Experimental Studies Of Wear and Tear of Asphalt Concrete Surfacing Under the Action of Water Pressure in the Micropores

2021 ◽  
pp. 83-91
Author(s):  
В. В. Волков ◽  
В. А. Козлов ◽  
В. Н. Мелькумов
Keyword(s):  
Experimental Data ◽  
Asphalt Concrete ◽  
Water Pressure ◽  
Experimental Studies ◽  
Hydrodynamic Effect ◽  
Depth Of Penetration ◽  
The Road ◽  
Flow Parameters ◽  
Wear And Tear ◽  
Asphalt Concrete Pavement

Постановка задачи. Целью исследования является выявление влияния увлажненного покрытия на его износ. Рассматривается механизм воздействия транспортной нагрузки в присутствии влаги и экспериментальные методы измерения ее воздействия на износ верхнего слоя асфальтобетона. Результаты. Определен вклад наличия влаги в верхнем слоя дорожного покрытия на его износ в виде образования колеи, исследовано гидродинамическое воздействие воды в микропорах покрытия. Получены экспериментальные данные величин давления воды в порах асфальтобетонного покрытия в увлажненном состоянии под действием колес движущегося транспортного потока. Это позволило определить максимальные величины барического воздействия, глубину проникновения фронта давления жидкости и влияние его на разрушение покрытия. Выводы. Анализ полученных данных показал не только наличие хрупкого разрушения, но и наличие ударного воздействия движущейся в порах асфальтобетона влаги, превышающего его структурную прочность. С использованием экспериментальных данных получены регрессионные зависимости величины износа от стандартных параметров потока. Для эксплуатируемых покрытий регрессионная зависимость позволяет прогнозировать величину износа на весь жизненный цикл дороги. Statement of the problem. The purpose of the study is to identify the effect of a wetted surfacing on its wear and tear. The mechanism of the effect of transport load in the presence of moisture and experimental methods of measuring its effect on the wear of the upper layer of asphalt concrete are discussed. Results. The contribution of the presence of moisture in the upper layer of the road surface to its wear and tear in the form of rutting is identified, and the hydrodynamic effect of water in the micropores of the surface is examined. Experimental data on the values of water pressure in the pores of an asphalt concrete pavement in a wet state under the action of the wheels of a moving traffic stream have been obtained. This made it possible to identify the maximum values of the pressure effect, the depth of penetration of the liquid pressure front and its influence on the destruction of a surfacing. Conclusions. Analysis of the obtained data showed not only the presence of brittle fracture, but also an impact effect of moisture moving in the pores of asphalt concrete exceeding its structural strength. Using the experimental data, regression dependences of the wear and tear value on the standard flow parameters were obtained. For the pavements in use, the regression dependence makes it possible to predict the amount of wear and tear for the entire life cycle of the road.

scholarly journals EXPERIMENTAL STUDIES OF WEARING AND TEARING OF ASPHALT CONCRETE SURFACING UNDER THE ACTION OF WATER PRESSURE IN MICROPORES

2021 ◽  
pp. 83-92
Author(s):  
V. V. Volkov ◽  
V. A. Kozlov ◽  
V. N. Melkumov
Keyword(s):  
Experimental Data ◽  
Asphalt Concrete ◽  
Water Pressure ◽  
Fluid Pressure ◽  
Experimental Studies ◽  
Hydrodynamic Effect ◽  
Depth Of Penetration ◽  
Wear And Tear ◽  
The Impact ◽  
Whole Life Cycle

