Type of fiber

Advantage

Disadvantage

carbon fiber

High strength, high elastic modulus, low density

1. Poor temperature resistance in air, poor oil absorption
2.价格很高 high price

lignin fiber

toughening and viscosity-increasing effect to improve the aging resistance and water stability of the mixture

1.。Easy to absorb moisture, the moisture absorbed by the fiber can form a water film between the aggregate and asphalt binder, which is easy to cause water damage. Therefore, needs to be strictly waterproof, damp and agglomerated before use.
2. mainly used in the SMA mixture. The effect is general on the macroporous hot mix asphalt mixture, because the lignin fiber itself has voids inside, therefore the asphalt oil does not function after entering these voids, and the oil absorption rate is wasted.
3. Poor aging resistance and durability. easily aged, degraded, and even decomposed into substances such as carbon dioxide, water and coke, which can even contaminate the asphalt in the mixture.

glass fiber

After more than 20 years of development, its output and market application are the largest at present. The variety is relatively comprehensive, forming a series of specifications, currently developing towards high performance

1. Although the specification of glass fiber is more comprehensive, the performance of each specification is single, and the comprehensive performance is not high
2. General glass fiber i.e. alkali - free glass fiber, poor alkali resistance, not suitable for the highway engineering.

polymer fiber

1. High temperature stability improved significantly, low temperature cracking resistance increased, frost resistance and anti-water damage increased.
2. Low density, numerous fibers

 Not resistant to high temperatures, although some fibers have a melting point of up to 250 ° C in air, but in asphalt, the fibers may begin to melt at a temperature well below their melting point or produce a high temperature physicochemical reaction with the asphalt. This greatly affects the hot mix asphalt.

Other inorganic mineral fibers

1. good surface affinity with asphalt, can enhance the thickness of asphalt oil film and improve the anti-oxidation and aging ability of asphalt pavement.
2. High strength and elastic modulus, an excellent reinforcing fiber, can greatly improve the tensile strength and toughness of asphalt mixture.
3. Not absorbing water and not afraid of moisture, easy to transport and storage, helpful to the combination of asphalt film and aggregate, suppress road water damage
4. Excellent high temperature resistance, suitable for hot mix asphalt.

1. The biggest defect of mineral fiber is its brittleness. Since mineral fiber is produced by spraying and blowing, there are many crystalline particles in the fiber. In the process of mixing and paving, mineral short fiber is easy to break again, making fiber aspect ratio change and difficult to control.
2. Due to the complexity of the production process of mineral fiber, there are few production enterprises in China, the production efficiency is low, the production capacity is far from meeting the market demand, the price is high, and the application is limited.

basalt fiber

1. It is an inorganic mineral fiber with all fiber advantages
2. different from other mineral fibers, good toughness and softness, high production output and efficiency, can fully meet market demand.
3. good homogeneity, higher mechanical properties and better reinforcement effect

1. Because it is still in the market development stage at present, there is no mass production yet, so compared with other non-mineral fiber, no obvious price advantage.
2.Strict requirements on the composition of raw material - ore.