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

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.

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Research on microwave heating performance of modified steel slag asphalt mixture

Advances in Mechanical Engineering ◽

10.1177/1687814021990479 ◽

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%.

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

Lecture Notes in Civil Engineering - ICSCEA 2019 ◽

10.1007/978-981-15-5144-4_44 ◽

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

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

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.123248 ◽

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

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Microwave Heating of Steel Slag Asphalt Mixture

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.599.193 ◽

2014 ◽

Vol 599 ◽

pp. 193-197 ◽

Cited By ~ 14

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.

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Profile Features of Emulsified Asphalt Mixture Containing Steel Slag Based on Laser Scanning

Materials ◽

10.3390/ma13122679 ◽

2020 ◽

Vol 13 (12) ◽

pp. 2679 ◽

Cited By ~ 1

Author(s):

Feng Wang ◽

Peide Cui ◽

Xiaoshan Zhang ◽

Mujaheed Yunusa ◽

Yue Xiao

Keyword(s):

Laser Scanning ◽

Asphalt Pavement ◽

Steel Slag ◽

Asphalt Mixture ◽

Three Dimensional ◽

Free Calcium ◽

Skid Resistance ◽

Pavement Surface ◽

Aggregate Morphology ◽

Emulsified Asphalt

Micro-surfacing (MS), made of emulsified asphalt, is the most commonly used preventive maintenance technology in asphalt pavement. However, the studies on profile features of MS based on aggregate morphology are few. This study evaluated the profile features of MS and its effect on skid resistance. The aggregate morphologies were first characterized and modified emulsified asphalt was prepared. The three-dimensional profile features of four kinds of MS samples were captured by laser texture scanner. Results illustrate that steel slag aggregate can be used to enhance the skid resistance of pavement surface and bring about larger profile indexes than basalt and limestone due to its angularity index and flatness values. Further aging of steel slag to eliminate free calcium oxide (f-CaO) is recommended before being used in pavement surface layer.

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Laboratory and Numerical Investigation of Microwave Heating Properties of Asphalt Mixture

Materials ◽

10.3390/ma12010146 ◽

2019 ◽

Vol 12 (1) ◽

pp. 146 ◽

Cited By ~ 5

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.

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Usefulness of Foundry Tooling Materials in Microwave Heating Process

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0101 ◽

2013 ◽

Vol 58 (3) ◽

pp. 919-922 ◽

Cited By ~ 2

Author(s):

K. Granat ◽

B. Opyd ◽

D. Nowak ◽

M. Stachowicz ◽

G. Jaworski

Keyword(s):

Electromagnetic Field ◽

Microwave Heating ◽

Loss Factor ◽

Perturbation Technique ◽

Resonant Cavity ◽

Precise Determination ◽

Heating Process ◽

Basic Criterion ◽

Measurement Results ◽

Heating Technology

Abstract The paper describes preliminary examinations on establishing usefulness criteria of foundry tooling materials in the microwave heating technology. Presented are measurement results of permittivity and loss tangent that determine behaviour of the materials in electromagnetic field. The measurements were carried-out in a waveguide resonant cavity that permits precise determination the above-mentioned parameters by perturbation technique. Examined were five different materials designed for use in foundry tooling. Determined was the loss factor that permits evaluating usefulness of materials in microwave heating technology. It was demonstrated that the selected plastics meet the basic criterion that is transparency for electromagnetic radiation.

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Preparation of WC-TiC-Ni3Al-CaF2 functionally graded self-lubricating tool material by microwave sintering and its cutting performance

High Temperature Materials and Processes ◽

10.1515/htmp-2020-0004 ◽

2020 ◽

Vol 39 (1) ◽

pp. 45-53 ◽

Cited By ~ 1

Author(s):

Siwen Tang ◽

Rui Wang ◽

Pengfei Liu ◽

Qiulin Niu ◽

Guoqing Yang ◽

...

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Microwave Heating ◽

Cutting Performance ◽

Conventional Heating ◽

Hard Alloys ◽

Dry Cutting ◽

Temperature Oxidation ◽

Lubricating Material ◽

Heating Technology

AbstractWith the concern of the environment, green dry cutting technology is getting more and more attention and self-lubricating tool technology plays an important role in dry cutting. Due to the demand for high temperature performance of tools during dry cutting process, cemented carbide with Ni3Al as the binder phase has received extensive attention due to its excellent high temperature strength and high temperature oxidation resistance. In this paper, WC-TiC-Ni3Al-CaF2 graded self-lubricating material and tools were prepared by microwave heating method, and its microstructure, mechanical properties and cutting performance were studied. Results show that gradient self-lubricating material can be quickly prepared by microwave heating technology, and the strength is equivalent to that of conventional heating technology. CaF2 not only plays a role in self-lubrication, but also refines the grain of the material. A reasonable gradient design can improve the mechanical properties of the material. When the gradient distribution exponent is n1 = 2, the material has high mechanical properties. Cutting experiments show that the WC-TiC-Ni3Al-CaF2 functional gradient self-lubricating tool has better cutting performance than the homogeneous WC-TiC-Ni3Al hard alloys.

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