Statement of the problem. The goal of this study is to identify the effect of wet surfacing on its wear and tear. The mechanism of influence of transport loading in the presence of moisture and experimental methods of measurement of its influence on wear and tear of the top layer of asphalt concrete are discussed. Results. The contribution of the presence of moisture in the upper layer of the pavement to its wear and tear in the form of track formation was identified, and the hydrodynamic effect of water in the micropores of the pavement was investigated. Experimental data on the values of water pressure in the pores of the asphalt-concrete pavement in the moistened state under the action of the wheels of the moving traffic flow were obtained. Therefore it became possible to identify the maximum values of the pressure effect, the depth of penetration of the fluid pressure front and its effect on the destruction of the surfacing.Conclusions. The analysis of the data showed not only the presence of brittle fracture, but also the impact of moisture moving in the pores of asphalt concrete, exceeding its structural strength. Using experimental data, regression dependences of the wear and tear value on the standard flow parameters were obtained. For the operated surfacings regression dependence enables one to predict the size of wear and tear for the whole life cycle of the road.

scholarly journals IDENTIFICATION OF INDICATORS OF INTERACTING INDUSTRIAL ENTERPRISE SUBSYSTEMS FOR ACHIEVING QUALITY MANAGEMENT PURPOSES

2021 ◽  
Vol 5 (12) ◽  
pp. 136-144
Author(s):  
O. Anikeeva ◽  
A. Ivahnenko ◽  
M. Storublev
Keyword(s):  
Asphalt Concrete ◽  
Weather Conditions ◽  
Poor Quality ◽  
Engineering Structures ◽  
Repair Work ◽  
The Road ◽  
Bitumen Emulsion ◽  
On The Road ◽  
Asphalt Concrete Pavement ◽  
The Impact

Highways are the most important component of country's economic development. They are a complex of engineering structures that are subject to various kinds of deformations during operation. The causes of premature defects are outdated technologies, poor quality materials, high traffic loads, and weather conditions. On average, after 2–3 years of the new road operation, pits, overflows, potholes, cracks, rutting occur on asphalt concrete pavement, its presence worsens the traffic conditions on the road and violates the unimpeded passage of cars. To extend the life cycle of a transport object, there are preventive measures that prevent the destruction of road surfaces. Such activities include regular maintenance and repair work. One of the effective measures is the use of road impregnation materials (RIM). Road-impregnation materials are used in case of need to prevent aging of the organic binder in the composition of asphalt concrete in the coating, as well as to reduce the impact of external factors. In this article, the influence of the basis of the impregnating material of two manufacturers on the indicators of the properties of asphalt concrete of various degrees of destruction is investigated. Among the considered impregnating compositions, solvent-based road impregnation materials proved to be the most effective. It has been established that the abrasive effect on samples of asphalt concrete significantly reduces the effectiveness of impregnating materials, especially based on bitumen emulsion.

scholarly journals Assessment of Skid Resistance of Road Pavements

2020 ◽  
Vol 15 (3) ◽  
pp. 157-168
Author(s):  
Lina Šneideraitienė ◽  
Daiva Žilionienė
Keyword(s):  
Asphalt Concrete ◽  
Experimental Studies ◽  
Skid Resistance ◽  
Heavy Vehicles ◽  
The Road ◽  
Mastic Asphalt ◽  
Road Pavement ◽  
Stone Mastic Asphalt ◽  
The Individual ◽  
Paved Road

The quality of the paved road depends not only on the decisions of the road designer and the work carried out but also on the materials used. Most of the aggregates used are imported from other countries. However, the usage of domestic materials reduces the cost of the road pavement and the use of aggregates produced by a special production technology in Lithuania, i.e., dolomite aggregates instead of granite aggregates. Experimental studies were carried out on the skid resistance of the road surface. It was found that the coefficient of skid resistance met the requirements for surface dressing with dolomite aggregate, and the results were analysed with 95% probability. This coefficient partially met the requirements for asphalt concrete, while it did not meet the requirements at all for stone mastic asphalt. The surface roughness, however, met the requirements for road sections where granite aggregates were used instead of dolomite in mixes of surface dressing and asphalt concrete. The analysis was carried out considering the volume of traffic and the service life of the individual road sections. It was determined that it was suitable for a 5-year guarantee period to perform the surface dressing, wearing course of asphalt concrete and stone mastic asphalt with dolomite aggregate where part of heavy vehicles is less than 20% of traffic flow. The use of granite aggregates was justified only in the road where heavy vehicles dominated.

