves through congested reinforcement and complicated formwork without segregation, which compresses the critical path on schedule-driven projects more reliably than any amount of extra labour.

Over the structure's service life, because the water-cement ratio is lower, all other properties of the hardened concrete improve significantly: lowered permeability, reduced shrinkage and creep, and an increased modulus of elasticity. Lower permeability restricts chloride and sulphate ingress, which determines whether a marine deck or a water-retaining structure needs intervention at year fifteen or year forty.

Duconmix ESP 100 : Usages Area

Precast concrete production, where mould turnaround depends on early-age strength
Low water-cement ratio concrete and high-performance structural mixes
Complicated formwork profiles and sections with congested reinforcement
Bridge decks, girders and highway structures that must resist chloride ingress and weather cycling for decades
Transfer slabs, deep beams, raft foundations and pile caps
High-rise columns and shear walls placed by pump at height
Tunnel linings, diaphragm walls and other below-grade structural elements

Applications & Use Cases

Precast Concrete Yards

Delivers high early strength for faster demoulding and quicker bed turnaround. Flowable mixes fill moulds completely, producing a consistent, blemish-free finish.

Bridges & Highways

Lowers permeability at the mix design stage, restricting chloride attack and weather-cycle deterioration. Essential where service life is measured in decades, not warranty periods.

High-Rise & Congested Reinforcement

Carries concrete through dense rebar cages and around couplers without segregation or honeycombing. Ideal for columns, shear walls and transfer structures.

Tunnels & Underground Structures

Produces dense, low-permeability concrete for linings and diaphragm walls, limiting water ingress in sub-surface works such as metro tunnels and basement boxes.

Water Tanks & Reservoirs

Reduces the pore structure that allows leakage, supporting watertight construction for potable water storage and industrial reservoirs.

Foundations & Raft Slabs

Enables placement of large, deep pours at low water-cement ratio, reducing shrinkage and creep in mass elements below grade.

Sewage & Water Treatment Plants

Lower permeability slows chemical attack on tanks, channels and clarifier walls, extending the service life of structures that are costly to take offline.

Marine & Coastal Structures

Restricts chloride and sulfate penetration in piers, jetties and sea-facing decks where saltwater exposure is continuous.

Complicated Formwork & Architectural Concrete

Rheoplastic flow fills intricate profiles and tight corners, giving clean arrises and a smooth off-form face without excessive vibration.

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

What is a superplasticizer admixture and what problem does it actually solve?

A superplasticizer admixture is a high range water reducer that disperses cement particles so concrete flows freely at a much lower water content than it otherwise could. It solves the oldest trade-off on any site: adding water makes concrete easier to place but weaker and more permeable, while holding water back protects strength but makes the concrete difficult to place. Duconmix ESP 100 lets you keep the flow the crew needs and the water-cement ratio the design demands at the same time, which is why the early-age strength gain is so much more pronounced.

What is the correct dosage of Duconmix ESP 100?

The normal dispensing rate is 400 g to 750 g per 50 kg of cementitious material. Subject to successful trials, dosages up to 1.5 kg per 50 kg of cementitious material may be used. Always confirm the working rate with trial mixes, because cement source, aggregate grading, moisture content and ambient temperature all shift the response. Our technical team will review trial results and recommend a dosage window rather than a single fixed figure.

What happens if the superplasticizer admixture is overdosed on site?

A severe overdose of Duconmix ESP 100 produces three effects: retardation of both initial and final set, a slight increase in air entrainment, and an increase in workability beyond the intended target. None of these are dangerous, but all of them disrupt the pour program; delayed set holds up finishing and formwork cycles, and excess air can affect strength. This is why dosage should not be increased without technical approval.

Is Duconmix ESP 100 safe for reinforced concrete?

Yes. Duconmix ESP 100 is chloride-free to EN 934, so it makes no contribution to reinforcement corrosion. That is precisely why it is specified for precast beds, transfer slabs, deep pile caps, heavily reinforced columns, bridge girders, marine decks and other structures where corrosion risk governs design life.

Which standards does this high range water reducing superplasticizer admixture comply with?

Duconmix ESP 100 is formulated to EN 934-2 Tables 3.1 and 3.2, ASTM C-494 Types A and F, and BS 5075 Parts 1 and 3 (superseded by EN 934-2). Compliance documentation is issued with supply, which matters when consulting engineers or government procurement teams require standard conformity before an admixture is approved for infrastructure use in Bangladesh.

Where can I find reliable industrial concrete admixture suppliers in Bangladesh?

Ducon Construction Chemicals Industries Ltd. is one of the industrial concrete admixture suppliers BD engineers rely on for batch-to-batch consistency, ISO 9001:2015 certification, and factory-direct supply from our Gazipur production facility. Duconmix ESP 100 is supplied with a technical data sheet, test documentation and written dosage guidance, so precast yards, ready-mix plants and site engineers are working from verified figures rather than site-level guesswork.

What are the main concrete admixture types and their uses in BD construction projects?

The main concrete admixture types and their uses in BD projects fall into a few clear groups: water reducers for strength and workability, retarding superplasticizers for long-haul ready-mix delivery, early strength admixtures for rapid formwork cycling, and high range PCE-based superplasticizers such as Duconmix ESP 100 for low water-cement ratio, high-performance and precast concrete. Ducon manufactures the full range under the Duconmix line, so a project can source every admixture type from one accountable supplier.

Can a superplasticizer admixture reduce cement content in concrete?

It can, and this is one of the strongest commercial arguments for using one. Because Duconmix ESP 100 allows mixing water to be reduced considerably, the target strength grade can be reached with less cement per cubic metre cement being consistently the most expensive ingredient in any mix design. Using an admixture to reduce cement content in concrete also supports concrete admixtures for sustainable building BD objectives by lowering the embodied carbon of each cubic metre placed.

Which concrete chemical for bridge and highway projects offers the best long-term durability?

For a concrete chemical for bridge and highway projects, long-term durability is governed by permeability and chloride resistance. Duconmix ESP 100 lowers the water-cement ratio at the mix design stage, which reduces permeability and restricts chloride ingress and weather-cycle deterioration the two mechanisms that most often shorten the service life of decks and girders exposed to the elements for decades.

What is the concrete admixture price in Bangladesh for Duconmix ESP 100?

Concrete admixture prices in Bangladesh vary with dosage, pack size and order volume, so pricing is quoted against your grade requirement and consumption rather than as a fixed list rate. Send us your target grade, slump or flow, cement source and pour conditions, and our team returns a factory-direct quotation with a recommended dosage range. Sample quantities are available for trial mixes before any bulk commitment.