Evaluate Healing Performance of Asphalt Mixture Containing Steel Slag by Using Induction and Microwave Heating

2020 ◽  
pp. 485-491
Author(s):  
Tam Minh Phan ◽  
Dae-Wook Park ◽  
Tri Ho Minh Le ◽  
Jun-Sang Park
Keyword(s):  
Microwave Heating ◽  
Steel Slag ◽  
Asphalt Mixture

scholarly journals Microwave Heating Characteristics of Emulsified Asphalt Repair Materials Incorporated with Steel Slag

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yongfeng Wei ◽  
Jinyang Huo ◽  
Zhenjun Wang ◽  
Jiangtao Gao
Keyword(s):  
Microwave Heating ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Maximum Temperature ◽  
Interface Area ◽  
Heating Effects ◽  
Repair Materials ◽  
Three Stages ◽  
Emulsified Asphalt ◽  
Heating Technology

Emulsified asphalt needs to be cured for a certain age after demulsification to produce strength, which seriously affects the traffic opening time. In this work, microwave heating technology was applied for emulsified asphalt repair materials. Steel slag with high microwave activity was adopted to improve the performance of emulsified asphalt repair materials by microwave heating. Effects of steel slag sizes and contents on the heating rate, temperature distribution, and thermal performance of emulsified asphalt repair materials were analyzed by close microwave heating, open microwave heating, and repair simulation tests. Results show that the temperature of emulsified asphalt repair materials presents three different heating stages under microwave irradiation. The “critical point of phase transition” in the three stages is gradually advanced with the increase in steel slag content. The core temperature and maximum temperature of emulsified asphalt repair materials with different steel slag sizes are basically the same; however, the heat distribution of emulsified asphalt repair materials is significantly different. In contrast to conventional asphalt mixture, there exists a smaller temperature difference. The temperature of repairing materials can reach above 80°C. The interface area can form an embedded interface structure. Incorporation of steel slag and adoption of microwave heating are effective to improve the performance of emulsified asphalt repair materials.

scholarly journals Research on microwave heating performance of modified steel slag asphalt mixture

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402199047
Author(s):  
Yanfang Song ◽  
Zhe Wang ◽  
Yan Zhou ◽  
Rong Hu
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Microwave Heating ◽  
Test Piece ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Heating Process ◽  
Heating Performance ◽  
Bending Failure

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%.

Microwave heating properties of steel slag asphalt mixture using a coupled electromagnetic and heat transfer model

2021 ◽  
Vol 291 ◽  
pp. 123248
Author(s):  
Baowen Lou ◽  
Aimin Sha ◽  
Diego Maria Barbieri ◽  
Zhuangzhuang Liu ◽  
Fan Zhang
Keyword(s):  
Heat Transfer ◽  
Microwave Heating ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Heat Transfer Model ◽  
Transfer Model

Microwave Heating of Steel Slag Asphalt Mixture

2014 ◽  
Vol 599 ◽  
pp. 193-197 ◽  
Author(s):  
Yi Han Sun ◽  
Quan Tao Liu ◽  
Shao Peng Wu ◽  
Fei Shang
Keyword(s):  
Thermal Conductivity ◽  
Heating Rate ◽  
Microwave Heating ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Self Healing

In this research, the potential of using steel slag asphalt mixture as a self-healing material was investigated by means of microwave heating. The microwave heating rate and thermal conductivity of asphalt mixtures were tested respectively. The result shown that, the heating rate of steel slag asphalt mixtures is approximately two times faster than limestone asphalt mixtures. While its thermal conductivity is slightly lower. It is concluded that microwave heating can be used to promote self-healing of steel slag asphalt mixture.

scholarly journals Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 146 ◽  
Author(s):  
Haopeng Wang ◽  
Yue Zhang ◽  
Yi Zhang ◽  
Shuyin Feng ◽  
Guoyang Lu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Microwave Heating ◽  
Laboratory Tests ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Electromagnetic Properties ◽  
Heating Process ◽  
Heating Efficiency ◽  
Finite Element Software ◽  
Laboratory Test Results

Microwave heating is an encouraging heating technology for the maintenance, recycling, and deicing of asphalt pavement. To investigate the microwave heating properties of asphalt mixture, laboratory tests and numerical simulations were done and compared. Two types of Stone Mastic Asphalt (SMA) mixture samples (with basalt aggregates and steel slag aggregates) were heated using a microwave oven for different times. Numerical simulation models of microwave heating of asphalt mixture were developed with finite element software COMSOL Multiphysics. The main thermal and electromagnetic properties of asphalt mixture, served as the model input parameters, were measured through a series of laboratory tests. Both laboratory-measured and numerical simulated surface temperatures were recorded and analyzed. Results show that the replacement of basalt aggregates with steel slag aggregates can significantly increase the microwave heating efficiency of asphalt mixture. Numerical simulation results have a good correlation with laboratory test results. It is feasible to use the developed model coupling electromagnetic waves with heat transfer to simulate the microwave heating process of asphalt mixture.

Production and application of steel slag coarse aggregate in asphalt mixture

2017 ◽  
Vol 6 (1) ◽  
pp. 219-222 ◽  
Author(s):  
Meiling Zhao ◽  
Shaopeng Wu ◽  
Zongwu Chen ◽  
Chao Li
Keyword(s):  
Coarse Aggregate ◽  
Steel Slag ◽  
Asphalt Mixture

scholarly journals Microwave Absorption Ability of Steel Slag and Road Performance of Asphalt Mixtures Incorporating Steel Slag

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 663 ◽  
Author(s):  
Baowen Lou ◽  
Zhuangzhuang Liu ◽  
Aimin Sha ◽  
Meng Jia ◽  
Yupeng Li
Keyword(s):  
Microwave Absorption ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Asphalt Mixtures ◽  
Microwave Absorber ◽  
Self Healing ◽  
High Temperature Stability ◽  
Road Performance ◽  
On The Road

Excessive usage of non-renewable natural resources and massive construction wastes put pressure on the environment. Steel slags, the main waste material from the metal industry, are normally added in asphalt concrete to replace traditional aggregate. In addition, as a typical microwave absorber, steel slag has the potential to transfer microwave energy into heat, thus increasing the limited self-healing ability of asphalt mixture. This paper aims to investigate the microwave absorption potentials of steel slag and the effect of its addition on road performance. The magnetic parameters obtained from a microwave vector network analyzer were used to estimate the potential use of steel slag as microwave absorber to heal cracks. Meanwhile, the initial self-healing temperature was further discussed according to the frequency sweeping results. The obvious porous structure of steel slag observed using scanning electron microscopy (SEM) had important impacts on the road performance of asphalt mixtures. Steel slag presented a worse effect on low-temperature crack resistance and water stability, while high-temperature stability can be remarkably enhanced when the substitution of steel slag was 60% by volume with the particle size of 4.75–9.5 mm. Overall, the sustainability of asphalt mixtures incorporating steel slag can be promoted due to its excellent mechanical and microwave absorption properties.

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