Modified asphalt and preparation method thereof

Abstract

The invention discloses modified asphalt which comprises the following components in parts by weight: 75-95 parts of matrix asphalt, 1-10 parts of star-shaped SBS, 1-5 parts of waste rubber powder, 1-5 parts of waste plastic, 1-4 parts of a cross-linking agent, 0.8-1.5 parts of a compatilizer, 0.5-1.2 parts of kieselguhr, 0.5-0.8 part of nylon fiber, 0.3-0.7 part of carbon black, 0.3-0.5 part of talcum powder, 0.1-0.3 part of a stabilizer, 0.2-0.1 part of zinc oxide and 0.01-0.04 part of an ester solvent. The invention further provides a preparation method of the modified asphalt. The modified asphalt which is prepared by using the preparation method that different components are matched is good in high-temperature stability, low-temperature anti-cracking property and anti-fatigue property, relatively high in softening point and relatively good in adhesion property.

Description

technical field

[0001] The invention relates to the field of asphalt technology, more specifically, the invention relates to a modified asphalt and a preparation method. Background technique

[0002] At present, with the continuous increase of traffic volume and the continuous increase of heavy-duty vehicles, some asphalt pavements have various degrees of early damage such as ruts, cracks, and potholes shortly after they are officially opened to traffic, which not only causes great economic losses. Losses have also brought greater hidden dangers to driving comfort and driving safety. Therefore, the development of road traffic puts forward higher requirements on the performance of asphalt pavement, which makes it difficult for ordinary asphalt mixture to meet the requirements of asphalt pavement.

[0003] Modified asphalt refers to the asphalt binder made by adding modifiers such as rubber, resin, high molecular polymer, natural asphalt, ground rubber powder or other materia...