Research on microwave heating performance of modified steel slag asphalt mixture

Yanfang Song,Rong Hu,Zhe Wang,Yan Zhou

doi:10.1177/1687814021990479

Abstract

Aiming at the change law of the flexural and tensile strength of the modified steel slag asphalt mixture during microwave heating, the results of this paper are as follows: the microwave heating process can achieve the recovery of the flexural and tensile properties of the modified steel slag asphalt mixture. The number of point bending failure tests continues to increase, and the recovery rate of bending and tensile properties of beams made of modified steel slag asphalt mixture will slowly decrease until the test piece is completely destroyed. The flexural and tensile strength of beams made by microwave heating asphalt mixture cannot be fully recovered, but different asphalt mixtures have different recovery effects. Compared with the ordinary basalt asphalt mixture, the steel slag asphalt mixture before modification has the same bending and tensile repair effect after microwave heating, while the modified steel slag asphalt mixture has the first bending and tensile repair effect after microwave heating increased by 23%.

Highlights

Asphalt pavements are mostly adopted in my country’s highway pavement at this stage, and the asphalt pavement will be eroded by various natural conditions during use, including: temperature difference between day and night, severe rain and snow weather, long-term fatigue load of automobiles, etc.[1,2] The existence of these factors will cause various forms of damage to the asphalt pavement: potholes, ruts, pumping, etc.[3]
The results show that microwave heating has a good healing effect on asphalt mixture
This paper mainly analyzes the influence of microwave heating mechanism on the road performance of modified steel slag asphalt mixture, and uses three-point bending test to analyze the effect of microwave heating on the bending recovery of modified steel slag asphalt mixture

Summary

Introduction

Asphalt pavements are mostly adopted in my country’s highway pavement at this stage, and the asphalt pavement will be eroded by various natural conditions during use, including: temperature difference between day and night, severe rain and snow weather, long-term fatigue load of automobiles, etc.[1,2] The existence of these factors will cause various forms of damage to the asphalt pavement: potholes, ruts, pumping, etc.[3]. This paper mainly analyzes the influence of microwave heating mechanism on the road performance of modified steel slag asphalt mixture, and uses three-point bending test to analyze the effect of microwave heating on the bending recovery of modified steel slag asphalt mixture. A microwave oven is used to heat the modified steel slag asphalt mixture, and an infrared thermometer (as shown in Figure 1) is used to measure the temperature of the modified asphalt.

Results

Conclusion