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Justas Bražiūnas
Department of Transport Technological Equipment, Vilnius Gediminas Technical University, Plytinės g. 27, 10105 Vilnius, Lithuania

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Journal article
Published: 01 February 2018 in Construction and Building Materials
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ACS Style

Yuanchen Cui; Charles J. Glover; Justas Braziunas; Henrikas Sivilevicius. Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt. Construction and Building Materials 2018, 161, 132 -140.

AMA Style

Yuanchen Cui, Charles J. Glover, Justas Braziunas, Henrikas Sivilevicius. Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt. Construction and Building Materials. 2018; 161 ():132-140.

Chicago/Turabian Style

Yuanchen Cui; Charles J. Glover; Justas Braziunas; Henrikas Sivilevicius. 2018. "Further exploration of the pavement oxidation model – Diffusion-reaction balance in asphalt." Construction and Building Materials 161, no. : 132-140.

Journal article
Published: 25 October 2017 in Applied Sciences
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More and more recycled asphalt mixtures with high reclaimed asphalt pavement (RAP) content are used in road pavement. Having determined and evaluated RAP composition (aged bitumen content and aggregate gradation) and properties, a suitable recycling agent and virgin materials are selected in the design process. The gradation of hot mix asphalt (HMA) mixture that is recycled in an asphalt mixing plant (AMP) shall correspond to its optimal gradation set out in its job-mix formula (JMF). When RAP is recycled in an AMP, inevitable systematic and random errors of performed technological operations and inhomogeneity of virgin materials and RAP have a significant influence. These factors influence the variation of components quantities of recycled hot mix asphalt (RHMA) mixture and deviations from JMF. In this study, the principles of asphalt pavement hot recycling are systematized, which allows analysis of the factors of components’ interaction influencing the results of the recycling process. The paper also presents and analyses asphalt recycling technologies in AMP and their comparative analysis. During the season of asphalt mixture production in 2014, statistical parameters were calculated according to the data obtained from one of the companies, which collected and systematized RAP batch masses, when before batching it was pre-dried and pre-heated in an additional dryer. These parameters of batch mass and RAP content in RHMA position and variation were used when evaluating the accuracy and precision of the recycling process in AMP. The obtained data showed that when RHMA mixtures are produced in a modern batch-type AMP, RAP is batched accurately, but not precisely enough.

ACS Style

Henrikas Sivilevičius; Justas Bražiūnas; Olegas Prentkovskis. Technologies and Principles of Hot Recycling and Investigation of Preheated Reclaimed Asphalt Pavement Batching Process in an Asphalt Mixing Plant. Applied Sciences 2017, 7, 1104 .

AMA Style

Henrikas Sivilevičius, Justas Bražiūnas, Olegas Prentkovskis. Technologies and Principles of Hot Recycling and Investigation of Preheated Reclaimed Asphalt Pavement Batching Process in an Asphalt Mixing Plant. Applied Sciences. 2017; 7 (11):1104.

Chicago/Turabian Style

Henrikas Sivilevičius; Justas Bražiūnas; Olegas Prentkovskis. 2017. "Technologies and Principles of Hot Recycling and Investigation of Preheated Reclaimed Asphalt Pavement Batching Process in an Asphalt Mixing Plant." Applied Sciences 7, no. 11: 1104.

Journal article
Published: 03 April 2017 in Technological and Economic Development of Economy
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The asphalt pavement made of high quality materials and having the optimal composition best resists destructive effects of environmental factors and vehicles. The optimal content of the mineral materials of the asphalt mixture and a bituminous binder is selected employing calculation and experimental methods. The properties of the designed asphalt mixture must meet the requirements of technical specifications thus reducing its cost. The paper presents algorithms for simulating the composition of the asphalt mixture applying mathematical programming techniques. The algorithms allow designing the asphalt mixture with minimal bitumen content, a low cost of the mineral part and the densest gradation assessing technological requirements for producing the mixture. Optimal bitumen content is calculated considering bitumen capacities specified for different types of rock and determined employing the most recent standard sieves screening for narrow fractions. For verifying the new proposed algorithms, a numerical experiment on the materials most commonly used in asphalt mixing plants was done. The analysis of findings indicates that the application of the algorithms assist in comparing real results.

ACS Style

Henrikas Sivilevicius; Kęstutis Vislavičius; Justas Bražiūnas. TECHNOLOGICAL AND ECONOMIC DESIGN OF ASPHALT MIXTURE COMPOSITION BASED ON OPTIMIZATION METHODS. Technological and Economic Development of Economy 2017, 23, 627 -648.

