Environmental protection asphalt modifier and preparation method thereof

Abstract

The invention relates to an environmental protection asphalt modifier. The environmental protection asphalt modifier comprises the following components in parts by weight: 40-50 parts of waste rubber powder, 16-20 parts of organic montmorillonite, 8-10 parts of an activating agent, 5-8 parts of stearic acid, 10-15 parts of a stabilizer, 1-6 parts of an antioxidant, 3-10 parts of a warm mix agent, 15-20 parts of nanosilver and 12-18 parts of silicon carbide. The environmental protection asphalt modifier is small in use amount, low in cost, and high in environment-friendly performance. The invention further provides a preparation method for the asphalt modifier.

Description

technical field [0001] The invention relates to a road surface asphalt material modifier, in particular to a green and environment-friendly asphalt modifier and a preparation method thereof. Background technique [0002] At present, there are two types of modifiers used for highway asphalt pavement: one is the modifier that increases the softening point of the asphalt, which can prevent the sun from being exposed to the sun in summer, such as SBS (thermal rubber) and waste tire rubber powder; the other One is a modifier that improves the low temperature ductility of asphalt. [0003] The asphalt modifier for improving low-temperature ductility is mainly used in highway asphalt pavement, which can prevent asphalt pavement from cracking at low temperature in winter and prolong the service life of asphalt pavement. [0004] Usually, in order to improve the low-temperature ductility of asphalt, rubber oil (an aromatic hydrocarbon) is added to asphalt, but this rubber oil still ...

AI Technical Summary

Problems solved by technology

[0005] 1. The effect of improving the low-temperature ductility of asphalt is not good; according to JTGF40-2004 "Technical Specifications for Highway Asphalt Pavement Construction", modified asphalt is based on different regional characteristics, and the softening point is 45-60 ° C. The low-temperature ductility should not less than 20-50cm

It is often difficult to meet the requirements of construction specifications when traditional modifiers are used alone;

[0006] 2. In order to achieve higher low-temperature ductility, it is added in a large amount in asphalt, and the amount of rubber oil is usually 3-6% / t modified asphalt; in addition, in order to make the modified asphalt products meet the requirements of low-temperature ductility, It is also necessary to increase the amount of other modifiers such as SBS, which is not conducive to cost reduction;

[0007] 3. Rubber oil is a petroleum product, which is a non-renewable raw material, and a large amount of consumption is not conducive to environmental protection