scholarly journals Simulation of stresses in asphalt-concrete pavement with frost heaving

2018 ◽  
Vol 216 ◽  
pp. 01011 ◽  
Author(s):  
Vladimir Churilin ◽  
Sergei Efimenko ◽  
Oleg Matvienko ◽  
Viktor Bazuev
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Road Surface ◽  
Stress Fields ◽  
Winter Period ◽  
The Road ◽  
Software Product ◽  
Surface Section ◽  
Full Scale Tests ◽  
Asphalt Concrete Pavement

The article reviews the issue of the stress-strain state of the road surface in the winter period as a result of roadbed soil heaving. The main purpose of the work is to determine the stress fields in the asphalt-concrete pavement, which is necessary for designing of frost-resistant roadbeds in the areas with seasonal freezing of roadbed soils. The following research methods were used: theoretical, laboratory, field. With consideration of different properties of materials and geometric dimensions of the road surface section, stress fields in the asphalt-concrete pavement during freezing were obtained with the use of the software product. Comparison of theoretical studies with the results of experimental and full-scale tests showed that the forms of theoretical solutions describe the stress fields in the freezing asphalt-concrete pavement quite accurately.

scholarly journals Increasing the Durability of Asphalt Pavement - the Road to Road Safety

2021 ◽  
Vol 334 ◽  
pp. 01027
Author(s):  
Valentina Yadykina ◽  
Rashid Sharapov ◽  
Christina Pashkova ◽  
Anatoly Gridchin ◽  
Anna Trautvain
Keyword(s):  
Asphalt Concrete ◽  
Road Safety ◽  
Water Resistance ◽  
Experimental Studies ◽  
Softening Temperature ◽  
The Road ◽  
Fatigue Durability ◽  
The Impact ◽  
Positive Effect

Based on literature data, the paper analyzed the impact of transport operational indicators related to the quality of road surface coverage on road safety. It presented the results of experimental studies on the effect of the road adhesion cationic thermostable additive on the properties of bitumen and asphalt concrete. The authors identified that the introduction of this additive leads to an increase in the viscosity and softening temperature of bitumen, its adhesion to mineral materials, which has a positive effect on strength, water resistance, shear stability, crack resistance, fatigue durability of asphalt concrete. The conclusion was made about the regularity of improving road safety, related to the improvement of the quality of the pavement, arranged from asphalt concrete with the application of the tested additive.

scholarly journals INTEGRATED APPROACH TO THE GEODESIC CONTROL OF THE INSTALLATION OF ASPHALT-CONCRETE COATING ON THE EXAMPLE OF THE CONSTRUCTION OF THE ROAD BRIDGE TRANSITION ACROSS THE KERCH SHEET

2020 ◽  
Vol 1 (1) ◽  
pp. 106-119
Author(s):  
Victor P. Goluk ◽  
Denis G. Nazarov
Keyword(s):  
Asphalt Concrete ◽  
A Priori ◽  
Integrated Approach ◽  
Geodetic Survey ◽  
Concrete Pavement ◽  
The Road ◽  
Measurement Results ◽  
Concrete Coating ◽  
Algebraic Difference ◽  
Asphalt Concrete Pavement

During the construction of bridges, special attention is paid to geometric parameters, one of the most important parameters of the rideable bed is the evenness of the bases and coatings. Geodetic works provide an integrated approach to solving the problem of controlling the flatness of the base layers, which includes: geodetic survey of the rideable canvas, verification of working documentation, control of the copying string, geometric control of the evenness of the laid asphalt concrete floor slab for the steel concrete span and bridge deck for a metal span structure. Various options for controlling the height position of a copier string and a laid asphalt concrete pavement (using trigonometric and geometric leveling) were reviewed and tested. A priori assessment of the accuracy of the measurement results for each of the methods for monitoring algebraic difference of elevations (amplitudes) was previously performed. The article proposes a combined approach to geodetic control at all stages of work on checking the evenness of the asphalt concrete pavement.

