Lignin fiber is an organic fiber obtained by chemical treatment of natural wood. It is mainly used in road paving and is an indispensable stabilizer. Alfa Chemistry offers lignin fiber products to meet your specific needs.
Introduction
Lignin fiber usually has a cotton-like appearance, but sometimes, such as the lignin fiber used as a stabilizer in stone mastic asphalt pavement, it is granular. Lignin fiber is white or off-white, and is screened, split, high-temperature treated, bleached, chemically treated, neutralized, and sieved into fibers of different lengths and coarsenesses to meet the needs of different application materials. In addition, lignin fiber is a very chemically stable substance under normal conditions and is not corroded by common solvents, acids, and alkalis.
Performance Parameters
| Length | ≤6 mm |
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| Ash content | ≤18% |
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| pH value | 7.0 ± 0.5 |
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| Oil absorption rate | Not less than 5 times the mass of the fiber itself |
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| Moisture content | ≤5% |
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| Heat resistance | 230 ℃ (It can reach 280 ℃ in a short time) |
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Features
- Strength and durability. Lignin fiber is known for its strength and durability, making it a suitable material for various applications where high strength is required. It can withstand heavy loads and resist wear and tear, making it very suitable for use in machinery, construction, and industry.
- Water resistance. Lignin fiber has natural water-resistant properties, which make it suitable for use in applications where exposure to moisture is a concern. This makes it a good choice for outdoor applications or in environments where moisture is present.
- Thermal insulation. Lignin fiber exhibits good thermal insulation properties, helping to maintain the temperature within a structure. This makes it a good choice for applications where thermal insulation is required, such as in buildings or industrial equipment.
- Eco-friendly. Being a natural fiber derived from plant material, lignin fiber is biodegradable and renewable. It is non-toxic, odorless, non-polluting, non-radioactive, does not affect the environment, and is harmless to the human body. This makes it an environmentally friendly choice.
- Compatibility with other materials. Lignin fiber can be easily blended with other materials such as polymers, resins, or other natural fibers to enhance certain properties or create composites with specific characteristics. This versatility expands the range of applications where lignin fiber can be used.
The Role of Lignin Fiber in Asphalt Pavement
Lignin fiber plays an important role in asphalt pavement, including strengthening, stabilizing, adsorbing, dispersing and thickening. Specifically:
- Strengthening effect. Lignin fiber forms a three-dimensional mesh in asphalt mixture, which has a certain degree of anti-cracking effect under low temperature conditions.
- Stabilizing effect. Lignin fiber can stabilize the asphalt film, prevent oil spilling, and improve high temperature stability.
- Adsorption effect. Lignin fiber can increase the adhesion between asphalt and mineral powder, greatly improve the viscosity of asphalt mastic, and strengthen the bonding ability between aggregates.
- Dispersing effect. Lignin fiber stabilizer has good dispersibility, which can make asphalt, mineral powder and other components evenly dispersed in the mixture, preventing the formation of colloid-like substances and causing oil spots on the road.
- Thickening effect. Lignin fiber stabilizer in asphalt mixture absorbs more asphalt through the adsorption of asphalt on the fiber surface, so that a thicker asphalt structure film is formed on the aggregate surface, improving the durability of the mixture.
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