scholarly journals Investigation on Deicing Property of Steel Wool Fiber-Reinforced Asphalt Mixture by Induction Heating

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Fa Yang ◽  
Kehong Li ◽  
Rui Xiong ◽  
Bowen Guan ◽  
Hua Zhao
Keyword(s):  
Ambient Temperature ◽  
Induction Heating ◽  
Traffic Safety ◽  
Fiber Length ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Melting Rate ◽  
Wool Fiber ◽  
Output Current ◽  
Steel Wool

In order to effectively solve the traffic safety problem caused by snow and ice covering the pavement in winter, steel wool fibers with different length and content were adopted in asphalt mixture to investigate its deicing performance. The deicing principle of steel wool fiber asphalt mixture by induction heating was expounded. Effects of different ice thicknesses, output currents, and ambient temperatures for asphalt mixture deicing performance were studied using an indoor-simulated induction heating deicing test. The deicing mechanism of steel wool fiber asphalt mixture by induction heating was analyzed. Grey relation entropy analysis between the average melting ice rate and the influencing factors was determined. The results show that the average ice melting rate of the asphalt mixture increases with the increase in steel wool fiber length and content. The steel wool fiber asphalt mixture heated by electromagnetic induction obtains satisfactory result. The average melting ice rate of asphalt mixture containing 6% steel wool fiber with a length of 3 mm can reach 0.50°C·s−1 at an ambient temperature of −5°C. The thinner the ice and the higher the ambient temperature, the higher the average melting ice rate. The output current is positively correlated with the average melting ice rate. The degree of influence of the five influence factors on the average melting ice rate is ranked in order as follows: fiber content, fiber length, output current, ambient temperature, and ice layer thickness.

Electrical, Thermal and Induction Heating Properties of Dense Asphalt Concrete

2013 ◽  
Vol 723 ◽  
pp. 303-311 ◽  
Author(s):  
Alvaro Garcia ◽  
Jose Norambuena-Contreras ◽  
Manfred N. Partl
Keyword(s):  
Induction Heating ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Void Content ◽  
Steel Wool ◽  
Electrically Conductive ◽  
Wool Fibers ◽  
Conductive Fibers ◽  
Different Diameters ◽  
Air Void

Induction heating consists in adding electrically conductive fibers to the asphalt mixture and heating them with an induction heating device. But still, the factors that affect the increase of temperature are not well-known. With this purpose, 25 different mixtures, with the same aggregates distribution and amount of bitumen, but with 2 different lengths, 4 different quantities, and 4 different diameters of steel wool fibers have been considered. The influence of fibers on the air void content, electrical and thermal conductivity and on the induction heating of dense asphalt concrete has been studied. It was found that steel wool fibers increase slightly the electrical and thermal conductivities of dense asphalt concrete. Finally, it has been observed that the temperature reached due to the induction heating, increases with the number of fibers in the mixture and with their diameter.

Experimental Study on Mix Ratio Design and Road Performance of Medium and Small Deformation Seamless Expansion Joints of Bridges

2021 ◽  
pp. 036119812098474
Author(s):  
Pengzhen Lu ◽  
Chenhao Zhou ◽  
Simin Huang ◽  
Yang Shen ◽  
Yilong Pan
Keyword(s):  
Traffic Safety ◽  
Performance Test ◽  
Asphalt Mixture ◽  
Small Deformation ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Mixture Ratio ◽  
The Road ◽  
Marshall Test ◽  
Road Performance

Expansion joints are a weak and fragile part of bridge superstructure. The damage or failure of the expansion joint will lead to the decline of bridge durability and endanger the bridge structure and traffic safety. To improve the service life and performance of bridge expansion joints, the ideal method is to use seamless expansion joints. In this study, starting from the commonly used asphalt mixture gradation of seamless expansion joint, and taking into account the actual situation of bridge expansion joint structure and environment in China, the gradation and asphalt-aggregate ratio are preliminarily designed. Through a Marshall test, the corresponding asphalt mixture is evaluated and analyzed according to the stability, flow value, and void ratio, and the optimal gradation and asphalt-aggregate ratio are determined. Finally, the asphalt mixture is prepared with the mixture ratio design, and the test results of an immersion Marshall test, fatigue performance test, and full-scale test verify that the asphalt mixture meets the road performance requirements of seamless expansion joints. On the basis of the experimental data, the performance of large sample asphalt mixture is continuously tested, compared, and optimized. The results show that the asphalt mixture ratio designed is true and reliable, which can provide reference for the optimal design of seamless expansion joint filler.

