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A high viscoelastic joint filling material for acid aggregate asphalt pavement and preparation method thereof

A technology for asphalt pavement and joint filling materials, which is applied in the direction of asphalt material adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., and can solve the problems of poor expansion and contraction performance, re-cracking, and extrusion resistance of joint filling materials Poor pressure performance and other problems, to achieve the effect of preventing re-cracking, expanding the scope of use, and reducing costs

Active Publication Date: 2019-08-20
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material can form an elastic body with a certain strength, which solves the problems of poor extrusion resistance of the filling material when the cracks are narrowed at high temperature and poor expansion and contraction performance of the filling material when the cracks are widened at low temperature; the polyhydroxy organic compounds in this material It can improve the bonding force between the filling material and the crack wall, and solve the problem of re-cracking caused by poor adhesion performance when cracks widen at low temperature

Method used

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  • A high viscoelastic joint filling material for acid aggregate asphalt pavement and preparation method thereof
  • A high viscoelastic joint filling material for acid aggregate asphalt pavement and preparation method thereof
  • A high viscoelastic joint filling material for acid aggregate asphalt pavement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Select 100 parts of heavy traffic road asphalt AH-50 and heat it to a fluid state at 100°C, add 70 parts of waste rubber powder (4 mesh), 5 parts of hydroxyl-terminated polybutadiene rubber compounds (molecular weight 3300 , functionality 2.2), 0.5 parts of elasticity modifier (4,4`-isopropylidene bisphenol) and 0.5 parts of rigidity modifier (1,5-naphthalene diisocyanate); after mixing, stir for 30 minutes and heat up to 145 under the condition of ℃ for 30min; under the condition of lowering the temperature to 100℃ and then stirring for 30min, the preparation is completed.

Embodiment 2

[0028] Select 100 parts of heavy traffic road asphalt AH-50 and heat it to a fluid state at 110°C, add 40 parts of waste rubber powder (4 mesh), 15 parts of hydroxyl-terminated polybutadiene rubber compounds (molecular weight 4400 , functionality 2.2) and 1.5 parts of elasticity modifier (1,4-butanediol) and 0.5 parts of rigidity modifier (1,4-cyclohexyl diisocyanate); after mixing, stir for 25 minutes and heat up to 145°C Shearing for 25 minutes; cooling down to 100°C and stirring for another 30 minutes to complete the preparation.

Embodiment 3

[0030] 100 parts of heavy traffic road asphalt AH-70 was selected and heated to a fluid state at 100°C, and 50 parts of waste rubber powder (8 mesh), 10 parts of hydroxyl-terminated polybutadiene rubber compounds (molecular weight 3600 , functionality 2.4) and 0.5 parts of elasticity modifier (1,4-butanediol) and 1.0 parts of rigidity modifier (1,4-cyclohexyl diisocyanate); after mixing, stir for 20 minutes and heat up to 145°C Shear for 20 minutes; cool down to 100°C and stir for another 30 minutes to complete the preparation.

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Abstract

The invention discloses a highly viscoelastic joint filling material for acid aggregate asphalt pavement, which is made of heavy traffic asphalt, polyhydroxy organic matter, elasticity regulator, rigidity regulator and waste rubber powder. This kind of joint filling material is designed for acid aggregate asphalt pavement, and the adhesion to acid aggregate in asphalt pavement can be improved by adding polyhydroxy organic matter; polyhydroxy organic matter can also be formed by interacting with waste rubber powder and elasticity regulator elastomer. This high-viscoelastic joint filling material for acid aggregate asphalt pavement simultaneously improves two major defects of commonly used joint filling materials at the same time, and is a road joint filling material with broad application prospects.

Description

technical field [0001] The invention belongs to the field of asphalt pavement maintenance, and in particular relates to a highly viscoelastic joint filling material for acid aggregate asphalt pavement and a preparation method thereof. Background technique [0002] With the development of our country's economy, the transportation industry has made rapid progress. The total mileage of highway construction and the mileage of high-grade highway construction have reached the first and second positions in the world respectively. 75% of the roads built in our country belong to asphalt pavement, which is higher in high-grade highways, because asphalt pavement has good shock absorption effect, comfortable driving, low noise, strong adaptability to roadbed and fast repair speed, etc. advantage. Asphalt pavement has both advantages and disadvantages. The main reason is that the asphalt used as a bonding material in asphalt pavement is an organic substance, which is temperature sensiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J195/00C09J11/08C09J11/06
Inventor 孙华东丁永玲张爱勤王保群王彦敏王德明庄传义叶亚丽
Owner SHANDONG JIAOTONG UNIV
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