scholarly journals ANALYSIS OF THE INFLUENCE OF THE QUALITATIVE COMPOSITION OF THE ASPHALT-CONCRETE MIXTURE ON THE MAIN PERFORMANCE CHARACTERISTICS OF ASPHALTIC CONCRETE PAVEMENT

2020 ◽  
pp. 17-23
Author(s):  
Anna Trautvain
Keyword(s):  
Asphalt Concrete ◽  
Production Management ◽  
Information Quality ◽  
Mechanical Characteristics ◽  
Concrete Pavement ◽  
Concrete Mixture ◽  
Qualitative Composition ◽  
Concrete Mixtures ◽  
Concrete Type ◽  
Asphalt Mix

the paper presents an analysis of information quality assurance of production of asphalt concrete mixtures, as well as the study of the relationship of the qualitative composition of asphalt concrete mixtures and physical and mechanical characteristics of asphalt concrete pavement. The study of the main characteristics was carried out on the example of asphalt concrete type B and grade I and crushed-mastic asphalt concrete – SchMA-20. It is established that the deviation of asphalt mixtures in composition from the required values leads to their under-compaction in the pavement. It is also established that increasing the number of inconsistencies in the asphalt concrete mixture leads to an increase of physical-mechanical characteristics that differ from the requirements of GOST 9128-2013 and GOST 31015-2002 respectively. As an information base for the assessment of the influence of granulometry of the mineral part of asphalt concrete, as well as the amount of bitumen on the main characteristics of asphalt concrete, the data of the current ACP of Belgorod region were used. Analysis of the particle size distribution was carried out using a laser analyzer of asphalt ABA7/35B. The obtained data became the basis for a further study of the influence of various parameters on the properties of asphalt mixes, as well as improving the efficiency of the asphalt mix production management system.

The Relationship of the Asphalt Mixtures Composition and Physical Mechanical Characteristics of the Coating

2019 ◽  
Vol 974 ◽  
pp. 31-36
Author(s):  
A.I. Trautvain ◽  
Evgeniy A. Yakovlev ◽  
V.A. Grichanikov ◽  
Ye.D. Potar'
Keyword(s):  
Asphalt Concrete ◽  
Work Performance ◽  
Mechanical Characteristics ◽  
Production Control ◽  
Production Quality ◽  
Concrete Mixtures ◽  
Asphalt Mix ◽  
Relationship Of ◽  
The Relationship ◽  
Physical And Mechanical Characteristics

In the course of the work performance the following surveys were carried out: the analysis of the information assurance of the asphalt concrete mixtures production quality, the study of the relationship between the composition of asphalt concrete mixtures and the physical and mechanical characteristics of the coating. This paper presents the results of the analysis of the two types asphalt concrete mixtures qualitative composition and its effect on the physical, mechanical and technological characteristics of the coating. It is established that the deviation of asphalt concrete mixtures in composition from the required values ​​leads to their under-compaction in the coating. It was also found that the increase in the number of inconsistencies in the composition of the asphalt concrete mixture leads to the increase in physical and mechanical characteristics that differ from the requirements of GOST 9128-2013 and GOST 31015-2002. The amount of bitumen on the asphalt concrete main characteristics, the data from the existing AP in the Belgorod Region were used as the information base in assessing the influence of granulometry of the asphalt concrete mineral part. Analysis of the particle size distribution was carried out using the laser analyzer for asphalt concrete AP 7 / 35B. The obtained data will be the basis for further study of the various parameters influence on the asphalt mixes properties, as well as improving the efficiency of the asphalt mix production control system.

scholarly journals MAIN PROBLEMS OF MANUFACTURING ASPHALT CONCRETE MIXTURES IN LITHUANIA/ASFALTBETONIO MIŠINIŲ GAMYBOS SVARBIAUSIOS PROBLEMOS LIETUVOJE

