Towards simulation of compaction processes

2012 ◽  
Author(s):  
Johan Boetker ◽  
Georg Scharrer ◽  
Johannes Khinast ◽  
Søren Soegaard ◽  
Joergen Garnaes ◽  
...  
Keyword(s):  
Compaction Processes

Modeling the effect of skidded timber bunches on forest soil compaction

2020 ◽  
pp. 154851292097870
Author(s):  
Igor Grigorev ◽  
Olga Kunickaya ◽  
Albert Burgonutdinov ◽  
Olga Burmistrova ◽  
Varvara Druzyanova ◽  
...  
Keyword(s):  
Calculated Data ◽  
Forest Products ◽  
Permafrost Soil ◽  
Negative Consequences ◽  
Limit Values ◽  
Cryolithic Zone ◽  
Tree Length ◽  
Solid Soil ◽  
Increasing Demand ◽  
Compaction Processes

An increasing demand for forest products incites a large number of log transportation operations, which may lead to negative consequences for the soil and the ecosystem as a whole. This paper presents a mathematical model to estimate the soil deformation and compaction processes under the influence of individual components of the skidding system, such as the forwarder, limbs, butts, and tops of tree-lengths in high latitudes, permafrost soil, and forests of the cryolithic zone. The effectiveness of the proposed model was evaluated according to experimental results. Comparative analysis showed that the calculated data differ from the experimental data by no more than 10%. The deformation of the soil by the bunch of tree-length logs occurs due to shearing processes. It has been established that the initial vertical stress exceeds the radial stress by 30–40%. The result of estimating the dependency of the shelterbelt width on the number of tree-length logs showed that the limit values for logs amount to 4–6 units for the mild, medium, and solid soil categories. The obtained results and the developed model will allow for a qualitative and quantitative assessment of the technological impact on the soil during the projecting of maps for logging operations.

Monitoring of Soil Density During Compaction Processes

2019 ◽  
pp. 409-419
Author(s):  
Arkadiusz Kwaśniewski ◽  
Tomasz Mirosław ◽  
Sebastian Bąk ◽  
Paweł Ciężkowski ◽  
Jan Maciejewski
Keyword(s):  
Soil Density ◽  
Compaction Processes

scholarly journals A new method for the analysis of compaction processes in high-porosity agglomerates

2007 ◽  
Vol 10 (2) ◽  
pp. 89-91 ◽  
Author(s):  
L. -O. Heim ◽  
H. -J. Butt ◽  
J. Blum ◽  
R. Schräpler
Keyword(s):  
New Method ◽  
High Porosity ◽  
Compaction Processes

scholarly journals Compared performance of penetrometers and effect of soil water content on penetration resistance measurements

2014 ◽  
Vol 38 (3) ◽  
pp. 744-754 ◽  
Author(s):  
Edison Aparecido Mome Filho ◽  
Alvaro Pires da Silva ◽  
Getulio Coutinho Figueiredo ◽  
Fernando Henrique Setti Gimenes ◽  
André Cesar Vitti
Keyword(s):  
Soil Water ◽  
Penetration Resistance ◽  
Moisture Sensor ◽  
Modern Agriculture ◽  
Soil Moisture Sensor ◽  
Soil Penetration Resistance ◽  
Harvesting Systems ◽  
Compaction Processes ◽  
Action Modes ◽  
Correct Data

Modern agriculture techniques have a great impact on crops and soil quality, especially by the increased machinery traffic and weight. Several devices have been developed for determining soil properties in the field, aimed at managing compacted areas. Penetrometry is a widely used technique; however, there are several types of penetrometers, which have different action modes that can affect the soil resistance measurement. The objective of this study was to compare the functionality of two penetrometry methods (manual and automated mode) in the field identification of compacted, highly mechanized sugarcane areas, considering the influence of soil water volumetric content (θ) on soil penetration resistance (PR). Three sugarcane fields on a Rhodic Eutrudrox were chosen, under a sequence of harvest systems: one manual harvest (1ManH), one mechanized harvest (1MH) and three mechanized harvests (3MH). The different degrees of mechanization were associated to cumulative compaction processes. An electronic penetrometer was used on PR measurements, so that the rod was introduced into the soil by hand (Manual) and by an electromechanical motor (Auto). The θ was measured in the field with a soil moisture sensor. Results showed an effect of θ on PR measurements and that regression models must be used to correct data before comparing harvesting systems. The rod introduction modes resulted in different mean PR values, where the "Manual" overestimated PR compared to the "Auto" mode at low θ.

scholarly journals Evaluation of Short-Term Aging Protocol for Asphalt Mixtures

2019 ◽  
Vol 9 (14) ◽  
pp. 2783 ◽  
Author(s):  
Sirin ◽  
Paul ◽  
Kassem ◽  
Ohiduzzaman
Keyword(s):  
Mechanical Properties ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Asphalt Mixtures ◽  
Pavement Performance ◽  
Design Stage ◽  
Construction Site ◽  
Short Term ◽  
Compaction Processes

Asphalt mixtures are subjected to short-term aging during the production, placement, and compaction processes. Proper evaluation of asphalt pavement performance relies on the accurate characterization of asphalt mixtures during the design stage. In this study, three different loose asphalt mixtures often used in Qatar were evaluated to develop a laboratory short-term aging procedure. Sample mixtures 1 and 3 were collected from a construction site, while mixture 2 was obtained from an asphalt plant. Virgin aggregates and binders were also collected to reproduce the mixtures in the laboratory. Laboratory-produced mixtures were conditioned at 135 °C using various time durations. The mechanical properties of laboratory-produced mixtures were compared to those of mixtures produced on site. The results of the mechanical and binder testing demonstrated that the proper short-term aging protocol for asphalt mixtures often used in road construction in the State of Qatar would involve heating asphalt mixtures for 4 h at 135 °C before laboratory compaction.

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