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A kind of polyester fiber reinforced asphalt mixture and preparation method thereof

A technology of asphalt mixture and polyester fiber, which is applied in the direction of single-component copolyester rayon, etc., can solve the problem of unsatisfactory dispersion effect, lower bending stiffness modulus index of asphalt mixture, and lower low temperature crack resistance, etc. problems, to achieve the effect of improving thermal storage stability, increasing integrity and rigidity, and enhancing high temperature anti-rutting performance

Active Publication Date: 2022-03-18
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the excessive incorporation of polyester fibers causes the fibers to agglomerate, and the dispersion effect is not ideal, which leads to a decrease in the flexural stiffness modulus and low-temperature crack resistance of the asphalt mixture.

Method used

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  • A kind of polyester fiber reinforced asphalt mixture and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of preparation method of polyester fiber reinforced asphalt mixture, concrete steps are as follows:

[0050] (1) preparation of modified polyester staple fiber;

[0051] (1.1) Esterification reaction;

[0052] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.04, add catalyst (antimony trioxide), matting agent (titanium dioxide) and stabilizer (triphosphate triphosphate) phenyl ester) mixed evenly, and then carry out esterification reaction in nitrogen atmosphere, wherein, the addition amount of catalyst, matting agent and stabilizer is respectively 0.01wt%, 0.21wt% and 0.02wt% of the addition amount of terephthalic acid, ester The temperature of the reaction is 250°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 95% of the theoretical value;

[0053] (1.2) polycondensation reaction;

[0054] After the es...

Embodiment 2

[0074] A kind of preparation method of polyester fiber reinforced asphalt mixture, concrete steps are as follows:

[0075] (1) preparation of modified polyester staple fiber;

[0076] (1.1) Esterification reaction;

[0077] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.05, add catalyst (antimony trioxide), matting agent (titanium dioxide) and stabilizer (triphosphate triphosphate) phenyl ester) mixed uniformly, and then carry out esterification reaction in nitrogen atmosphere, wherein, the addition amount of catalyst, matting agent and stabilizer is respectively 0.03wt%, 0.2wt% and 0.02wt% of terephthalic acid addition amount, ester The temperature of the reaction is 252°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 96% of the theoretical value;

[0078] (1.2) polycondensation reaction;

[0079] After the esterif...

Embodiment 3

[0099] A kind of preparation method of polyester fiber reinforced asphalt mixture, concrete steps are as follows:

[0100] (1) preparation of modified polyester staple fiber;

[0101] (1.1) Esterification reaction;

[0102] Prepare a slurry of terephthalic acid, ethylene glycol and 2,5-pyridinedicarboxylic acid with a molar ratio of 1:1.3:0.06, add catalyst (antimony glycol), matting agent (titanium dioxide) and stabilizer (triphosphate methyl ester), and then carry out esterification reaction in nitrogen atmosphere, wherein, the addition amount of catalyst, matting agent and stabilizer is respectively 0.02wt%, 0.22wt% and 0.02wt% of the addition amount of terephthalic acid, ester The temperature of the reaction is 254°C, and the termination condition of the esterification reaction is: the distilled amount of water in the esterification reaction reaches 98% of the theoretical value;

[0103] (1.2) polycondensation reaction;

[0104] After the esterification reaction is over...

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Abstract

A polyester fiber-reinforced asphalt mixture and a preparation method thereof. The polyester fiber-reinforced asphalt mixture is obtained by mixing modified polyester short fibers, asphalt and aggregates; the asphalt ratio of the polyester fiber-reinforced asphalt mixture is 4.68-4.92% , the mass percentage of modified polyester staple fiber in polyester fiber reinforced asphalt mixture is 0.1-0.3%; the polyester segment of modified polyester staple fiber includes terephthalic acid segment, ethylene glycol segment and 2 , 5-pyridinedicarboxylic acid segment; the molar ratio of terephthalic acid segment and 2,5-pyridinedicarboxylic acid segment is 1:0.04~0.06; 2,5-pyridine in the modified polyester fiber of the present invention The dicarboxylic acid segment coordinates with iron, calcium, magnesium, nickel and other metal ions in asphalt, which increases the bonding force between fibers and asphalt molecules, forms physical cross-linking points, and enhances the high-temperature anti-rutting performance of asphalt pavement. At the same time, it increases the integrity and rigidity of the asphalt pavement, thereby improving the thermal storage stability, aging resistance and low temperature crack resistance of the asphalt.

Description

technical field [0001] The invention belongs to the field of road transportation, and relates to a polyester fiber reinforced asphalt mixture and a preparation method thereof. Background technique [0002] The high symmetry of the molecular chain structure of polyester and the rigidity of the benzene ring make the product have good mechanical processing performance, chemical corrosion resistance and anti-microbial erosion performance, etc., and because of the advantages of relatively low price and easy recycling, it is widely used It is used in various fields such as fibers, films, and plastic products. [0003] With the rapid growth of the national economy and the general improvement of people's living standards, the requirements for the speed, safety, comfort, and economy of transportation are also getting higher and higher. However, road transport, as the most direct and convenient mode of transport, is still the most chosen mode of travel and is still facing huge traffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C08G63/685C08G63/78D01F6/84
CPCC04B26/26C08G63/6856C08G63/78D01F6/84C04B2111/0075C04B2201/50C04B16/0683C04B14/28
Inventor 王丽丽王雪孙晓华张大伟赵艳丽张元华
Owner JIANGSU HENGLI CHEM FIBER
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