Nano-composite modified asphalt mixture doped with straw cellulose and preparation method thereof

Abstract

The invention discloses a nano-composite modified asphalt mixture doped with straw cellulose and a preparation method of the nano-composite modified asphalt mixture. The modified asphalt mixture is mainly prepared from the following raw materials: mineral aggregate, asphalt, composite straw cellulose, a nano-modifier and the like, wherein the nano-modifier is prepared from nano calcium carbonate,nano silicon dioxide, a modifier and a dispersing agent; and the straw composite cellulose is prepared from cotton straw cellulose, corn straw cellulose, rice straw cellulose, an activating agent andother raw materials. The mixture provided by the invention has excellent pavement performance, and has obviously higher high-temperature, low-temperature and water stability than common asphalt mixtures. The invention also discloses a preparation method of the composite modified asphalt mixture, and the preparation method has the advantages of wide sources of raw materials, low price, simple preparation process, and economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to a nanocomposite modified asphalt mixture mixed with straw cellulose and a preparation method thereof. Background technique [0002] In my country's road construction projects, asphalt concrete pavement has been widely used because of its sufficient mechanical strength, certain elastic-plastic deformation capacity, no dust, simple construction and renewable. [0003] However, during the long-term service of this kind of pavement, due to the complex environmental changes and the gradual increase of traffic flow and load, the asphalt concrete pavement has cracks, ruts, potholes, looseness, edge gnawing and other diseases; It directly reflects some shortcomings of asphalt concrete pavement, such as: poor high temperature stability, easy to lose bearing capacity at high temperature; insufficient low temperature crack resistance, easy to crack at low temperature; poo...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a nano-composite modified asphalt mixture mixed with straw cellulose and a preparation method thereof, aiming at solving technical problems such as poor high-temperature stability of asphalt concrete, insufficient low-temperature crack resistance, and poor water stability, so as to ensure asphalt Improve the road performance of the mixture while reducing the high and low temperature disease and water damage of the asphalt pavement