Lignosulfonate Retarder (Water Reducer & Set Retarder)
CAS Number: 8062-15-5
Lignosulfonate-based concrete admixture is a natural by-product of the pulp industry, functioning simultaneously as a normal-range water reducer (8–12%) and a mild set retarder. It is one of the most cost-effective concrete admixtures available and is widely used where modest workability improvement and retardation of 1–3 hours are needed. Available in calcium and sodium salt forms.
Technical Specifications
| pH | 4.0-6.0 |
| appearance | Brown to dark brown powder |
| solid content (%) | 92±2 |
| sugar content (%) | ≤3 |
| water reduction rate (%) | ≥8 |
Applications
- Mass concrete and dam construction to control heat
- Hot-weather concreting requiring extended workability
- Grouting applications in oil-well cementing
- Normal-strength ready-mix concrete
- Agricultural and horticulture soil conditioner as by-product
Key Features
- Natural, renewable raw material with low environmental impact
- Dual function as water reducer and set retarder
- Most economical concrete admixture for standard applications
- Low chloride content safe for reinforced concrete
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