AMA Style

Henrikas Sivilevicius, Kęstutis Vislavičius, Justas Bražiūnas. TECHNOLOGICAL AND ECONOMIC DESIGN OF ASPHALT MIXTURE COMPOSITION BASED ON OPTIMIZATION METHODS. Technological and Economic Development of Economy. 2017; 23 (4):627-648.

Chicago/Turabian Style

Henrikas Sivilevicius; Kęstutis Vislavičius; Justas Bražiūnas. 2017. "TECHNOLOGICAL AND ECONOMIC DESIGN OF ASPHALT MIXTURE COMPOSITION BASED ON OPTIMIZATION METHODS." Technological and Economic Development of Economy 23, no. 4: 627-648.

Journal article
Published: 10 July 2015 in JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
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An appropriate bitumen content and its properties in hot mix asphalt (HMA) mixture impact on the long-term mechanical strength of the laid asphalt pavement and the required road operation properties. During the production of a HMA mixture in an asphalt mixing plant (AMP), relationships between the structure and interaction of the mixture are established based on technological processes that specify bitumen batching and component mixing. These processes ensure the long-term strength, texture, evenness, the degree of damage and rheological properties of road pavement. The presented mathematical model enables us to determine the distribution of oxygen pressure by time in differently sized drops of bitumen during their fall into a mixer. The model considers oxygen diffusion, which depends on temperature, and heat conductivity, which depends on temperature, density and specific heat. An active experimental investigation under real production conditions demonstrated that the method of bitumen discharge from a batcher, temperature and time spent mixing materials with hot mineral aggregates impact on properties of bitumen binder within the produced HMA mixture. Parameters of technological processes for mixing of bitumen with mineral aggregates that occur in a bitumen batching system (BBS) are stochastic and impact on the composition of bitumen binder as well as physical and mechanical properties of the produced HMA mixture, namely, air void content, stability, flow and Marshall quotient.

ACS Style

Justas Bražiūnas. INVESTIGATION INTO TECHNOLOGICAL PARAMETERS OF BITUMEN BATCHING IN AN ASPHALT MIXING PLANT. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2015, 21, 958 -965.

AMA Style

Justas Bražiūnas. INVESTIGATION INTO TECHNOLOGICAL PARAMETERS OF BITUMEN BATCHING IN AN ASPHALT MIXING PLANT. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2015; 21 (7):958-965.

Chicago/Turabian Style

Justas Bražiūnas. 2015. "INVESTIGATION INTO TECHNOLOGICAL PARAMETERS OF BITUMEN BATCHING IN AN ASPHALT MIXING PLANT." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 21, no. 7: 958-965.

Conference paper
Published: 01 January 2014 in The 9th International Conference "Environmental Engineering 2014"
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ACS Style

Justas Bražiūnas; Henrikas Sivilevičius. Heat Transfer and Energy Loss in Bitumen Batching System of Asphalt Mixing Plant. The 9th International Conference "Environmental Engineering 2014" 2014, 1 .

AMA Style

Justas Bražiūnas, Henrikas Sivilevičius. Heat Transfer and Energy Loss in Bitumen Batching System of Asphalt Mixing Plant. The 9th International Conference "Environmental Engineering 2014". 2014; ():1.

Chicago/Turabian Style

Justas Bražiūnas; Henrikas Sivilevičius. 2014. "Heat Transfer and Energy Loss in Bitumen Batching System of Asphalt Mixing Plant." The 9th International Conference "Environmental Engineering 2014" , no. : 1.

Journal article
Published: 24 December 2013 in JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT
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Bitumen holds the aggregate in hot mix asphalt (HMA). Without asphalt binder, HMA would simply be crushed stone or gravel. A bitumen batching system (BBS) is comprised of bitumen storage, transportation, weighing and discharge equipment in an asphalt mixing plant (AMP). The function of the equipment is to batch the binder heated up to working temperature and to discharge it into a mixer in batches. In the entire system, the binder is exposed to high temperature and oxygen. Bitumen is slowly oxidized when it is in contact with oxygen. The degree of oxidation is highly dependent on temperature, time and thickness of a bitumen film. This article models the key factors influencing on the dynamics of bitumen oxidation in BBS equipment. Stone mastic asphalt (SMA) mixture was produced from the same materials according to the same job-mix formula (JMF) in neighbouring batch type AMP by changing the mixing time of materials from 20 to 60 s. Bitumen binder was separated from the taken SMA samples and its gradation was identified. Thus, Marshall specimens were produced and tested. Penetration Pen25 of bitumen binder recovered in rotary evaporator, softening point Tsp was determined and penetration index Ip was calculated. The presented findings of experimental investigation show that the properties of bitumen binder in BBS working at two different technologies changed inconsistently. Due to gravitation, the bitumen intensively flowing into a mixer (BBS1) is impacted by oxidation more than the bitumen batched by a high-pressure pump (BBS2).

