scholarly journals THERMAL CONDITIONS OF ROAD PAVEMENTS AND THEIR INFLUENCE ON MOTOR TRAFFIC

Transport ◽  
2003 ◽  
Vol 18 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Alfredas Laurinavičius ◽  
Donatas Ďygas
Keyword(s):  
Asphalt Concrete ◽  
Thermal Conditions ◽  
Climatic Conditions ◽  
Concrete Pavement ◽  
Concrete Pavements ◽  
Road Asphalt ◽  
Concrete Mixtures ◽  
Research Findings ◽  
The Republic ◽  
Asphalt Concrete Pavement

The article presents the analysis of climatic conditions in the Republic of Lithuania and describes their influence on road asphalt concrete pavement. Dependence of the main properties of asphalt concrete mixtures on tempera~re is described with the help of carried out experiments. Research findings show that the probability of plastic defomations (rutting and corrugation) in asphalt concrete pavement is higher when the pavement temperature IS 20-40 C. Ptactical application of the presented conclusions and recommendations will enable to reduce the occurrence of undesirable deformations in asphalt concrete pavements and to improve traffic conditions on the roads.

scholarly journals Influence of Hydrated Lime on the Properties and Permanent Deformation of the Asphalt Concrete Layers in Pavement

2015 ◽  
Vol 4 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Ahmed F. Al-Tameemi ◽  
Yu Wang ◽  
Amjad Albayati
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Permanent Deformation ◽  
Fatigue Cracking ◽  
Hydrated Lime ◽  
Concrete Pavement ◽  
Partial Replacement ◽  
Repeated Loading ◽  
Concrete Mixtures ◽  
Asphalt Concrete Pavement

Abstract Flexible or asphalt concrete pavement is the paving system most widely adopted all over the world. It has been recognized that there are many different types of the factors affecting the performance and durability of asphalt concrete pavement, including the service conditions, such as: the variation of temperature from mild to extremes and the repeated excessive axle loading as well as the inadequate quality of the raw materials. All of these when combined together are going to accelerate the occurrence of distresses in flexible pavement such as permanent deformation and fatigue cracking. As the result, there has an urgent need to enhance the ability of asphalt concrete mixture to resist distresses happened in pavement. Use of additives is one of the techniques adopted to improve pavement properties. It has been found that hydrated lime might be one of the effective additives because it is widely available and relatively cheap compared to other modifiers like polymers. This paper presents an experimental study of the hydrated-lime modified asphalt concrete mixtures. Five different percentages of the hydrated lime additive were investigated, namely (1, 1.5, 2, 2.5 and 3 percent). The hydrated lime additive was used as partial replacement of limestone filler by total weight of the aggregate. The designed Hot Mix Asphalt (HMA) concretes are for the application of three pavement courses, i.e. Surface, Leveling and Base. These mixtures are designed and tested following Marshall procedure and uniaxial repeated loading to evaluate permanent deformation at different temperatures of 20°C, 40°C and 60°C. The experimental results show that the addition of hydrated lime as a partial replacement of ordinary limestone mineral filler results a significant improvement on mechanical properties and the resistant to permanent deformation of the designed asphalt concrete mixtures.

Modeling Analysis of Crack Repairing Structures for Asphalt Concrete Pavement

2013 ◽  
Vol 639-640 ◽  
pp. 377-381 ◽  
Author(s):  
Yi Chi ◽  
Jian Yin
Keyword(s):  
Asphalt Concrete ◽  
Composite Structure ◽  
Concrete Pavement ◽  
Concrete Pavements ◽  
Filling Materials ◽  
Modeling Analysis ◽  
Strain Stress ◽  
The Stability ◽  
Asphalt Concrete Pavement ◽  
External Loads

