Fundamentals of roller integrated compaction control for oscillatory rollers and comparison with conventional testing methods

Pistrol, Johannes; Adam, Dietmar

doi:10.1016/j.trgeo.2018.09.010

Cited by 29 publications

(19 citation statements)

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“…The preparation process of heavy-duty compaction and vibration compaction specimens is the same, and the experimental results are analyzed [36].…”

Section: Specimens Preparation With Different Compaction Methodsmentioning

confidence: 99%

Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method

et al. 2019

Applied Sciences

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In this paper, the basic composition and performance evaluation of the recycled asphalt pavement (RAP) materials were firstly analyzed, and two methods were proposed to evaluate strength characteristics of RAP materials, including a triaxial method for the residual strength and the mortar cementing method for the strength of RAP lump. Then, the cold recycling technology was applied on RAP materials with emulsified asphalt by using vibratory compaction and heavy-duty compaction methods (Proctor compaction method), and the results showed that the maximum dry density obtained by heavy-duty compaction was closer to the actual situation. Finally, the effects of wetting water, emulsified asphalt dosage and curing conditions on the performance of the specimens were investigated. It was found that when the emulsified asphalt was mixed uniformly, whether or not to add the wetting water have almost no effect on the strength of the molded specimens. When the matrix asphalt content of the emulsified asphalt was 30%~60%, the water could be directly added to the cold recycling mixture. The intensity of accelerated curing for two days at 40 • C was approximately equal to that of natural curing for three days, while that of accelerated curing for three days at 40 • C was approximately equal to that of natural curing for seven days, which provided a basis for the short-term laboratory test. emulsion content, aggregate properties, coating and adhesion tests. Strength testing mainly refer to the indirect tensile strength test, in addition to resistance, moisture-induced damage sensitivity test and rutting test [7]. A. Widayanti et al. used SEM imaging technology to observe the morphology and surface texture of the RAP materials [8]. Also, Y. N. Li et al. evaluated the effects of emulsified asphalt and cement on the porosity, indirect tensile strength, tensile strength ratio, dynamic stability and mechanical properties of RAP materials [9]. X. Zhang made an in-depth research on the RAP materials treatment process from four aspects: Method of recycling RAP materials, selection of crushing equipment, old material screening process, storing and testing [10]. F. Ye et al. researched the layered aging regulation of asphalt stratification on the surface of RAP materials [11]. T. Ma et al. researched the effects of aging properties in asphalt on the performance of 48 RAP materials by measuring the low temperature performance of mortar with bending beam 49 rheometer (BBR) [12].However, there has not been a uniform conclusion on the research of RAP materials compaction methods abroad. Some of the compaction methods are mainly selected according to different design methods of recycling asphalt mixtures. Generally, the Marshall compaction method is used to mold specimens for the Marshall design method. The kneading method is used for Hveem method. The gyratory compaction method is used for Superpave design method, which is more popular in the U.S. and Sweden [13][14][15].H. Y. Wei et al. used the method of vibration compaction specimens and de...

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“…The preparation process of heavy-duty compaction and vibration compaction specimens is the same, and the experimental results are analyzed [36].…”

Section: Specimens Preparation With Different Compaction Methodsmentioning

confidence: 99%

Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method

et al. 2019

Applied Sciences

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“…Adding up Eqs. (19) and 24, and replacing x M and its first and second derivatives by the independent coordinates δ and x A and their derivatives through Eqs. 14, (17), and (18), leads to the first equation of motion in terms of δ and x A ,…”

Section: Stick Phasementioning

confidence: 99%

“…To derive the first equation of motion of the 3DOF model in the slip phase, in Eqs. (19) and (20) the tangential force component T is replaced by the expression of Eq. (27), representing the friction force T f .…”

Section: Slip Phasementioning

confidence: 99%

“…developed yet. Based on the data of field tests with an oscillation roller, recently, it was discovered that the area enclosed in the figure which is formed when plotting the vertical against the horizontal acceleration of the drum center, is a characteristic quantity for the compaction degree of the subsurface [19]. Since, however, experiments provide only a selective insight into the response behavior of the entire parameter space, a complete picture of the drum response and its parameter interdependency can only be gained by the outcomes of comprehensive parametric numerical studies.…”

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confidence: 99%

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Analytical modeling of the stick-slip motion of an oscillation drum

