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

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...

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.

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