2000 ◽  
Vol 6 (1) ◽  
pp. 39-45
Author(s):  
Donatas Čygas
Keyword(s):  
Asphalt Concrete ◽  
High Speed ◽  
Statistical Data ◽  
Concrete Mixture ◽  
Cement Material ◽  
Asphalt Cement ◽  
Concrete Mixtures ◽  
Concrete Quality ◽  
Regressive Analysis ◽  
Speed Gradient

The article describes the main problems of manufacturing asphalt concrete mixtures at the factories under Ministry of Communication in the Republic of Lithuania. The Lithuanian Road Network is up to 21.122 km of state roads. 1.455 km of them are motorways, 3.415 km—national roads and 16.251 km—regional roads. Half of the state roads in Lithuania are paved with asphalt concrete. 98% of the motorways and 36% of the regional roads have asphalt pavement. Asphalt concrete pavement resistance to corrosion can be increased by improving asphalt concrete mixture production technology: ie by updating technological equipment, changing technological conditions and developing new methods of asphalt concrete mixture production. Therefore, the updating of asphalt concrete mixture production technologies is a very important factor for improving road operating properties and ensuring proper duration of asphalt concrete pavements. Here is the essence of the new separate successive technology: crushed stone and sand are mixed with bitumen in the main asphalt concrete mixer, the amount of bitumen being calculated according to the bitumen absorption in the materials. Then the asphalt cement material produced in a separate high-speed mixer is passed, and the whole mixture is remixed in the main mixer and supplied to the customer. Both separate consequent technologies differ from each other in the order of supplying asphalt cement material into the main mixing unit. Separate successive technology was theoretically grounded by the correlation between the technological thickness of bituminous film and the chemical-mineralogical composition and size of constituents, by the correlation between the particle size and their capability to compose aggregates, by the emergence of the oriented binding material coating on the technological bituminous film encoating mineral particles. Special attention is given to the manufacturing of asphalt cement material in a separate high-speed mixer (3 Table). It was theoretically grounded that mineral filler passing through the intensive shift zone between the paddle ends of the high-speed mixer and the walls of mixing chamber disintegrate and new active surfaces become visible. The molecular structure changes and free radicals appear. This intensive mixing guarantees high bitumen adsorption on the surface of mineral filler, which increases asphalt concrete resistance to corrosion and its durability, improves ecological environment in the asphalt concrete plant. In order to confirm the reliability of research results and explain correlative and regressive regularity, statistical data were processed applying statistical data processing programming system “STATGRAPHICS”. The linear regressive analysis for determining close relations of separate asphalt concrete quality indicators with speed gradient of asphalt cement material shift in a high-speed mixer was performed. Therefore, the possibility to change shift speed gradient from 3000 to 5000 1/s is provided in terms of reference for manufacturing asphalt concrete mixing plant. Correlation between separate asphalt concrete quality indicators and asphalt cement material shift speed gradient as well as bitumen amount in the asphalt cement material was determined by multi-dimensional regressive analysis of experimental data. The calculated correlation factor squared (R2) and F criteria indicate the adequacy and reliability of the multidimensional regression model.

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.

scholarly journals STUDY OF PHYSICAL-MECHANICAL PROPERTIES OF ASPHALT-CONCRETE SPECIMENS ON ACTIVATED MINERAL POWDERS OF VARIOUS COMPOSITIONS

2020 ◽  
pp. 44-50 ◽  
Author(s):  
Anna Trautvain ◽  
V. Yadykina ◽  
E. Mulenko
Keyword(s):  
Asphalt Concrete ◽  
Mechanical Characteristics ◽  
Raw Materials ◽  
Planetary Mill ◽  
Concrete Mixtures ◽  
Proportional Change ◽  
Different Temperatures ◽  
Mineral Powder ◽  
Mineral Core ◽  
Ferruginous Quartzites