Paulmichl

Adam

2019

Acta Mech

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In this paper, a lumped parameter model of the interacting oscillation roller-subsurface system is proposed. The main aim of the model is to predict the response acceleration of the roller drum during nearsurface compaction of non-cohesive soils. The compaction process of the soil itself is not captured, but different degrees of compaction are considered by varying the soil stiffness. The roller is represented by the oscillation drum and its viscoelastic connection to the roller frame. In the chosen modeling strategy, the curvature of the soil surface below the drum is prescribed. In this way, also the vertical drum acceleration can be computed. The discrete subsoil model consists of a vertical and a horizontal Kelvin-Voigt element. Contact between drum and soil surface is described by means of dry friction according to Coulomb's law. As such, the stick-slip motion of the drum can be simulated. In the stick phase, pure rolling between drum and soil surface is assumed. The highly nonlinear equations of motion of this three degrees-of-freedom model are derived separately for the stick and the slip phase of the motion. Selective numerical studies show that this model captures the fundamental response characteristics of the dynamic drum-subsoil interacting system observed in the field. 1 Introduction A roller, also often referred to as roller-compactor, is a heavy equipment used for near-surface compaction of soil and asphalt layers in the construction of various civil structures such as roads, airfields, dams, and track foundations. A static roller uses only its weight to compact the layer, whereas a dynamic roller enhances the efficiency of subsurface compaction through dynamic excitation of the drum. Depending on the drum excitation, two basic types of dynamic rollers do exist, i.e., vibratory rollers and oscillation rollers. They differ in design, mode of operation, and how the medium to be compacted is loaded. In a vibrating drum, a single unbalance mass, which is attached concentrically to the drum axis, generates a rapidly alternating upwarddownward motion of the drum. The subgrade is compacted by the dynamic pressure applied by the drum. An oscillation drum is equipped with two offset eccentric masses, which rotate synchronously in the same direction. The resulting alternating high-frequency forward-backward motion of the drum, superposed with the translational roller motion, imposes dynamic shear forces that increase the subsurface density. Continuous Compaction Control (CCC) ([1,11]) has become the standard technology for controlling subsurface compaction by vibratory rollers. This control technique is based on the dynamic response of the interacting drum-subsurface system recorded during the roller pass, and thus, allows an instant continuous assessment of the degree of compaction. For oscillation rollers, however, no mature CCC system has been

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“…The advantages of this technology include speed and low cost [1]. However, this is a complicated process, and in order to achieve the best compaction results, the design of the compaction rollers is still in development [2][3][4][5]. One of the negative effects of this technology is the generated vibration that is transmitted to the surrounding rock environment [6,7].…”

Section: Introductionmentioning

confidence: 99%

Alternative Approaches to Measurement of Ground Vibrations Due to the Vibratory Roller: A Pilot Study

Nedoma

Stolárik

Kepák

et al. 2019

Sensors

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At present, one of the primary tasks of the construction industry is to build transport infrastructure. This concerns both the construction of new bypasses of towns and the repair of existing roads, which are damaged by congestion, especially by freight transport. Whether it is a new building or a reconstruction, it is always very important to choose a suitable method of subsoil treatment. One of the most commonly used methods for soil treatment is currently compaction using vibratory rollers. This method is very effective both in terms of results and due to its low financial demands compared to other methods. Vibration is transmitted to the surrounding rock environment when compacting the subsoil using vibratory rollers. Although the intensity of these vibrations is not as pronounced as in other methods of subsoil treatment, such vibrations can have a significant effect, for example during compaction in urban areas or in an area with the presence of historical objects. Therefore, it is very advisable to monitor the effect of these vibrations on the environment during construction. This paper brings an original experimental comparative study of standard seismic instrumentation with a developed interferometric sensor for the field of monitoring vibrations generated during compaction of subsoil using vibrating rollers. The paper presents time and frequency domain results, as well as attenuation curves, which represent real attenuation of vibrations in a given rock environment. The results presented here show that a system operating on a different physical principle from the one used at present has the potential to replace the existing, very expensive, seismic equipment.

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Fundamentals of roller integrated compaction control for oscillatory rollers and comparison with conventional testing methods

Cited by 29 publications

References 1 publication

Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method

Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method

Analytical modeling of the stick-slip motion of an oscillation drum

Alternative Approaches to Measurement of Ground Vibrations Due to the Vibratory Roller: A Pilot Study

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