Granular Lignin Fiber for Asphalt is a road-grade fiber stabilizer designed for Stone Matrix Asphalt, hot mix asphalt, and other high-performance asphalt mixtures. It helps improve binder retention, reduce asphalt draindown, enhance mixture stability, and support longer-lasting pavement performance in demanding road construction projects.
Compared with loose fiber, granular lignin fiber is easier to feed, transport, store, and dose during asphalt mixture production. Its granular form supports better construction efficiency for asphalt mixing plants, road contractors, highway projects, municipal pavement, bridge deck pavement, airport runways, and heavy-load infrastructure applications.
For more road material solutions, you can also explore Luxin’s Roadway Material Additives and related asphalt pavement material products.
Basalt fiber, steel fiber, and lignin fiber improve structural performance, crack resistance, and extend pavement lifespan.
Powder water reducers and anti-rutting additives integrate smoothly into mixes, enhancing workability and simplifying construction.
All products are safe, sustainable, and suitable for highways, bridges, airports, municipal roads, and heavy-load infrastructure projects.
Granular lignin fiber absorbs and stabilizes asphalt binder within the mixture. This helps keep the binder evenly distributed and reduces the risk of binder separation during mixing, transportation, and paving.
Stone Matrix Asphalt usually contains a higher asphalt binder content than conventional dense-graded mixtures, which increases the risk of binder draindown. The FHWA Stone Matrix Asphalt guidance explains that fiber stabilizers are used in SMA to help prevent draindown of the thick asphalt film. Luxin granular lignin fiber is designed for this application, helping asphalt mixtures maintain stable performance during production and construction.
The granular structure makes the product easier to handle than loose fiber. It is suitable for asphalt mixing plants that need stable feeding, cleaner material handling, and more efficient dosing during continuous or batch production.
SMA asphalt relies on a stable stone-on-stone skeleton and rich asphalt mortar system. Granular lignin fiber helps reinforce the binder film, stabilize the asphalt mortar, and improve the overall performance of SMA mixtures used in high-traffic and heavy-load pavement areas.
By improving binder retention and asphalt mixture stability, granular lignin fiber helps support better resistance to rutting, cracking, binder segregation, and long-term pavement deterioration. It is suitable for projects that require strong durability under high temperature, repeated traffic loading, and demanding service conditions.
Luxin Granular Lignin Fiber for Asphalt is suitable for highways, bridge deck pavement, airport runways, municipal roads, tunnels, industrial roads, port roads, and other infrastructure projects where stable asphalt mixture performance is important.
| Serial Number | Project | Technical Requirements | ||
| Diameter Specification: 6.5 mm | ||||
| 1 | Particle Diameter (mm) | 6.5 ± 1 | ||
| 2 | Particle Length (mm) | E16 | ||
| 3 | Fibril and Particle Sieving | 4 mm Passing Rate (%) | ≤ 8 | |
| 4 | 2.8 mm Passing Rate (%) | – | ||
| 5 | Screening of Simulated Post-Fiber Particles | Increase in 4 mm Passing Rate (%) | ≤ 12 | |
| 6 | Increase in 2.8 mm Passing Rate (%) | – | ||
| 7 | Granulating Agent | Content (%) | 3-20 | |
| 8 | Rotational Viscosity (135°C) (mPa·s) | ≥200 | ||
| 9 | Ash Content (%) | 12-22 | ||
| 10 | Mass Loss (210°C, 1 h) (%) | ≤6, and no signs of combustion. | ||
| 11 | Moisture Content (%) | ≤5 | ||
| 12 | Bulk Density (kg/m³) | 350-550 | ||
| 13 | Density | Field Test | ||
| 14 | Lignocellulose after thermal extraction | Oil Absorption Rate (x) | 4-8 | |
| 15 | Wood Fiber Content (%) | ≥85 | ||
| 16 | Maximum Length (mm) | ≤6 | ||
| 17 | Average length | Field Test | ||
Granular lignin fiber works as a stabilizing fiber in asphalt mixtures. During asphalt mixing, the fiber disperses into the mixture and helps form a three-dimensional reinforcing network. This network helps absorb asphalt binder, stabilize the asphalt film, reduce binder draindown, and improve the internal stability of the mixture.
In SMA asphalt, the mixture contains a coarse aggregate skeleton and a rich asphalt mortar. Without a suitable stabilizer, asphalt binder may drain away from the aggregate during high-temperature production, silo storage, transportation, or paving. Granular lignin fiber helps hold the binder in place and supports a more uniform asphalt mixture.
For projects that also require higher deformation resistance, Luxin’s Asphalt Anti-Rutting Agent can be used as another asphalt pavement additive solution depending on the project mix design.
