CHEMFIX C50
High Range Water Reducing & Retarding Admixture for Ready-Mix Concrete
CHEMFIX C50 is a high-performance liquid concrete admixture specially developed for Ready-Mix Concrete, high-strength concrete and long-distance concrete transportation. It combines high-range water-reducing action with controlled setting retardation to provide improved workability, reduced water demand and extended handling time.
CHEMFIX C50 helps concrete producers and contractors achieve a more workable concrete mix without unnecessarily increasing the mixing water. Its retarding action helps maintain workability for a longer period, making it particularly suitable for ready-mix applications where transportation, pumping and placement may require additional time.
Key Advantages:
– High-range water reduction
– Improves concrete workability and flow
– Helps maintain desired slump for longer periods
– Provides controlled retardation of setting
– Helps facilitate long-distance transportation of ready-mix concrete
– Improves pumpability and placement
– Helps produce dense and more uniform concrete
– Supports higher-strength concrete mix designs by reducing unnecessary mixing water
– Can help reduce water-to-cementitious-material ratio when the mix is properly designed
– Helps improve surface finish and overall concrete quality
– Suitable for hot-weather concreting and applications requiring extended working time
– Compatible with a wide range of conventional concrete mix designs, subject to trial mixing
- Applications / Uses:
CHEMFIX C50 is suitable for:
– Ready-Mix Concrete
– High-Strength Concrete
– Pumped Concrete
– Large-volume concrete pours
– High-rise building construction
– Foundations and pile works
– Columns, beams and slabs
– Bridges and infrastructure projects
– Mass concrete applications
– Concrete requiring extended transportation time
– Concrete placement where longer working time is required
– Hot-weather concreting applications
How CHEMFIX C30 Works
CHEMFIX C50 disperses cement particles within the concrete mixture, allowing the mix to achieve the required consistency with reduced mixing water. This improved particle dispersion enhances the efficiency of the cementitious system and can provide better workability.
The retarding component helps control the rate of setting, providing additional time for transportation, pumping, placing and finishing when compared with an untreated mix.
The actual performance of an admixture can vary depending on cement type, cement content, supplementary cementitious materials, aggregate characteristics, water quality, temperature, batching sequence and other admixtures. Therefore, trial batching is recommended before establishing the final dosage for a project.
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Typical Dosage
Recommended dosage: 0.5%–2.0% by weight of cementitious materials.
The optimum dosage should be determined through laboratory or field trials according to:
– Required slump
– Desired water reduction
– Concrete strength requirement
– Required setting time
– Cement and SCM characteristics
– Ambient temperature
– Transportation distance
– Pumping and placement conditions
Note: Do not use a fixed dosage for every concrete mix. The optimum dosage should be established by trial mix before commercial production.
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Method of Use
CHEMFIX C50 can be added to the concrete mixing water or directly into the freshly mixed concrete, depending on the batching procedure.
Recommended Mixing Procedure
1. Prepare the concrete mix according to the approved mix design.
2. Add the required quantity of CHEMFIX C50 according to the trial-established dosage.
3. Mix thoroughly to ensure uniform dispersion of the admixture.
4. Check slump, workability and setting characteristics.
5. Adjust the dosage if required based on the desired performance.
6. For Ready-Mix Concrete, the dosage and addition sequence should be standardized according to the batching plant’s mixing procedure.
For best results, CHEMFIX C50 should be accurately dosed using a calibrated admixture dispensing system.
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Performance Advantages in Ready-Mix Concrete
Ready-mix concrete may require significant time between batching and final placement. CHEMFIX C50 is designed to help manage this challenge by combining high-range water reduction with controlled setting retardation.
It can help provide:
Better Workability → Easier Transportation → Improved Pumpability → Easier Placement → Better Finishing
This makes CHEMFIX C50 particularly useful for projects where concrete must remain workable during transportation and placement.
Concrete Strength
By reducing the amount of mixing water required to achieve a target workability, CHEMFIX C50 can assist in producing concrete with a lower water-to-cementitious-material ratio.
A lower water-to-cementitious-material ratio can contribute to higher concrete strength and improved durability when the complete mix design, curing and construction practices are properly controlled.
Important: Strength improvement depends on the complete concrete mix design and should be confirmed through laboratory testing.
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Quality Control
For consistent performance, CHEMFIX C50 should be evaluated through appropriate concrete performance testing, including:
– Slump / workability
– Water reduction
– Setting time
– Air content
– Compressive strength
– Concrete density
– Workability retention
ASTM C494/C494M includes performance classifications and testing requirements for water-reducing and retarding admixtures, including high-range water-reducing and retarding Type G admixtures.
Compatibility
CHEMFIX C50 is designed for use with conventional cement-based concrete mixes. Compatibility with:
– Portland cement
– Supplementary cementitious materials
– Mineral additives
– Other chemical admixtures
should be verified through trial batching before use in a specific project.
When multiple admixtures are used, they should preferably be introduced separately into the concrete unless compatibility has been established by testing.
Precautions
– Use the recommended dosage based on trial results.
– Do not overdose.
– Excessive dosage may significantly extend setting time and may adversely affect concrete performance.
– Always conduct a trial mix when changing cement, aggregate, SCM or other admixture sources.
– Do not mix concentrated CHEMFIX C50 directly with other admixtures unless compatibility has been established.
– Follow approved concrete mix design and site quality-control procedures.
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Packaging
CHEMFIX C50 is available in suitable packaging options for construction projects and site requirements.
Available Packaging:
1 L • 5KG• 10 KG • 20 KG •220 KG • 1000KG IBC TANK
Packaging availability may vary. Please contact CHEMFIX for current pack sizes.
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Storage
Store CHEMFIX C50 in its original, tightly closed container in a cool and dry place.
– Protect from direct sunlight.
– Protect from extreme temperatures.
– Do not allow the product to freeze.
– Keep the container closed when not in use.
– Avoid contamination with cement, dust or other chemicals.
– Stir or mix gently before use if required by the product specification.
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Why Choose CHEMFIX C50?
CHEMFIX C50 provides a practical solution for modern ready-mix concrete where high workability, reduced water demand and extended working time are important.
It is designed to help concrete producers achieve more efficient mix designs while supporting transportation, pumping and placement requirements.
CHEMFIX C50 — High Range Water Reduction with Controlled Retardation
Better Workability • Reduced Water Demand • Extended Working Time • Improved Pumpability • Ready-Mix Performance