Preparation method of composite modified asphalt convenient for post cleaning

Abstract

The invention provides a preparation method of composite modified asphalt convenient for post cleaning. The preparation method comprises the steps that asphalt and mineral oil are heated to 60 DEG C-100 DEG C, 20-40 parts by weight of a surfactant is added into the asphalt, and stirring is conducted for 10-30 min to obtain modified asphalt; water is heated to 40 DEG C-60 DEG C, then a modifier, a blender and an emulsifier are sequentially added into the water, and after stirring is conducted for 5-10 min, mixed soap liquid is obtained; the modified asphalt and the mixed soap liquid are mixed and mechanically stirred for 30-40 min at the temperature of 80 DEG C-100 DEG C, after the materials are stirred to be uniform, the temperature is lowered to 20 DEG C-25 DEG C, and then the cationic composite modified asphalt is obtained. A micro-cracked ground crack is sealed more closely, the surface adsorption capacity of the micro-cracked ground crack is higher, an impermeable isolation layer can be formed on the surface of the ground crack to prevent surface rain and the like from permeating to the stratum, and therefore the service life of a road surface is prolonged; through addition of the surfactant, the asphalt can easily fall off from an adhesion material during post cleaning to avoid the condition that the surfactant component is added in a cleanser again, therefore, the cleaning cost is reduced, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of road surface repair materials, and more specifically relates to a preparation method of composite modified asphalt which is convenient for later cleaning. Background technique [0002] At present, the emulsified asphalt commonly used as ultra-thin wear layer sticky layer oil and stone chip seal layer in highway construction is mostly fast-cracking ordinary emulsified modified asphalt. The viscous layer oil for ultra-thin wear layer requires emulsified asphalt not only to bond the surface layer and the underlying layer, but more importantly, it can partially enter the upper asphalt mixture to play the role of sealing layer. However, ordinary emulsified modified asphalt is often difficult to meet the actual traffic and climate conditions, and its road performance is poor. When ordinary emulsified modified asphalt is used as ultra-thin wear layer sticky layer oil or stone chip seal layer bonding material, o...

AI Technical Summary

Problems solved by technology

However, ordinary emulsified modified asphalt is often difficult to meet the actual traffic and climate conditions, and its road performance is poor.

When ordinary emulsified modified asphalt is used as ultra-thin wear layer sticky layer oil or stone chip seal layer bonding material, often due to its small viscosity, it will flow when spraying a large amount, so that the emulsified modified asphalt cannot be sprayed or a very small amount Into the hot mix mixture, resulting in poor sealing effect, serious water seepage on the road surface, and road surface diseases such as shifting, peeling, pits, cracks, etc. will appear shortly after opening to traffic

Even if the viscosity of some emulsified modified asphalt meets the requirements of use, the high temperature, low temperature, elastic recovery and other indicators of the modified asphalt after demulsification cannot meet the technical requirements of ultra-thin wear layer, and the above-mentioned pavement diseases will still appear in the end

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