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Composite modified asphalt and preparation method thereof

A technology of composite modified asphalt and matrix asphalt, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problem that the viscoelasticity and flexibility of modified asphalt cannot meet the corresponding requirements of ultra-thin wear layers, and achieve good cost and Environmental benefits, avoid low temperature easy cracking, and simple preparation process

Active Publication Date: 2021-07-20
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscoelasticity and flexibility of the existing modified asphalt can no longer meet the corresponding requirements of the ultra-thin wear layer. There is an urgent need for a modified asphalt with the advantages of high viscosity, good toughness, aging resistance and storage stability.

Method used

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  • Composite modified asphalt and preparation method thereof
  • Composite modified asphalt and preparation method thereof
  • Composite modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of composite modified asphalt, its preparation method comprises the steps:

[0039] 1) Take 90 parts of base asphalt and heat it to 140°C to melt flow state, add 6 parts of polyisoprene-based modifier and 2 parts of compatibilizer cracked distillate oil to base asphalt, and manually stir for 30 minutes at 150°C , and then add 4 parts of SBS to it and place it in a heat preservation device with a constant temperature of 180°C for high-speed shearing, the shearing machine speed is 7000r / min, and the shearing time is 80min to obtain the mixture A;

[0040] 2) Add 1 part of stabilizer (sulfur and bis-tert-butylperoxycumene mixed in a mass ratio of 2:3) to mixture A, and place it at a constant temperature of 180°C for shearing, and the speed of the shearing machine is 3000r / min, the shearing time is 30min to obtain mixture B;

[0041] 3) The obtained mixture B was placed in a stirring pile with a constant temperature of 160° C. for stirring, the rotational speed of ...

Embodiment 2

[0043] A kind of composite modified asphalt, its preparation method comprises the steps:

[0044] 1) Take 85 parts of base asphalt and heat it to 140°C to melt flow state, add 7 parts of polyisoprene-based modifier and 3 parts of compatibilizer cracked distillate oil into the base asphalt, and manually stir for 30 minutes at 150°C , and then add 4 parts of SBS to it and place it in a heat preservation device with a constant temperature of 190°C for high-speed shearing, the shearing machine speed is 8000r / min, and the shearing time is 90min to obtain the mixture A;

[0045] 2) Add 2 parts of stabilizer (sulfur and bis-tert-butylperoxycumene mixed in a mass ratio of 2:3) to mixture A, and place it at a constant temperature of 180°C for shearing, and the speed of the shearing machine is 2000r / min, the shearing time is 45min to obtain mixture B;

[0046] 3) Put the obtained mixture B in a stirring pile with a constant temperature of 170° C. for stirring, control the speed of the...

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Abstract

The invention discloses composite modified asphalt which comprises the following components in parts by weight: 85-95 parts of matrix asphalt, 4-6 parts of a thermoplastic elastomer, 5-8 parts of a modifier, 2-4 parts of a compatilizer and 1-2 parts of a stabilizer, wherein the thermoplastic elastomer is a styrene-butadiene-styrene block copolymer, and the modifier is a polyisoprene copolymer. The dynamic viscosity of the obtained composite modified asphalt at 60 DEG C can reach 7 million Pa.s, the ductility of the composite modified asphalt at the low temperature of 5 DEG C is 35 cm or above, and the composite modified asphalt has good viscosity and toughness; meanwhile, the high-temperature rotary viscosity is low, the mixing difficulty and the construction difficulty are reduced, and the composite modified asphalt is suitable for application and popularization.

Description

technical field [0001] The invention belongs to the technical field of road building materials, and in particular relates to a composite modified asphalt and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and society and the continuous improvement of people's living standards, heavy traffic and heavy loads have accelerated the damage of road surfaces. As time goes by, most road surfaces will gradually enter the maintenance stage. A suitable maintenance method is called a hot spot in the industry at present. At present, the commonly used normal temperature maintenance technologies such as micro-surfacing and fog sealing layer have disadvantages such as poor durability and high driving noise. Compared with the traditional cold-mix preventive maintenance technology, the hot-mix and hot-lay ultra-thin wear layer technology has the advantages of good road performance, long service life, low driving noise, anti-skid a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L51/04C08K3/06C08K5/14
CPCC08L95/00C08L2207/04C08L2201/08C08L53/02C08L51/04C08K3/06C08K5/14
Inventor 王洪伟卢吉黄绍龙毛威江漩蔡祥丁帆周锐黄荣荣别璐
Owner WUHAN MUNICIPAL CONSTR GROUP
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