Granular lignin fiber is especially suitable for SMA asphalt mixtures where binder retention, draindown control, mixture stability, and pavement durability are required.
It can be used in expressways, national roads, provincial roads, and high-traffic highway sections that require stable asphalt pavement performance.
Recommended for urban main roads, bus lanes, intersections, BRT lanes, and road sections with frequent braking, acceleration, or stop-and-go traffic.
Granular lignin fiber helps improve asphalt mixture stability for bridge deck pavement, where durability and deformation resistance are important.
It is suitable for airport pavement areas that require stable asphalt mixture performance, reliable construction quality, and resistance to heavy loading.
This product is also suitable for logistics parks, container yards, port roads, industrial zones, and other heavy-load pavement areas.
The recommended dosage should be determined according to asphalt mixture type, binder content, aggregate gradation, traffic load, local climate, and project specifications. Laboratory mix design and trial mixing are recommended before large-scale construction.
During production, granular lignin fiber should be added evenly into the asphalt mixture to ensure stable dispersion and consistent performance. Contractors should control mixing temperature, mixing time, asphalt content, aggregate gradation, transportation time, and compaction process according to the project’s technical requirements.
If you need project-specific support, you can contact Luxin Material for product specifications, technical consultation, and quotation assistance.
Luxin provides Granular Lignin Fiber for Asphalt for contractors, distributors, asphalt mixing plants, and infrastructure material suppliers. The product is designed for convenient storage, transportation, feeding, and dosing during asphalt mixture production.
Packaging can be arranged according to project requirements, order quantity, and transportation conditions. Bulk supply and technical documents are available for road construction and pavement maintenance projects.
Shandong Luxin Road Maintenance Materials Co., Ltd. focuses on professional road maintenance materials, including road-grade lignin fiber, water-reducing agents, anti-rutting agents, emulsifiers, warm mix additives, and other infrastructure material solutions.
Choose Luxin when your project needs:
Stable supply of road-grade granular lignin fiber
Products suitable for SMA asphalt and asphalt pavement applications
Reliable technical specifications for engineering projects
Convenient granular form for asphalt mixing plants
Bulk supply capability for contractors and distributors
Fast response for quotations and technical documents
You can learn more about Luxin’s product range through the Products page or send your requirements through Contact Us.
Granular lignin fiber is used as a stabilizing fiber in asphalt mixtures. It helps absorb asphalt binder, reduce binder draindown, improve mixture stability, and support long-term pavement durability.
Yes. Granular lignin fiber is especially suitable for Stone Matrix Asphalt because SMA usually requires a stabilizing additive to help prevent binder draindown during production, transportation, and paving.
Granular lignin fiber is easier to transport, store, feed, and dose in asphalt mixing plants. Loose lignin fiber may disperse quickly, but granular fiber is often more convenient for automated feeding and large-scale asphalt mixture production.
Yes. By improving binder retention and mixture stability, granular lignin fiber helps support better pavement durability, especially in high-traffic, high-temperature, and heavy-load pavement applications.
The dosage depends on asphalt mixture design, binder content, aggregate gradation, climate conditions, and project specifications. Laboratory testing and trial mixing are recommended before formal construction.
You can send your application, project location, estimated quantity, packaging requirement, and technical specifications through the Luxin Material contact page. The Luxin team can provide product information, technical support, and quotation details.
Looking for reliable Granular Lignin Fiber for Asphalt? Contact Luxin Material to get technical specifications, product details, packaging information, and a quotation for your road construction or asphalt pavement project.
Shandong Luxin Road Maintenance Materials Co., Ltd. is state -owned technology enterprise Specializing inpremium road maintenance materials-primarily road-grade lignin fibers and water-reducing agents-and isdistinguished by its stable, high-capacity production capabilities and excellent industry reputation.
Reach out to us for reliable solutions and fast response
Our high-performance materials improve pavement strength, crack resistance, and long-term durability for highways, bridges, airports, and municipal projects. Designed for efficient construction and stable performance under heavy traffic and harsh conditions, Luxin solutions help reduce maintenance costs and extend infrastructure service life.
Shandong Luxin provides high-performance road maintenance materials designed to improve pavement durability, construction efficiency, and long-term infrastructure stability. With advanced manufacturing technology, strict quality control, and years of industry experience, our products are trusted for highways, bridges, airports, and municipal engineering projects.
Our materials are engineered to perform under heavy traffic, high temperatures, harsh climates, and long-term infrastructure operation conditions.
Whether you are a contractor, distributor, engineering company, or infrastructure project owner, Luxin provides professional products, stable supply capability, and technical support tailored to your project requirements.
