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Abstract

Microwave heating is a kind of heating method studied recently in China and abroad, which has the advantages of deep heating, good uniformity, and high energy utilization. In the past, microwave heating technology was mostly applied to the daily maintenance of asphalt pavement but was not applied to hot in-place recycling in asphalt pavement. Based on the principle and characteristics of microwave heating, this paper put forward the unique combined process flow of microwave-assisted heating and hot in-place recycling in China and abroad and carried out the application of microwave-assisted heating and hot in-place recycling in Lianyungang–Khorgos Expressway maintenance project. The research results show that the scheme with a microwave heater directly heating the original road surface is not suitable, and the scheme with a microwave heater for secondary heating is determined. The hot in-place recycling project practice of Lianyungang–Khorgos Expressway shows that after microwave heating, the heating temperature inside the milling material can be increased by 14 °C, which ensures the mixing and paving temperature and construction quality of the subsequent mixture.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.007

First Page

37

Last Page

42

Submission Date

March 2025

Reference

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