Effect of Temperature on Adhesion of Clay Soil to Steel

Azadegan, B; Massah, Jafar

doi:10.2478/v10298-012-0011-z

Cited by 30 publications

(8 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ultrasonic exposure reduces soil adhesion to working bodies of earth-moving machines due to thermal and vibration impact on the contact surface. In comparison with thermal exposure [6,10] by flexible electrical trace heating tapes (ENGL-1) applying the PM3-4/18 magnetostriction transducer to contact the surface with the temperature from 0 to 80 °С allows one to reach a 15…35 % decrease of shearing force. The most significant decrease takes place with the temperature from 0 to 30 °С.…”

Section: Discussionmentioning

confidence: 99%

“…Mine excavators operating trial shows that when exploiting wet cohesive overburden rocks (especially under subzero temperature) freezing over and adhesion of ground on working bodies vaguely reduces machinery performance (figure 1). This performance decrease is caused by reduced useful capability of a bucket because of incomplete unloading, increase of cutting (digging) drag force resulted by wet ground adhesion to working tool, growth of ram drag of a bucket, longer machine downtime required for cleaning working tools [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Ultrasonic Exposure on Soil Adhesion to Working Bodies of Earth-Moving Machines

Zenkov¹

2019

Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)

View full text Add to dashboard Cite

When the moist cohesive soil is excavated, the soil sticking and freezing to the working units of the earth-moving machines take place, which considerably reduces their efficiency. There are four main groups of methods intended for eliminating adhesion of soil to the surface of the working bodies of earthmoving machines. As for the nature and the operating principles of the methods, they can be divided into the preventive methods and the means for cleaning working units of earth-moving machines. PM3-4/18 (ПМ3-4/18) magnetostriction transducer was used in the experiment as a source of ultrasonic oscillations. Ultrasonic exposure belongs to a group of combined methods of eliminating adhesion. In order to evaluate efficiency of ultrasonic exposure the experiments were carried out on shear bench. Environment temperature range for the experiments was limited from-25 to +15 °С. Ultrasonic exposure allows reducing soil adhesion to working bodies of earth-moving machines due to thermal and vibrational impact on contact surface.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Ultrasonic Exposure on Soil Adhesion to Working Bodies of Earth-Moving Machines

Zenkov¹

2019

Proceedings of the International Conference on Aviamechanical Engineering and Transport (AviaENT 2019)

View full text Add to dashboard Cite

show abstract

“…Also energy losses increase and quality of work drops because friction forces go up. Friction force while digging and levelling account for 30…70% of total digging resistance while performance decreases 1.2…2 times and more [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Research Subjectmentioning

confidence: 99%

Strength Analysis of EK-18 Excavator Bucket Construction for Mounting of Anti-adhesive Devices

Zenkov¹

2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

View full text Add to dashboard Cite

3D rigid-body model of a bucket of power shovel EK-18 was built using modern CAD (Computer Aided Design) software. A tetrahedral grid with 10-node second-order elements was chosen, and the given model was imported to APM WinMachine -model preparation preprocessor for finite element analysis. A finite element model was based on the geometrical model, imported from KOMPAS-3D to APM Studio. Calculation of the stressed-strained state of the bucket was carried out under the forces emerging while digging with "back hoe" equipment. Shift, deformation and tension charts were planned and the most and the least strained areas were pointed out. Wet coherent soil excavation deals with soil adhesion to working bodies of power shovels and leads to reduced performance. Performance decrease is caused by a reduction of useful bucket capacity and partial unloading, increased front resistance to cutting (digging) caused by wet soil adhesion to a working body, increased bucket entry resistance, increased idle time caused by necessity to clean working bodies. Also energy losses increase and quality of work drops because friction forces go up. Friction force while digging and levelling account for 30…70 percent of total digging resistance while performance decreases 1.2…2 times and more. Vibrothermal exposure creates new technological effect which involves a wider humidity range of efficient application and a reduction of friction forces. Disintegrating adhesion bonds with heating requires less driving force from the vibrator. Vibration boosts up heating of the contact layer, which reduces thermal energy losses. However, the question of piezoelectric ceramic actuators location on the excavator bucket needs to be dealt with. The most suitable spots for mounting piezoelectric ceramic devices for reducing soil adhesion to the excavator bucket were defined. Their efficiency is derived from combined (vibrothermal) methods of exposure. Such devices eliminate soil adhesion to bucket and increase efficiency of using power shovels with wet coherent soils.

show abstract

“…In order to measure adhesion forces, studies have been conducted using devices varying from the very simple, which consist of shear boxes (e.g., Langmaack 2000;Yoshimi and Kishida 1981;Yusu and Dechao 1990) and pulling devices (e.g., Azadegan and Massah 2012;Sass and Burbaum 2008;Thewes and Burger 2005), to the very sophisticated, such as that proposed by Zumsteg and Puzrin (2012).…”

Section: Approaches For the Assessment Of Clogging Potentialmentioning

confidence: 99%

Mechanical properties of clayey soil relevant for clogging potential

Alberto-Hernandez

Kang

et al. 2017

International Journal of Geotechnical Engineering

View full text Add to dashboard Cite

Due to its advantages, including reduced operation time and cost, tunneling with boring machines in urban areas has become a popular technique over handtunneling or open-trench excavations. However, tunneling in clayey soil poses a great challenge since the mechanical and physical properties of clays cause different issues, one of which is clogging. To solve this problem, engineers have treated the soils with different soil conditioners in order to change their rheological properties, improve their manageability, and eliminate undesirable characteristics. However, the root of this problem is the lack of understanding the phenomenon and characterizing it on the framework of soil mechanics. By considering the use of polymers, this paper aims to provide information regarding the theory involved in this mechanism and the factors influencing clogging potential. The authors present a systematic study of the physical and mechanical properties of plain soil and conditioned soil, which includes a direct shear test, vane shear test, and Atterberg limits test. Results show that the initial water content, roughness of shear plate, and percentage of additive have a significant effect on the clogging potential. Additionally, the results are plotted on an empirical diagram to understand the clogging potential by relating the clogging potential to soil properties.

show abstract

Effect of Temperature on Adhesion of Clay Soil to Steel

Cited by 30 publications

References 5 publications

Impact of Ultrasonic Exposure on Soil Adhesion to Working Bodies of Earth-Moving Machines

Impact of Ultrasonic Exposure on Soil Adhesion to Working Bodies of Earth-Moving Machines

Strength Analysis of EK-18 Excavator Bucket Construction for Mounting of Anti-adhesive Devices

Mechanical properties of clayey soil relevant for clogging potential

Contact Info

Product

Resources

About