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Novel rubber powder composite modified asphalt and preparation method thereof

A technology of compound modified asphalt and rubber powder, applied in building components, building insulation materials, buildings, etc., can solve problems such as poor storage stability

Inactive Publication Date: 2020-10-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of rubber powder composite modified asphalt and its preparation method, which solves the defect of poor storage stability of rubber powder asphalt in the prior art

Method used

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  • Novel rubber powder composite modified asphalt and preparation method thereof
  • Novel rubber powder composite modified asphalt and preparation method thereof

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preparation example Construction

[0028] A kind of preparation method of novel rubber powder composite modified asphalt provided by the invention comprises the following steps:

[0029] Step 1, heating the base asphalt in an oven at 140°C to a molten state to obtain molten base asphalt; take it out for later use;

[0030] Step 2, adding waste tire rubber powder to the molten matrix asphalt obtained in step 1 at a temperature of 180-190°C, performing high-speed shearing, the shearing rate is 4500-5500r / min, and the shearing time is 45-60min. After the cutting is completed, it will be a thick mixture, and then fully swell for 20-30 minutes; wherein, the mass ratio of molten matrix asphalt and waste tire rubber powder is (80-86): (12-18);

[0031] Step 3, using an ultrasonic disperser, adding the nanomaterial modifier to the thick mixture obtained in step 2 to disperse for 20-30min to obtain a dispersed mixture; wherein, the amount of the nanomaterial modifier is the same as that added in step 2 The mass ratio o...

Embodiment 1

[0039] Step 1, heat the base asphalt in an oven at 140°C to a molten state, and take it out for later use;

[0040] Step 2: Add waste tire rubber powder to the molten matrix asphalt obtained in Step 1 at a temperature of 190°C, perform high-speed shearing, the shearing rate is 4500r / min, the shearing time is 45min, and fully swell for 20min after shearing ; Wherein, the mass ratio of molten matrix asphalt and waste tire rubber powder is 80:15;

[0041] Step 3, using an ultrasonic disperser, adding the nanomaterial modifier to the thick mixture obtained in step 2 and dispersing for 20 minutes to obtain a dispersed mixture; wherein, the amount of the nanomaterial modifier and the waste added in step 2 The mass ratio of rubber powder is 5:15;

[0042] Step 4: Heat the dispersion mixture to 160°C in an electric furnace, shear the asphalt at a high speed for 30 minutes, and use a shear rate of 3000r / min to obtain a new type of rubber powder composite modified asphalt.

Embodiment 2

[0044] Step 1, heat the base asphalt in an oven at 140°C to a molten state, and take it out for later use;

[0045] Step 2: Add waste tire rubber powder to the molten matrix asphalt obtained in Step 1 at a temperature of 190°C, perform high-speed shearing, the shearing rate is 5500r / min, the shearing time is 60min, and fully swell for 30min after shearing ; Wherein, the mass ratio of molten matrix asphalt and waste tire rubber powder is 86:12;

[0046] Step 3, using an ultrasonic disperser, adding the nanomaterial modifier to the thick mixture obtained in step 2 to disperse for 30 minutes to obtain a dispersed mixture; wherein, the amount of the nanomaterial modifier and the waste added in step 2 The mass ratio of rubber powder is 2:12;

[0047] Step 4: Heat the dispersion mixture to 163°C in an electric furnace, shear the asphalt at a high speed for 45 minutes, and use a shear rate of 4000r / min to obtain a new type of rubber powder composite modified asphalt.

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Abstract

The invention provides novel rubber powder composite modified asphalt and a preparation method thereof. The novel rubber powder composite modified asphalt is prepared from the following components bymass percentage: 12%-18% of waste tire rubber powder, 2%-5% of nano-material modifier and 80%-86% of matrix asphalt; by compounding the nano material with the rubber powder modified asphalt, the structural characteristics of the raw materials can be changed on the nanoscale, so that the macroscopic properties of the material are greatly optimized, the high-temperature rutting resistance of the rubber powder modified asphalt can be improved, and the storage stability of the rubber powder modified asphalt is improved.

Description

technical field [0001] The invention relates to the field of asphalt preparation, in particular to a novel rubber powder composite modified asphalt and a preparation method thereof. Background technique [0002] Social development has brought serious environmental problems, resulting in a lot of waste tires. The recycling of old tire materials can help solve the environmental problems caused by waste tires, and has become the research focus of polymer modified asphalt. Adding waste rubber tires to asphalt can significantly improve its road performance and has good environmental benefits. [0003] In recent years, with the continuous increase of traffic volume and traffic load, the demand for high-strength and high-durability road materials has become increasingly urgent. However, most of the rubber powder modified asphalt currently used has the defect of poor storage stability, which leads to its failure to achieve the expected application effect in practical applications....

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L19/00C08K3/04C08K3/22
CPCC08K2003/2241C08K2003/2275C08K2201/011C08L95/00C08L2201/08C08L19/003C08K3/041C08K3/22
Inventor 傅珍王蒙蒙孙启宇马峰代佳胜常晓蓉李晨
Owner CHANGAN UNIV
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