An asphalt preparing method

Abstract

An asphalt preparing method is disclosed. The method includes reacting asphalt and unsaturated double-bond compounds under action of an initiator. In specific, the method includes putting the asphalt into a reactor firstly, adding the initiator with the weight of the initiator being 0.05-1% of the weight of the asphalt, adding the unsaturated double-bond compounds the weight of which is 1-10% of the weight of the asphalt and N-phenylmaleimide the weight of which is 0.1-1% of the weight of the asphalt at 80-160 DEG C into the reactor, maintaining the pressure to be 0.1-0.4 MPa, reacting for 3-6 h, degassing reaction products, and filtering to obtain modified asphalt. The chemically modified asphalt prepared by the method is excellent in performance, largely improves disadvantages of common asphalt such as high temperature sensitivity, low viscosity and poor toughness, and is capable of meeting road using performance and prolonging the service lifetime of roads. When the chemically modified asphalt is used for road surface maintenance and repair, the chemically modified asphalt is capable of shortening the traffic closing time, improving construction conditions and increasing the construction efficiency.

Description

technical field [0001] The invention relates to an asphalt preparation method and belongs to the technical field of asphalt chemical modification. Background technique [0002] Asphalt is widely used in road paving, road repair and maintenance. Compared with cement concrete pavement, asphalt pavement has the advantages of seamless, comfortable driving, small vibration and low noise. However, ordinary asphalt has strong temperature sensitivity, low viscosity, and poor flexibility, which brings a lot of inconvenience to use. In order to overcome the disadvantages of ordinary asphalt, research on asphalt modification has been carried out at home and abroad. Modified asphalt is to add modifiers to asphalt to improve the performance of asphalt or asphalt mixture. Among them, the modifiers are mostly: rubber, resin, high molecular polymer, finely ground rubber powder or other fillers. The disadvantage of this asphalt modification method is that because the modifier is simply add...

AI Technical Summary

Problems solved by technology

The disadvantage of this asphalt modification method is that because the modifier is simply added to the asphalt for physical blending, the problem of segregation and stratification is easy to occur, and for

[0003] Although the problems of asphalt such as strong temperature sensitivity, low viscosity, and poor flexibility have been improved, there has been no fundamental change in the molecular structure