Crack is one of the major distresses in asphalt concrete pavements, which could significantly reduce the safety and amenity of driving, even the performance of the whole pavement structure. By means of diverse crack repairing manners, the durability and whole service life of the pavement can be improved and extended. After repairing, a composite structure of the repairing system is formed which consists of new crack filling materials and original asphalt concrete matrixes. In order to resist the external loads on the pavement, the composite structure mush work as an integrated structure and maintain sufficient adhesive strength. Therefore, the deformation compatibility of the composite structure is the vital performance for the stability and durability of the entire repairing system. In this study, a modeling analysis for the composite structure under various service conditions was carried out utilizing MIDAS software. The vertical and transverse deformation, transverse and longitudinal normal stress were analyzed by simulating the composite structure under several serving conditions. Based on the results，it was found that the strain, stress and related properties of the repair material and asphalt concrete matrixes could meet the requirements for an asphalt concrete pavement, and the compatibility of the composite structure was also satisfactory.

Asphalt Pavement Aging and Temperature Dependent Properties through a Functionally Graded Viscoelastic Model, Part-II: Applications

2009 ◽  
Vol 631-632 ◽  
pp. 53-58 ◽  
Author(s):  
Eshan V. Dave ◽  
William G. Buttlar ◽  
Glaucio H. Paulino
Keyword(s):  
Finite Elements ◽  
Asphalt Concrete ◽  
Viscoelastic Model ◽  
Concrete Pavement ◽  
Functionally Graded ◽  
Homogeneous Material ◽  
Concrete Pavements ◽  
Temperature Dependent Properties ◽  
Asphalt Concrete Pavement ◽  
Pavement Aging

This is the second article in a series of two papers describing simulation of functionally graded viscoelastic properties in asphalt concrete pavements. The techniques developed are applicable to other viscoelastic material systems with continuous, spatial grading of material properties. A full-depth asphalt concrete pavement has been simulated to demonstrate the applicability and importance of the graded viscoelastic analysis method. Based on the graded finite elements developed by Kim and Paulino[1], Buttlar et al. [2] used graded finite elements to determine typical responses to tire loading for an aged asphalt concrete pavement. In the current study, a similar pavement section is studied using the viscoelastic graded analysis (rather than elastic). Graded, layered and homogeneous material variations were used for a series of simulations, and the results from different approaches were compared.

MAIN INDICATORS OF BITUMENS OF THE AKTAU REFINERY PLANT

2021 ◽  
Vol 73 (1) ◽  
pp. 95-102
Author(s):  
S. S. Satayeva ◽  
◽  
K.A. Narikov ◽  
Keyword(s):  
Asphalt Concrete ◽  
Sharp Decrease ◽  
Concrete Pavements ◽  
Concrete Mixtures ◽  
Road Surfaces ◽  
Petroleum Bitumen ◽  
Technical Specifications ◽  
The Republic ◽  
Refinery Plant ◽  
Standard Terms

The practice of operating highways in the Republic of Kazakhstan shows that the durability of asphalt concrete pavements on them is much lower than the standard terms. Therefore, the maintenance of highways in a condition that meets the requirements of traffic flows is impossible without the use of new, progressive materials and technologies. The main factor affecting a sharp decrease in the service life of road surfaces is the use of lowquality bitumen in asphalt-concrete mixtures as a binder, since microcracks develop mainly in its film. The article deals with artificially synthesized bitumens of the Aktau bitumen plant: The following indicators of petroleum bitumen were studied: penetration, extensibility properties, brittleness temperature, softening and ignition temperature. It has been proven that the results obtained correspond to the technical specifications.

scholarly journals Study of crack resistance of asphalt concrete pavements of the streets of the city of Bryansk and roads of the Bryansk region

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Tatiana Levkovich ◽  
Zelgedin Mevlidinov ◽  
Pavel Rodin ◽  
Maxim Feshchenko
Keyword(s):  
Crack Resistance ◽  
Asphalt Concrete ◽  
Climatic Conditions ◽  
Concrete Pavements ◽  
Transverse Cracks ◽  
The Road ◽  
Road Surfaces ◽  
Internal And External Factors ◽  
Asphalt Concrete Pavement ◽  
The City

