HL—Introduction of polyester fiber for road use:

Polyester fiber is made of modified polyester chips through blending, spinning, anti-aging, surface lipophilic treatment, and chopped cutting. Polyester fiber has excellent properties such as high strength modulus, good heat resistance and thermal stability, and good compatibility with asphalt. When the fiber addition is 0.4% of the mixture, one cubic meter of asphalt mixture will contain hundreds of millions of short fibers, which can improve the tensile, shear, compression, and impact strength of asphalt concrete and greatly improve The performance and quality of asphalt pavement make asphalt concrete have the advantages of high temperature stability, low temperature crack resistance, fatigue resistance, water stability, strong skid resistance, and low driving noise.

Physical properties of road polyester fiber

MaterialRelative densityBurning point

polyester resin	diameter	16~24um
1.36~1.40g/cm3	Breaking strength	≥542Mpa
Melting point	About 259°C	Elongation at break	30%~40%
About 554℃	Fiber specification (length)	5、8、10mm

Action mechanism of road polyester fiber

　　 1. Reinforcing ribs. The road polyester fiber exists in the mixture as a three-dimensional dispersed phase, distributed in random directions, overlaps each other, and forms a network entanglement constraint on the mixture, thereby overcoming the relative slippage and cracks between particles.

　　2. Road polyester fiber has a dispersing effect. If there is no fiber, a large amount of bituminous mineral powder is likely to become micelles, which cannot be evenly dispersed between the aggregates, resulting in the common oil spots on the road. Fiber can disperse micelles.

　　3. Road polyester fiber has the function of adsorbing asphalt. Due to its large specific surface area, the fiber material is easy to absorb the oil in the asphalt, so that the viscosity of the asphalt increases and the adhesion is stronger, which makes the thickness of the structural asphalt membrane increase. According to analysis, the asphalt membrane is 65% thicker than the traditional mixture~ 113%.

　　4. Road polyester fiber has a stabilizing effect. The addition of fiber obviously prevents the flow of asphalt and keeps the asphalt in a relatively stable state. The fiber has a strong ability to sustain asphalt. Generally, it must be at a high temperature above 130°C before the excess asphalt drips on the surface of the fiber. When asphalt expands under high temperature in summer, the voids inside the fiber will become a buffer zone, which will not become free and free asphalt and oily, which will stabilize the mixture at high temperature.

　　5. Road-use polyester fiber has a viscosity-increasing effect and improves adhesion. Increase the adhesion of asphalt and mineral materials, and improve the adhesion between aggregates through the adhesion of oil film.

　　6. Road polyester fiber has the function of toughening and cracking resistance. The fiber has high modulus value and strong extensional deformation ability, and has effective stress distribution and crack resistance function, which can prevent low-temperature embrittlement caused by excessive asphalt viscosity in traditional mixtures.

　　Road polyester fiber has main functions

　　●Improve the quality of asphalt concrete pavement and prolong the service life of the pavement;

　　●Prevent reflection cracks and temperature cracks on asphalt concrete pavement;

　　●Prevent rutting and road channelization of asphalt concrete pavement;

　　●Prevent potholes on the asphalt pavement caused by strong pressure and prevent water damage.

　　Road polyester fiber has the main purpose

　　●It is not only suitable for asphalt mastic macadam mixture (SMA), but also for densely graded asphalt concrete (AC) and asphalt macadam (AM) structures;

　　●Dense-graded asphalt concrete pavement surface;

　　●The thin asphalt concrete surface layer of the old asphalt concrete pavement (white + black);

　　●Asphalt concrete surface layer (steel + black) on steel structure bridge;

　　●Cold patch, grouting, curb;

　　●The airport runway and apron are strengthened;

　　●Used for bridge deck paving. HL—Introduction of road polyester fiber:

Polyester fiber is made of modified polyester chips through blending, spinning, anti-aging, surface lipophilic treatment, and chopped cutting. Polyester fiber has excellent properties such as high strength modulus, good heat resistance and thermal stability, and good compatibility with asphalt. When the fiber addition is 0.4% of the mixture, one cubic meter of asphalt mixture will contain hundreds of millions of short fibers, which can improve the tensile, shear, compression, and impact strength of asphalt concrete and greatly improve The performance and quality of asphalt pavement make asphalt concrete have the advantages of high temperature stability, low temperature crack resistance, fatigue resistance, water stability, strong skid resistance, and low driving noise.

Physical properties of road polyester fiber

Material 1 ester resin diameter 16~24um

Relative density 1.36~1.40g/cm3 breaking strength ≥542Mpa

Melting point is about 259℃, elongation at break 30%~40%

Ignition point is about 554℃, fiber specifications (length) 5, 8, 10mm

Action mechanism of road polyester fiber

1. Reinforcing ribs. The road polyester fiber exists in the mixture as a three-dimensional dispersed phase, distributed in random directions, overlaps each other, and forms a network entanglement constraint on the mixture, thereby overcoming the relative slippage and cracks between particles.

2. The road polyester fiber has a dispersing effect. If there is no fiber, a large amount of bituminous mineral powder is likely to become micelles, which cannot be evenly dispersed between the aggregates, resulting in the common oil spots on the road. Fiber can disperse micelles.

3. The road polyester fiber has the function of adsorbing asphalt. Due to its large specific surface area, the fiber material is easy to absorb the oil in the asphalt, so that the viscosity of the asphalt increases and the adhesion is stronger, which makes the thickness of the structural asphalt membrane increase. According to analysis, the asphalt membrane is 65% thicker than the traditional mixture~ 113%.

4. Road polyester fiber has a stabilizing effect. The addition of fiber obviously prevents the flow of asphalt and keeps the asphalt in a relatively stable state. The fiber has a strong ability to sustain asphalt. Generally, it must be at a high temperature above 130°C before the excess asphalt drips on the surface of the fiber. When asphalt expands under high temperature in summer, the voids inside the fiber will become a buffer zone, which will not become free and free asphalt and oily, which will stabilize the mixture at high temperature.

5. The road polyester fiber has the effect of increasing viscosity and improving the adhesion. Increase the adhesion of asphalt and mineral materials, and improve the adhesion between aggregates through the adhesion of oil film.

6. The road polyester fiber has the function of toughening and cracking resistance. The fiber has high modulus value and strong extensional deformation ability, and has effective stress distribution and crack resistance function, which can prevent low-temperature embrittlement caused by excessive asphalt viscosity in traditional mixtures.

Road polyester fiber has main functions

●Improve the quality of asphalt concrete pavement and prolong the service life of the pavement;

●Prevent reflection cracks and temperature cracks on asphalt concrete pavement;

●Prevent rutting and channelization of asphalt concrete pavement;

●Prevent potholes on the asphalt pavement caused by strong pressure and prevent water damage.

Road polyester fiber has main uses

●It is not only suitable for asphalt mastic macadam mixture (SMA), but also for densely graded asphalt concrete (AC) and asphalt macadam (AM) structures;

●Dense graded asphalt concrete pavement surface;

●Thin asphalt concrete surface (white + black) of old asphalt concrete pavement;

●Steel structure bridge with asphalt concrete surface (steel + black);

●Cold patching, grouting, roadside;

●Enhanced airport runway and apron;

●Used for bridge deck paving.