The main role of polyester

Release time:

2021/11/12

Improve high-temperature stability, improve high-temperature stability Due to the three-dimensional distribution of polyester fiber monofilament, it has strong adsorption with asphalt and does not entangle, and can absorb too much free asphalt, so that the viscosity and viscosity of asphalt At the same time, due to the crisscross reinforcement and bridging effect, the flow performance of asphalt is reduced, the lateral displacement or flow of aggregate is limited, the high temperature stability is effectively improved, and the stability of fiber asphalt concrete is improved. Great improvement.

1. Improve high temperature stability, increase high temperature stability. Due to the three-dimensional distribution of polyester fiber monofilament, it has a strong adsorption effect with asphalt and does not wind. It can absorb too much free asphalt and increase the viscosity of asphalt. At the same time, due to the criss-cross reinforcement and bridge action, the flow performance of asphalt is reduced, the lateral displacement or flow of aggregate is limited, and the high temperature stability is effectively improved, and the stability of fiber asphalt concrete is greatly improved.
2. Improve the low temperature cracking resistance. The adsorption effect of fiber on asphalt leads to increased asphalt content and higher asphalt content in asphalt concrete, so that the fiber asphalt mixture can maintain a flexible and high tensile strength at a low temperature of -40℃, effectively resist the contraction stress, and enhance the low temperature cracking resistance of the mixture; Reduce the generation of temperature shrinkage cracks and prevent the development of reflection cracks.
3. Improve fatigue resistance Asphalt pavement withstands multiple wheel loads under the action of external temperature environment. When the load is repeated more than a certain number of times, the stress generated by the pavement under the load will exceed the structural resistance after the strength is reduced. The pavement cracks, resulting in fatigue fracture damage. After adding polyester fiber, the fiber monofilament in the mixture is evenly distributed, the stiffness modulus of asphalt concrete is increased, and the fatigue resistance of asphalt concrete is improved.
4. The water stability of asphalt pavement refers to the repeated action of traffic load and temperature on the expansion and contraction of asphalt pavement in the presence of water. The addition of polyester fiber thickens the asphalt film, reduces the strength of waterdrive asphalt, and reduces the amount of water penetrating into asphalt concrete. In addition, the adsorption of fibers increases the viscosity of bitumen, thus improving the properties of bitumen and asphalt. The bonding force of aggregate enhances the ability of the interfacial film formed by asphalt and aggregate to resist water stripping, thus improving the water stability of asphalt mixture.

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The performance and function of polyester

Synthetic steps of polyester

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The performance and function of polyester

Synthetic steps of polyester

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