Tongji University

Qingbing Lu

Lijun Sun

Liping Liu

Mingchen Li

The present invention provides a method for preparing a hot-mixed asphalt mixture, and relates to the technical field of road engineering. In the present invention, asphalt and aggregates are preheated separately, where the aggregates include coarse aggregates and fine aggregates; the coarse aggregates, part of the fine aggregates and asphalt that are preheated are subjected to a first mixing to obtain a first mixture; the remaining fine aggregates are added to the first mixture for a second mixing to obtain a second mixture; and a mineral powder is added to the second mixture for a third mixing, and discharging is conducted to obtain a hot-mixed asphalt mixture.

Method for preparing hot-mixed asphalt mixture

Disclosed is a method for determining a mixing temperature of an asphalt mixture which includes the following steps: S, obtaining a test result of surface energy of hot-melt asphalt; S, obtaining, according to a calculation formula for total adhesion work and in combination with the test result of the surface energy of the hot-melt asphalt, total adhesion work of an asphalt and aggregate interface at different mixing temperatures; S, determining a temperature range corresponding to peak values of the total adhesion work of the asphalt and aggregate interface; and S, calculating a median value of the temperature range determined in S, so as to determine an optimum mixing temperature of the asphalt mixture.

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Shanghai, China

Qingbing Lu