Multi-scale nano-material composite modified asphalt mixture and preparation method thereof

Abstract

The invention discloses a multi-scale nano composite modified asphalt mixture and a preparation method thereof. The mixture is prepared from mineral aggregate, base asphalt, a stabilizer, styrene butadiene rubber, a multi-scale nano material and other raw materials. According to the invention, the asphalt is subjected to composite modification treatment by adopting the multi-scale nano composite material and the SBR, and the characteristics of few surface energy defects, many non-paired atoms, strong surface adsorption force and the like of inorganic nano particles are utilized, so that the inorganic nano particles can be better combined with the base asphalt, so that the modified asphalt has a relatively large damage load; the used raw materials are wide in source and low in price, and the prepared asphalt mixture is excellent in pavement performance and has obviously higher high-temperature, low-temperature and water stability than a common asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to a multi-scale nanocomposite modified asphalt mixture and a preparation method thereof. Background technique [0002] In recent years, due to the rapid development of the national economy, our country has paid more and more attention to road construction. Asphalt pavement has many advantages over the previous cement pavement. Asphalt pavement is a flexible pavement, which has the advantages of comfortable driving, low noise, fast construction speed, no dust, and easy repair; while cement pavement is a rigid pavement, which has high requirements for the roadbed. After the roadbed is deformed, the road surface is easily damaged. Once local damage occurs, it will affect driving comfort and will also have a great impact on the road surface. [0003] Although asphalt pavement has many advantages, with the increasing complexity of the road environment in recent years...

AI Technical Summary

Problems solved by technology

[0003] Although asphalt pavement has many advantages, with the increasing complexity of the road environment in recent years, the increase in traffic volume and the deterioration of the climate environment, it is difficult for asphalt pavement to meet the needs of use; Aging occurs due to the effects of light, water and ultraviolet rays, which leads to a decrease in the low-temperature crack resistance of the asphalt pavement, and then the elasticity of the asphalt will also decrease, affecting its road performance

[0004] The existing asphalt pavement cannot take into account the damage caused by high temperature, low temperature and water stability to the pavement at the same time