A Convenient Method for Preparing the Cell-Membrane Network of the Wool Fiber, and a Note on the Effect of Ethanol on the Membranes in the Intact Fiber

1976 ◽  
Vol 46 (5) ◽  
pp. 360-366 ◽  
Author(s):  
K. Rachel Makinson
Keyword(s):  
Cell Membrane ◽  
Ambient Temperature ◽  
Convenient Method ◽  
Cell Membranes ◽  
Cortical Cell ◽  
Wool Fiber ◽  
Rapid Preparation ◽  
Cuticular Membrane ◽  
Expanded Form

A method is described for the rapid preparation of the cell-membrane network of a wool fiber in an expanded form suitable for microscopy. The form of the network is considerably modified by prior soaking of the fiber in ethanol at ambient temperature; this is ascribed to extraction of lipids from the membranes, so destroying their mutual adhesion by releasing them from the intercellular cement. A modification of the preparative technique is described that produces cortical cell membranes inside a tube of mutually adhering, relatively unaltered cuticle cells. This modification reveals particularly clearly the bilaterality of the cortex and any differences in reactions of the cuticle around the circumference of the fiber. Some earlier work on the existence of a “sub-cutis,” “sub-cuticular membrane,” or “zwischenmembran” is discussed and reinterpreted in the light of certain features observed in the course of this work. Deposition of polymers on the fiber makes the cuticle less extensible, so that it may split during preparation of the membranes.

scholarly journals Evaluation of the Effect of Fiber Type, Length, and Content on Asphalt Properties and Asphalt Mixture Performance

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1556 ◽  
Author(s):  
Fucheng Guo ◽  
Rui Li ◽  
Shuhua Lu ◽  
Yanqiu Bi ◽  
Haiqi He
Keyword(s):  
Fiber Length ◽  
Fiber Type ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Basalt Fiber ◽  
Temperature Stability ◽  
Fiber Content ◽  
Engineering Properties ◽  
Fiber Reinforced ◽  
High Temperature Stability

Fiber-reinforced asphalt mixture has been widely used in pavement engineering to not only prevent asphalt binder leakage but also improve engineering properties of asphalt mixture. However, the research on three key parameters, namely fiber type, fiber length, and fiber content, which significantly affect the performance of fiber-reinforced asphalt mixture, have seldom been conducted systematically. To determine these three key parameters in the support of the application of fibers in mixture scientifically, three commonly used fibers were selected, basalt fiber, polyester fiber, and lignin fiber, and the testing on fibers, fiber-reinforced asphalt binders, and fiber-reinforced asphalt mixtures was conducted afterwards. The results showed: the favorable fiber type was basalt fiber; the favorable basalt fiber length was 6mm; the engineering properties including high temperature stability, low temperature crack resistance, and water susceptibility were clearly improved by the added basalt fiber, and the optimum basalt fiber content was 0.4 wt.%. The obtained results may be valuable from a practical point of view to engineers and practitioners.

Study on the effective composition of steel slag for asphalt mixture induction heating purpose

2018 ◽  
Vol 178 ◽  
pp. 542-550 ◽  
Author(s):  
Jiuming Wan ◽  
Shaopeng Wu ◽  
Yue Xiao ◽  
Zongwu Chen ◽  
Dong Zhang
Keyword(s):  
Induction Heating ◽  
Steel Slag ◽  
Asphalt Mixture

Study on Ice Breaking on Crumbed Rubber Asphalt Pavement Based on Self-Stress Method

2012 ◽  
Vol 256-259 ◽  
pp. 1807-1812 ◽  
Author(s):  
Qing Yi Xiao ◽  
Hong Jun Cui ◽  
Ning Li Li ◽  
Cai Li Zhang
Keyword(s):  
Elastic Modulus ◽  
Traffic Safety ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Highway Traffic ◽  
Friction Test ◽  
Rubber Content ◽  
Fem Method ◽  
The Relationship

Ice layer on pavement surface was a serious problem for highway traffic safety. Crumbed rubber asphalt mixture was an effective way to drive ice layer away from surface. Through wheel test asphalt mixture specimen with ice layer at negtive temperature, the paper studied ice breaking performance of asphalt mixtures containing different amount crumbed rubber. Pendulumlike friction test BPN after wheel test was taken as an performance index of crumber rubber asphalt breaking ice. Results shown that the quantity of crumbed rubber and the performance of ice breaking had good linear relationship and more rubber content had better slide resistance recover speed at same wheel arround number.Through numerial model of pavement covered ice based on FEM method, the paper had analyzed the relationship between elastic modulus of crumbed rubber pavement and ice stress-strain on pavement, and put forward the mechanism of ice breaking.

Research on Water Damage of Asphalt Pavement and Control Measures

2012 ◽  
Vol 178-181 ◽  
pp. 1560-1563 ◽  
Author(s):  
Yan Liu ◽  
Bo Liu
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Water Source ◽  
Control Measures ◽  
Water Damage ◽  
Prevention And Control Measures ◽  
Pavement Damage ◽  
And Control

Asphalt pavement of water damage is a major form of our country highway asphalt pavement damage, the paper analyzes pavement structure internal water source, water damage of asphalt pavement of the influence factors, through the determination of the three indexes and asphalt of asphalt mixture splitting tensile strength, water erosion proof of asphalt mixture and its influence, and put forward the corresponding prevention and control measures to improve the pavement performance and extend the service life of road surface has important practical value.

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