scholarly journals Providing interlayer adhesion of dissimilar layers of top road surfaces

2021 ◽  
Vol 274 ◽  
pp. 02003
Author(s):  
Talgat Gabdullin ◽  
Marat Makhmutov
Keyword(s):  
Layer Thickness ◽  
Asphalt Concrete ◽  
Road Construction ◽  
Concrete Mixture ◽  
Cement Concrete ◽  
The Road ◽  
Road Pavement ◽  
Concrete Base ◽  
Pavement Layers ◽  
Asphalt Concrete Pavement

The article reviews the option of how to make the top pavement of asphalt-concrete mixture adhere reliably to the base, which is the underlying cement-concrete coating. The bitumen-latex emulsion is suggested as a binder for the two pavement layers. The research aimed to determine the optimal layer thickness of the bituminous-latex emulsion to be applied and achieve the maximum interlayer adhesion between the top asphalt-concrete pavement and the cement-concrete base. After full-scale experiments, the required layer thickness of the bitumen-latex emulsion was 2 mm. With this layer thickness of the binder, road pavement layers do not delaminate and shear when stressed by the intensive flows of vehicles moving on the roads. The results obtained are important for the road construction industry for suggesting the formulation of bitumen-latex emulsion and finding the most effective layer thickness to be applied. The suggested formulation of a bitumen-latex emulsion is frost-resistant. The article describes the experimental steps for determining the optimal application thickness at a fair length. The maintenance-free life of roads with an asphalt-concrete mixture on a cement-concrete base interlayered with a bitumen-latex emulsion as a binder is assumed to get much longer.

Research on Asphalt Concrete Pavement Edge Molding Machine with Intelligent and Automatic

2014 ◽  
Vol 971-973 ◽  
pp. 1125-1128 ◽  
Author(s):  
Gen Li Shan ◽  
Yao Zhen Liu
Keyword(s):  
Control System ◽  
Asphalt Concrete ◽  
Raw Materials ◽  
Concrete Pavement ◽  
Pneumatic System ◽  
Molding Machine ◽  
The Road ◽  
Asphalt Concrete Pavement ◽  
Side Mode

This paper designs an intelligent automatic mounting machine . For the purpose of reducing the steps of remodeling of excess asphalt and saving asphalt concrete . Before paving mixing , it laid two rows of fixed and adjustable thickness of the side-mode and mold clamp on both sides of the road . The results show that it avoids the process of removing the extra asphalt, saving raw materials, improving the efficiency of the paving . Mainly describe control system , especially pneumatic system.

Elastoplastic Analysis of Asphalt Concrete Pavement

2012 ◽  
Vol 204-208 ◽  
pp. 1801-1808
Author(s):  
Hong Peng Ren ◽  
Jin Chang Wang
Keyword(s):  
Asphalt Concrete ◽  
Friction Angle ◽  
Concrete Pavement ◽  
Flow Rule ◽  
The Road ◽  
Perfectly Plastic ◽  
On The Road ◽  
Elastic Perfectly Plastic ◽  
Asphalt Concrete Pavement ◽  
The Impact

Drucker-Prager linear elastic-perfectly plastic model and the associated flow rule, a numerical simulation study has been conducted on the layered asphalt concrete pavement structure, using the 2D axisymmetric finite element method (FEM). Pursuant to empirical equation of the stability, cohesion and internal friction angle of asphalt concrete, and in line with experimental test subjects on pavement material and pavement performance, the impact of mechanical parameters of each layer of asphalt concrete on the road surface deflection and the evolution law of plasticity in each structural layer under standard axle load has been studied.

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