the article presents the results of testing asphalt samples based on activated mineral powder from silica-containing raw materials. Activated filler was obtained by joint grinding of waste wet magnetic separation (WMS) of ferruginous quartzites of the Kursk Magnetic Anomaly in a spherical planetary mill in the presence of surfactants (stearic acid, adhesive additive Amdor-10) and bitumen. First of all, it should be noted that the use of activated mineral powder in the composition of asphalt concrete mixture led to an increase in the packing density of the composite. This was reflected not only in the technological process, but also contributed to the decrease in the porosity of the mineral core. It was found that the use of surfactants in the process of grinding mineral powder made it possible to increase the strength of asphalt concrete samples. However, the change in the crack resistance and shear resistance of asphalt concrete specimens, determined from the ratio of the corresponding compressive strengths, did not occur (table). This is due to the fact that there has been a proportional change in all the strength characteristics at different temperatures. Analysis of the physical-mechanical characteristics of the properties of asphalt concrete led to the conclusion that it was possible to use activated mineral powder from waste WMS as a component of asphalt concrete mixtures.

scholarly journals Variasi Kadar Filler Pada Campuran Beton Aspal Menggunakan Bahan Tambah Anti Stripping

2019 ◽  
Vol 16 (2) ◽  
pp. 76-83
Author(s):  
Eko Wiyono ◽  
Anni Susilowati
Keyword(s):  
Asphalt Concrete ◽  
Filler Content ◽  
Concrete Mixture ◽  
Testing Method ◽  
Concrete Mixtures ◽  
Dependent Variables ◽  
Optimum Variation ◽  
The Ideal

Filler function to fill cavities between aggregate granules which can affect the characteristics of asphalt concrete mixture. The purpose of this study is to obtain the characteristics of AC-WC asphalt concrete mixtures and determine the optimum variation of filler content on AC-WC asphalt concrete mixtures using cement fillers and anti-stripping additives that meet the specifications of Bina Marga 2010. ; 5.5%; 6%; 6.5%; 7%; 7.5%; and 8% each made with a variation of cement filler of 1%; 3%; 5%; 7%; and 9%; the addition of Wetfix Be 0.3% to the asphalt. The method of implementation is by mixing the wetfix Be first with asphalt, then aggregating according to the ideal mix gradation proportions. Dependent variables (research parameters) include density, percent cavity in aggregate (VMA), percent cavity filled with asphalt (VFB), percent cavity against mixture (VIM), stability, melt, and results for Marshall (MQ). Marshall testing method based on SNI 06-2489-1991. The results of the study obtained KAO in 1% cement filler variation; 3%; 5%; 7%; and 9%, each at 6.75%; 6.5%; 6.35%; 6.5% and 7.125%. KAO average of 6.65%. The range of cement filler levels which still meet the Marshall parameters at 2% cement filler up to 9%. The optimum cement filler content for asphalt concrete mixture is 5.5%, with a VMA value of 19.19%; VFB 77.12%; VIM 4.39%; Stability of 1670.48kg; melting 4.80mm, and MQ 349.78 kg / mm, meeting the specifications of Bina Marga 2010.

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.

DETERMINATION OF OPTIMUM QUANTITY OF BITUMEN IN ASPHALT CONCRETE MIXTURES

2002 ◽  
Vol 8 (1) ◽  
pp. 73-76
Author(s):  
Kęstutis Vislavičius
Keyword(s):  
Personal Computer ◽  
Asphalt Concrete ◽  
Concrete Mixture ◽  
Computer Programme ◽  
Narrow Fraction ◽  
Minimum Quantity ◽  
Concrete Mixtures ◽  
Optimum Quantity

The problem of calculating the quantity of a required bitumen is formulated as follows: from certain mineral materials the grading curves and narrow fraction bitumen receptivities which are known to determine the composition of an asphalt concrete mixture that satisfies grading limitations of mineral materials and contains minimum quantity of a required bitumen. Mathematical analogues of the problem are presented. A personal computer programme for calculating the minimum quantity of a required bitumen is prepared, and some example problems are solved. An analysis of the results is presented.

