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High fracture toughness and elasticity modified asphalt, preparing method and application thereof

A technology of modified asphalt, toughness and high elasticity, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor compatibility of asphalt, and achieve the effect of high softening point and high bending deformation capacity

Active Publication Date: 2015-10-21
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modifier itself has poor compatibility with asphalt, so how to form a stable system and give full play to the role of the modifier is the key issue.

Method used

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  • High fracture toughness and elasticity modified asphalt, preparing method and application thereof
  • High fracture toughness and elasticity modified asphalt, preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 3 parts of styrene and acrylic acid monomer mixture to the solvent, add 0.2 parts of azobisisobutyronitrile, raise the temperature to 50°C, stir for 10 minutes, and heat up to 80°C for 1 hour after the monomers are completely dissolved. The reactant was cooled to room temperature, filtered off, and dried under vacuum at 60°C to obtain a compatibilizer.

[0039] Heat 70 parts of base bitumen with a value of (saturation + asphaltenes) / (aromatic + gum) 33 and a penetration of 57 1 / 10mm at 25°C to 130°C, and add 5 parts of tall oil and naphthenic oil Stir the mixture at 150°C until uniform, then add 10 parts of SBS, 2 parts of PE, shear at 200°C at a shear speed of 3500 rpm for 60 min, add 2 parts of prepared compatibilizer, 0.1 part of ring Ethylene oxide-butylene oxide copolymer, and continue to shear at 3500 rpm at 200 ° C for 20 min, add 0.3 parts of sulfur and 1 part of vinyl bisstearamide, and cut at 2500 rpm at 180 ° C Continue to shear for 30 minutes, and final...

Embodiment 2

[0041] Add 5 parts of styrene, butadiene and acrylic acid monomer mixture to the solvent, add 0.5 part of benzoyl peroxide, raise the temperature to 60°C, stir for 15 minutes, and heat up to 85°C for 1.5 hours after the monomers are completely dissolved. The reactant was cooled to room temperature, filtered off, and dried under vacuum at 55°C to obtain a compatibilizer.

[0042] Heat 120 parts of base asphalt with a value of 26 (saturated content + asphaltene) / (aromatic content + gum) and a penetration of 62 1 / 10 mm at 25 °C to 150 °C, add 15 parts of rubber oil and stir at 150 °C until uniform, then add 20 parts of SIS, 5 parts of PB, shear at 180°C at a shear speed of 6000 rpm for 100 min, add 4 parts of prepared compatibilizer, 0.05 parts of sodium dodecylsulfonate , and continue shearing at 5500 rpm at 180 ° C for 30 min, add 0.5 parts of sodium sulfide and 1.5 parts of vinyl bisstearamide, and continue shearing at 4000 rpm at 160 ° C for 60 min, and finally at 150 ° C Th...

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Abstract

Provided is high fracture toughness and elasticity modified asphalt. The needle penetration of the high fracture toughness and elasticity modified asphalt is larger than 301 / 10 mm, the ductility is larger than 40 cm under the temperature of 5 DEG C, and the softening point is larger than 90 DEG C. The high fracture toughness and elasticity modified asphalt comprises, by mass, 70%-85% of matrix asphalt, 5%-20% of thermoplastic elastomer, 2%-5% of reinforcing agent, 1%-5% of compatilizer, 5%-20% of a softening agent, 0.01%-0.1% of a dispersing agent, 0.2%-0.5% of a cross-linking agent and 0.5%-2% of viscosity reducer. According to the modified asphalt, the mixing amount of a modifying agent is high, the stability is good, the high and low temperature performances are good, using for construction is convenient, curl pavements and other functional pavements can be prepared, and the high fracture toughness and elasticity modified asphalt is used for paving of roads and bridge faces.

Description

technical field [0001] The invention relates to a high-viscosity and high-elasticity modified asphalt. [0002] The present invention also relates to the preparation method of the above-mentioned modified asphalt. [0003] The present invention also relates to the use of the above-mentioned modified bitumen. Background technique [0004] The factory prefabrication-site installation method is an important development trend of civil structure construction technology. In the field of pavement engineering, block pavement technology is more widely used, such as the use of prefabricated cement concrete blocks, strip stones, block stones and bricks to pave the pavement. [0005] Due to the difficulty of prefabricated on-site installation technology of asphalt pavement, there are few related researches at home and abroad. The Netherlands has put forward a new idea in the field of modular asphalt pavement pavement technology, that is, prefabricated flexible and rollable asphalt pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L91/00C08L23/06C08L51/00C08L47/00C08K5/42C08K3/06C08K3/30
Inventor 曹东伟张艳君张海燕
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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