Technology for blending modified cold mix asphalt

Abstract

The invention provides a technology for blending modified cold mix asphalt, comprising the materials of modified cold mix asphalt, wrapping agent selected from solid alkyl cationic surfactant, water and aggregate, and uses equipment such as a modified cold mix asphalt liquid atomizer with higher atomization consistency and viscosity, a nebulizer of nebulization wrapping liquid, a mixed stirrer, a metrical instrument, a container and the like. The aggregate composition conforms with requirements of standard JTG F40-2004 and JTG E42-2005, and the aggregate with the grain diameter being less than 0.15mm is replaced by cement powder. The asphalt-aggregate ratio is 4-12%. The spraying amount of the wrapping agent accounts for 1-2.5% of the weight of the aggregate. The blending technology can be completed by the following three steps: taking aggregate with the grain diameter being more than 0.15mm, spraying the wrapping agent, and blending with 25-50% of cold mix asphalt; taking aggregate with the grain diameter being less than 0.15mm, and evenly blending with the first mixture; and finally blending residual cold mix asphalt or diluted cold mix asphalt with the blended mixture to form tri-layer wrapped mastic asphalt.

Description

technical field [0001] The invention relates to a mixing process of cold-mixed asphalt for highway pavement. Through the mixing process, road surface asphalt mixture meeting the requirements of JTG F40-2004 can be obtained. Background technique [0002] A large number of asphalt is used as the pavement cementitious material for highway pavement. As a cementitious material, asphalt must first be heated and melted, and the high-grade pavement must be modified and processed. At the same time, the aggregate must be heated to 200°C, and then mixed. Under heat preservation, it will be transported, paved, and rolled to form asphalt pavement. All processes consume a lot of fuel and generate greenhouse gases. At the same time, the project construction is seriously affected by the climate, the process coordination requirements are strict, the material utilization rate is low, and the waste is serious. Seriously pollute the environment and the health of construction workers. [000...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a modified cold-mix asphalt mixture mixing process, which is used to replace hot asphalt or thermally modified asphalt, and solve the problems of inability to store existing hot asphalt, poor engineering performance, short use seasons and problems with use. climate demanding issues

It also solves the problem that the existing modified emulsified asphalt in the market cannot be used with mixed asphalt concrete or its road surface asphalt concrete paving thickness cannot reach more than 2cm and the performance index is low.