scholarly journals Asphalt concrete pavement reinforced with chemical fibers

2018 ◽  
Vol 216 ◽  
pp. 01013
Author(s):  
Viktor Lukashevich ◽  
Igor Efanov ◽  
Viktor Vlasov ◽  
Olga Lukashevich
Keyword(s):  
Natural Environment ◽  
Asphalt Concrete ◽  
Effective Means ◽  
Fiber Reinforcement ◽  
Concrete Pavement ◽  
Concrete Mixture ◽  
Experimental Production ◽  
Compaction Factor ◽  
Climatic Impacts ◽  
Asphalt Concrete Pavement

Asphalt concrete pavement which is currently built in accordance with the existing requirements does not withstand the standard service life. Various kinds of damages occur. Fiber reinforcement of asphalt concretes is one of the effective means to deal with deformations and fractures of road pavements, such as rutting, buckling, crack formation and shear. Chemical fibers serving as reinforcement are of great concern herein. The major purpose of this work was evaluation of reinforcement fibers resistance to natural environment and climatic impacts within the conditions of experimental production construction and studying compactibility of asphalt concrete mixture with fiber reinforcement. Infrared spectroscopy and physical-chemical investigations of fibers were used to study changing properties of fiber-forming polymer. Compactibility of asphalt concrete mixture with fiber reinforcement was determined upon compaction factor. Research results revealed insignificant influence of natural environment and climatic impacts on the properties of fiber reinforcement material. In order to obtain the standard compaction factor of asphalt concrete additional compacting impact is not required.

scholarly journals ENSURING THE DURABILITY OF THE ASPHALT CONCRETE COATING ON THE HARD BASIS OF ROADS

2021 ◽  
Vol 1 (48) ◽  
pp. 242-256
Author(s):  
Onyschenko A ◽  
◽  
Fedorenko O ◽  
Ianchuk L ◽  
◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Tensile Load ◽  
Theory Of Elasticity ◽  
Concrete Pavement ◽  
Concrete Mixture ◽  
Grain Composition ◽  
Scientific Publications ◽  
Track Formation ◽  
Asphalt Concrete Pavement

The article is devoted to the development of practical methods to ensure the durability of asphalt pavement on a rigid basis of roads. The goal of the work. Practical methods of ensuring the durability of asphalt pavement on a rigid basis of roads are proposed. The object of research is asphalt-concrete pavement on a hard base of highways. Research method: analytical-experimental using the provisions of the theory of elasticity and thermo-viscoelasticity and experimental methods of research of track formation in asphalt concrete pavement on a rigid basis; mathematical statistics; statistical analysis of scientific publications, technical and normative literature. The article presents the features of the design of grain warehouses of asphalt mixtures, namely: The proposed features of the design of grain warehouses of asphalt concrete, taking into account the rate of resistance to track formation; Requirements for designing the grain composition of asphalt concrete of high resistance to track formation with optimization in terms of estimated service life are proposed. The conducted researches allowed to develop a method of estimating the homogeneity from the time of transportation of the asphalt concrete mixture in the car body to the object according to the resistance of asphalt concrete to the formation of the track. Requirements for checking the flow rate in the crushed-mastic asphalt-concrete mixture due to the terms of its storage and transportation have been developed, which avoids segregation of the coating. The criterion of strength of asphalt concrete pavement on a rigid basis of the highway is improved due to the consideration of different time of action of tensile load at bending that will allow to design more precisely a covering of the increased durability. The technique of the minimum admissible temperature of consolidation of asphalt concrete mix at the device of a covering on a rigid basis of highways that will allow to provide durability of a covering is offered for practical application. KEY WORDS: ASPHALT CONCRETE, TRACK RESISTANCE, GRAIN COMPOSITION DESIGN, TEMPERATURE, TRANSPORTATION, SEALING

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