Bio-based set retarder and mild water reducer for concrete, mortar, grout and gypsum systems.
Sodium Lignosulfonate Retarder Powder Grade is a lignin-derived set-retarding admixture for cementitious and gypsum-based systems that need longer workability and controlled setting behavior.
This grade helps extend handling time, improve workability retention and provide mild water reduction for ready-mix concrete, mortar, grout and gypsum products.
It is useful in hot weather construction, long transit conditions and blended admixture systems that need balanced set control.
Key Performance Functions
Set Retardation
Delays initial and final setting time in cementitious and gypsum systems.
Workability Retention
Extends handling time in hot weather or long-distance transport conditions.
Mild Water Reduction
Can reduce water demand while maintaining flow in selected formulations.
Blend Compatibility
Can be evaluated with superplasticizers and other admixture components.
Main Specifications
| Parameter | Specification |
|---|---|
| Chemical Formula | C8H8O3S (monomeric approximation) |
| Appearance | Brown powder |
| Solubility | Completely soluble in water |
| pH Value (10% aqueous solution) | 9.0 – 11.0 |
| Bulk Density | 0.4 – 0.6 g/cm3 |
| Moisture Content | 10% max |
| Viscosity | Depends on concentration |
Note: The above values are typical technical data for reference. Final agreed specification and COA shall prevail.
Recommended Application Areas
| Application Area | Typical Use | Customer Value |
|---|---|---|
| Ready-Mix Concrete | Retarding admixture for transportation and placement control. | Extends workability window and supports slump retention. |
| Mass Concrete | Set control for large pours and heat management. | Supports continuous pouring and temperature-related process control. |
| Mortar & Grout | Open-time and flow support for masonry mortar and grout. | Improves plasticity and working time. |
| Gypsum Products | Processing aid for plasters and wallboard systems. | Improves processing time and forming consistency. |
| Admixture Blends | Component in construction chemical formulations. | Compatible with selected superplasticizers after lab testing. |
Suggested Usage Guidance
| Application | Typical Starting Dosage / Use | Technical Note |
|---|---|---|
| Concrete / mortar | 0.1% – 0.5% of cementitious material | Exact dosage depends on target retardation time and temperature. |
| Gypsum systems | Trial dosage required | Optimize by gypsum type and setting profile. |
| Admixture blends | Compatibility test required | Check performance with superplasticizers and accelerators. |
| Job site use | Trial mix required | Confirm cement, aggregate, ambient temperature and target strength. |
Dosage and application method should be verified by laboratory or pilot testing. Performance depends on raw materials, process conditions, temperature, moisture, mixing time and target technical results.
Related Pages
Buyer Questions
When is sodium lignosulfonate retarder grade useful?
It is most useful when concrete, mortar or gypsum systems need longer open time, slower set development or better handling in warm conditions.
Does it also reduce water?
Yes, it can provide mild water reduction in addition to set-retarding performance, depending on the cement system and dosage.
Should it be tested with other admixtures?
Absolutely. Compatibility with superplasticizers, accelerators and cement type should be checked by lab and field trial.
Need TDS, SDS or a Sample?
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