Calcium lignosulfonate, referred to as wood calcium, is a multi-component high molecular polymer anionic surfactant. Its appearance is light yellow to dark brown powder with a slight aromatic odor. It is easily soluble in water and has good stability. Its molecular weight is generally between 800 and 10,000, and this product has strong dispersibility, adhesion and chelating properties.
Most importantly, calcium lignosulphonate has a very wide range of uses, such as concrete water reducers, industrial detergents, pesticides and insecticides, herbicides, dye diffusing agents, coke and charcoal processing, petroleum industry, ceramics, wax emulsions, etc.
| Index items | Standard value | Test Results |
| Appearance | Brown powder | Meets the requirement |
| Moisture | ≤5.0% | 3.2 |
| PH value | 8–10 | 8.2 |
| Dry matter | ≥92% | 95 |
| lignosulphonate | ≥50% | 56 |
| Inorganic salts(Na2SO4 | ≤5.0% | 2.3 |
| Total reducing matter | ≤6.0% | 4.7 |
| Water insoluble matter | ≤4.0% | 3.67 |
| Calcium magnesium general quantity | ≤1.0% | 0.78 |
Especially in the construction industry, calcium lignin sulfonate is the most widely used and fundamental concrete water reducer. It not only reduces cement usage and saves costs, but also improves concrete’s performance and durability. With the development of new concrete technologies such as high-performance concrete and self-compacting concrete, calcium lignin sulfonate can be further modified to meet the specific needs of different concrete types. For example, in large-volume concrete construction, its retarding properties can effectively control hydration heat and prevent concrete cracking. In precast component production, it can optimize concrete’s setting time and early strength, improving production efficiency and product quality. In the future, as the construction industry’s demand for green, environmentally friendly, and high-performance building materials continues to grow, the application of calcium lignin sulfonate in the construction sector will continue to deepen and expand.
The main performance characteristics of calcium lignosulphonate water reducer:
Significant water reduction effect. Calcium lignin sulfonate water reducer can significantly reduce the water consumption of concrete, improve the fluidity of concrete, and make concrete easier to mix, transport and pour.
Improve concrete performance. Under the same water consumption, calcium lignin sulfonate water reducer can significantly improve the compressive strength and flexural strength of concrete and improve the durability of concrete.
Improve construction efficiency. As the fluidity of concrete is enhanced, the construction efficiency will also be improved accordingly, reducing construction time and labor costs.
Environmentally friendly and pollution-free. Calcium lignin sulfonate water reducer does not contain harmful substances, does not pollute the environment, and meets the requirements of green environmental protection.
Suitable for various types of concrete projects, such as industrial and civil construction, road and railway construction, precast concrete products and special projects.