Asphalt concrete is the main type of coating the streets of the city of Bryansk and other cities of the Bryansk region, as well as roads outside settlements. A survey of the condition of asphalt concrete pavement of the streets of Bryansk and some parts of roads of other cities of the Bryansk region (streets of Surazh, Klintsy, Unecha, etc.) showed that in many areas there are surface destruction in the form of cracks: transverse, longitudinal and «grid». The presence of a crack in the coating of the road-reducing the load – bearing capacity of the road structure at the place of its formation. The crack resistance of asphalt concrete decreases during the operation of the coating due to a number of reasons: deterioration of the properties and structure of asphalt concrete under the influence of internal and external factors (water, freezing-thawing, air oxygen, ultraviolet and infrared irradiation, the nature and degree of interaction of bitumen with mineral material, the structure and composition of bitumen, etc.), low-temperature stretching, aging of the binder, etc. The authors of these studies set the task to check the quality of the properties of bitumen BND 60/90 and BND 90/130 with the introduction of polymer additives, carbon black, etc., as well as asphalt concrete mixtures with the introduction of polystyrene and polyurethane foam and other additives in the construction of road surfaces in hot summer climatic conditions to increase the crack resistance of asphalt concrete coatings. The paper presents an analysis of the main parameters of transverse cracks in the city of Bryansk on the streets: Fokina, Sovietskaja, Gorbatova, Krahmaleva, as well as road surfaces of the Bryansk region.

scholarly journals TECHNOLOGICAL AGEING INFLUENCE ON VISCOSITY OF SELECTED BITUMENS

2003 ◽  
Vol 9 (1) ◽  
pp. 20-24
Author(s):  
Piotr Radziszewski ◽  
Robert Ziolkowski ◽  
Donatas Čygas
Keyword(s):  
Asphalt Concrete ◽  
Ageing Process ◽  
Concrete Pavements ◽  
Practical Application ◽  
Traffic Conditions ◽  
Concrete Mixtures ◽  
Different Types ◽  
Research Findings

The article presents one of the main parameters of bitumens used for asphalt concrete mixtures production—viscosity. The authors analyse technological ageing process and its influence on viscosity of selected bitumens. Dependence of the viscosity of bitumens on type and amount of the additives, temperature and ageing is described through experiments. Research findings show that the employment of different types of additives increases bitumen viscosity and positively effect the bitumen ageing resistance. Practical application of presented conclusions and recommendations will enable to improve the main characteristics of asphalt concrete pavements and traffic conditions on roads.

scholarly journals REGULARITIES OF DEFECT DEVELOPMENT IN THE ASPHALT CONCRETE ROAD PAVEMENTS

2002 ◽  
Vol 8 (3) ◽  
pp. 206-213 ◽  
Author(s):  
Henrikas Sivilevičius ◽  
Kazys Petkevičius
Keyword(s):  
Asphalt Concrete ◽  
Correlation Coefficients ◽  
Concrete Pavement ◽  
Regression Equations ◽  
Transport Costs ◽  
The Road ◽  
Road Pavement ◽  
Pavement Deterioration ◽  
The Republic ◽  
Asphalt Concrete Pavement

A new classification of asphalt concerete pavement defects is presented in the article and the causes of their development are systematised. The dynamics of asphalt concrete pavement defect development in the road and the dependence of pavement deterioration on the type of defects are presented in the theoretical graphic model. The change of road pavement structural strength (stiffness modulus) depending on the pavement service life is also described. The dependence of the level of asphalt concrete pavement on the most important roads of the Republic of Lithuania (road Vilnius-Kaunas [Al] and motorway Vilnius Panevėžys [A2]) measured with one-wheel dynamometric trailer PKRS-2U (Russia) on the level of pavement deterioration has been identified through experiments. The analysis of the dependence of transport costs and driving speed on road pavement level has been carried out. Regression equations of such dependence and correlation coefficients as well as relations are presented too.

Experience of application of epoxн asphalt concrete pavement on road bridges

2019 ◽  
pp. 78-92
Author(s):  
Vladimir Zelenovsky ◽  
◽  
Ivan Kopinets ◽  
Arthur Onishchenko ◽  
◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Asphalt Concrete Pavement
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