A kind of nano-modified emulsified asphalt and its preparation and use method

A technology of emulsified asphalt and nano-modification, applied in building components, building insulation materials, buildings, etc., can solve the problem of affecting the stability, road performance and durability of recycled asphalt mixture, hindering the application and development of domestic cold recycling technology, Problems such as poor low temperature crack resistance and fatigue resistance, achieve significant social and economic benefits, increase compatibility and adhesion, and improve low temperature crack resistance and fatigue resistance.

Active Publication Date: 2021-03-30
重庆路维康交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many similar modified emulsified asphalt materials, but compared with foreign emulsified asphalt materials and technologies, my country's development is relatively lagging behind. The main reason is that the low-temperature crack resistance and fatigue resistance of emulsified asphalt mixed with waste RAP are found to be poor after testing. , and when more waste RAP is added, its regeneration ability is poor, which directly affects the stability, road performance and durability of recycled asphalt mixture
Due to the above reasons, the high-quality emulsified asphalt used in high-efficiency cold recycling technology is less, which is far from the comprehensive road performance of foreign advanced emulsified asphalt materials, which seriously hinders the application and development of domestic cold recycling technology.

Method used

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  • A kind of nano-modified emulsified asphalt and its preparation and use method
  • A kind of nano-modified emulsified asphalt and its preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of nano-modified emulsified asphalt, comprising the steps of:

[0029] Step 1: Dehydration of waste engine oil and screening of heavy metal impurities, and desulfurization of desulfurized rubber powder at a temperature of 200°C and a pressure of 2.5Mpa;

[0030] Step 2: Under the condition of 170°C, 7kg of desulfurized rubber powder, 32kg of 70# base asphalt, 3kg of rubber and plastic stabilizer, 13kg of waste engine oil and 3kg of graphene are sheared at high speed into soft rubber and plastic modified asphalt;

[0031] Step 3: Under the condition of 60°C, 5kg of SBR cationic styrene-butadiene latex, 34kg of water, and 3kg of emulsifier were quickly stirred evenly to obtain a mixed solution;

[0032] Step 4: Add the soft rubber-plastic modified asphalt and the mixed solution to the colloid mill at the same time, shear at a high speed at 90°C and mix thoroughly; the shear speed of the colloid mill is maintained at 1900r / min, and the shear time is 10...

Embodiment 2

[0039] The difference from Example 1 is that the proportioning of the nano-modified emulsified asphalt is different. In a preparation method of nano-modified emulsified asphalt, in step 1, 5 kg of desulfurized rubber powder, 33 kg of 70# base asphalt, rubber 3kg of plastic stabilizer, 13kg of waste engine oil and 1kg of graphene were sheared at high speed into soft rubber-plastic modified asphalt; in step 3, 6kg of SBR cationic styrene-butadiene latex, 35kg of water, and 4kg of emulsifier were quickly stirred evenly to obtain a mixed solution.

Embodiment 3

[0041] The difference from Example 1 is that the proportioning of the nano-modified emulsified asphalt is different. In a preparation method of nano-modified emulsified asphalt, in step 1, 10 kg of desulfurized rubber powder, 30 kg of 70# base asphalt, rubber 3kg of plastic stabilizer, 10kg of waste engine oil and 5kg of graphene were sheared at high speed into soft rubber-plastic modified asphalt; in step 3, 5kg of SBR cationic styrene-butadiene latex, 34kg of water, and 3kg of emulsifier were quickly stirred evenly to obtain a mixed solution.

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Abstract

The invention relates to asphalt and a preparation and using method thereof, in particular to nano-modified emulsified asphalt as well as a preparation and using method thereof. The nano-modified emulsified asphalt comprises the following raw materials: graphene, used oil, desulfurized rubber powder, matrix asphalt, a rubber-plastic stabilizer, SBR cationic styrene-butadiene latex, an emulsifier and water. The preparation method of the nano-modified emulsified asphalt comprises the following steps: 1, dewatering the used oil and removing heavy metals; 2, shearing into soft rubber-plastic modified asphalt; 3, obtaining a mixed solution; 4, simultaneously adding the soft rubber-plastic modified asphalt and the mixed solution into a colloid mill, shearing and mixing, thereby obtaining the nano-modified emulsified asphalt. The using method of the nano-modified emulsified asphalt comprises the following steps: 1, weighing the nano-modified emulsified asphalt for later use; 2, preparing a mixture A; 3, preparing a mixture B; 4, adding the nano-modified emulsified asphalt into the mixture B, and stirring to prepare a recycled asphalt mixture.

Description

technical field [0001] The invention relates to asphalt and its preparation and use method, in particular to a nano-modified emulsified asphalt and its preparation and use method. Background technique [0002] At present, asphalt pavement recycling technologies at home and abroad are divided into four categories, namely, plant-mixed hot regeneration, on-site hot regeneration, plant-mixed cold recycling, and on-site cold recycling. At present, the most widely used technology is the plant-mixed heat regeneration technology, which is relatively mature and stable in quality, but consumes too much energy. New asphalt, new aggregates and waste RAP need to be heated to a very high temperature during the mixing process, which will cause environmental pollution. Therefore, the cold recycling technology (cold recycling of emulsified asphalt and cold recycling of foamed asphalt) has certain advantages. It can not only realize the recycling of waste RAP, but also achieve normal temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L17/00C08L9/08C08L91/00C08K3/04
CPCC08L95/00C08L2205/035C08L17/00C08L9/08C08L91/00C08K3/042
Inventor 张颖李培国崔立龙
Owner 重庆路维康交通科技有限公司
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