A kind of environment-friendly anti-rutting modified asphalt and preparation method thereof

Abstract

The invention discloses environment-friendly and anti-rut modified asphalt. The modified asphalt is prepared from raw materials in percentage by mass as follows: 3%-7% of nano tin antimony oxide powder, 2.5%-6% of phyllosilicate mineral powder, 4%-8% of nano zinc oxide powder, 0.18%-0.3% of a coupling agent, 0.1%-0.18% of a dispersant and 78%-90% of asphalt. The environment-friendly and anti-rut modified asphalt can adsorb and degrade part of asphalt fume produced in the mixing and spreading process of an asphalt mixture, and the environmental pollution in the asphalt pavement construction process can be reduced; the temperature of pavement asphalt surfaces can be effectively decreased, the urban heat island effect can be relieved, so that the green and environmental protection requirements are met, and the environmental benefits are good. On the premise that the good pavement performance of the asphalt mixture is kept, the high temperature performance of the asphalt mixture is improved, and the rut damage can be reduced. The preparation process is simpler, a traditional hot-mixed asphalt concrete construction process is not changed during use, raw materials are safe and cheap, andthe modified asphalt has good generalizability and economic benefits.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to an environment-friendly anti-rutting modified asphalt and a preparation method thereof. Background technique [0002] At present, the technical solutions commonly used to reduce the temperature of asphalt pavement include: heat reflective coating for roads, large void pavement, water-retaining pavement, phase change pavement materials and thermal resistance pavement materials, etc. [0003] (1) Heat-reflective coating technology mainly makes materials with heat-resistant and reflective functions into coating materials that can be applied to asphalt pavement to reduce the heat energy absorption of asphalt pavement. (2) Large-void asphalt mixture is an open-graded asphalt mixture with interconnected voids and a porosity of about 20%, which can absorb heat from the pavement structure and reduce the temperature of the pavement. (3) The principle of water-retaining asphalt mixtu...

AI Technical Summary

Problems solved by technology

[0006] Patent ZL 201310517396.2 "A Modified Asphalt Concrete with Self-Temperature Control Function", which mainly solves the technical problem of "self-control temperature effect in different environments", but there are still the following problems: 1. Adopt heat resistance road surface materials, but in the hot season, especially in direct sunlight, the temperature rises too fast and the temperature is too high, which is easy to affect passers-by and the road environment

2. The road performance of warm mix asphalt mixture is often not as good as that of traditional hot mix asphalt mixture, which has a certain adverse effect on the road performance of asphalt mixture, and the cost of warm mix technology is relatively high, while hot mix asphalt mixture The road construction process needs to heat the asphalt mixture to a higher temperature, which will generate a large amount of asphalt fume and cause a large amount of polluting gas emissions

3. Pavement heat reflective coating technology, which is mostly used for pavement cooling, usually reduces the anti-glare performance and anti-skid performance of asphalt pavement. Under the dual effects of heavy-duty traffic and high asphalt pavement temperature, asphalt pavement is prone to rutting, etc. high temperature disease

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