ACS Style

Justas Bražiūnas; Henrikas Sivilevičius; Romualdas Virbickas. DEPENDENCES OF SMA MIXTURE AND ITS BITUMINOUS BINDER PROPERTIES ON BITUMEN BATCHING SYSTEM, MIXING TIME AND TEMPERATURE ON ASPHALT MIXING PLANT. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2013, 19, 862 -872.

AMA Style

Justas Bražiūnas, Henrikas Sivilevičius, Romualdas Virbickas. DEPENDENCES OF SMA MIXTURE AND ITS BITUMINOUS BINDER PROPERTIES ON BITUMEN BATCHING SYSTEM, MIXING TIME AND TEMPERATURE ON ASPHALT MIXING PLANT. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2013; 19 (6):862-872.

Chicago/Turabian Style

Justas Bražiūnas; Henrikas Sivilevičius; Romualdas Virbickas. 2013. "DEPENDENCES OF SMA MIXTURE AND ITS BITUMINOUS BINDER PROPERTIES ON BITUMEN BATCHING SYSTEM, MIXING TIME AND TEMPERATURE ON ASPHALT MIXING PLANT." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 19, no. 6: 862-872.

Journal article
Published: 31 December 2010 in Mokslas - Lietuvos ateitis
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The weighted mass of a binder in the bucket of the bitumen batcher of a batch-type asphalt plant should be such that its percentage of hot mix asphalt (HMA) mixture lot would comply with the design amount of the job-mix formula in all mix batches. A bitumen batcher does not always weigh bitumen portions precisely. Their mass deviations from the amount determined by the project and its variation impair HMA composition and performance. The paper provides data on a statistical evaluation of bitumen batcher modernization performed at Lithuanian enterprise „LL“. The article analyzes differences in the structures of reconstructed and not reconstructed bitumen batching systems and presents methods for determining modernization effectiveness. The paper also focuses on the effectiveness of the batching system, determining deviations from bitumen content in subsamples taken and extracted everyday during two seasons (before and after batcher‘s modernization) of producing HMA from the value of job-mix formula and comparing them to the values of tolerances.

ACS Style

Justas Bražiūnas; Henrikas Sivilevicius. ANALYSIS OF THE INFLUENCE OF THE MODERNIZED BITUMEN BATCHING SYSTEM ON THE COMPOSITION OF THE HOT MIX ASPHALT MIXTURE. Mokslas - Lietuvos ateitis 2010, 2, 72 -76.

AMA Style

Justas Bražiūnas, Henrikas Sivilevicius. ANALYSIS OF THE INFLUENCE OF THE MODERNIZED BITUMEN BATCHING SYSTEM ON THE COMPOSITION OF THE HOT MIX ASPHALT MIXTURE. Mokslas - Lietuvos ateitis. 2010; 2 (6):72-76.

Chicago/Turabian Style

Justas Bražiūnas; Henrikas Sivilevicius. 2010. "ANALYSIS OF THE INFLUENCE OF THE MODERNIZED BITUMEN BATCHING SYSTEM ON THE COMPOSITION OF THE HOT MIX ASPHALT MIXTURE." Mokslas - Lietuvos ateitis 2, no. 6: 72-76.

Journal article
Published: 30 September 2010 in Transport
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Some particular aspects such as the improvement methods of technological parameters for hot bitu‐ men storage in a pipeline transport system, transportation and dosed supply to batch asphalt mixing plant (AMP) are evaluated in this paper. Bitumen in asphalt concrete binds together the material of mineral particles into a strong conglomerate of a complicated structure, capable of withstanding the destructive effect of vehicles and the factors on the road pavements. The optimal amount of bitumen determined by calculation and laboratory testing should be maintained in mix batches of hot‐mix asphalt (HMA) obtained from AMP mixer. In the periodic type of the asphalt concrete blender mass of the weighted matrix in the all merging batcher's tanks should correspond in percents equally in the HMA to the designed amount of the job‐mix formula (JMF). The bitumen batcher does not always weigh bitumen portions precisely. Their mass deviations from the amount determined by JMF and its variation impair HMA composition and performance. In addition,, an additive model for calculating the effect of factors causing the variance of bitumen content in the produced HMA mixture is presented in this current paper as well. The data on statistical evaluation of bitumen batcher's modernization performed at certain Lithuanian Enterprise are discussed. The differences in structures of reconstructed and not reconstructed bitumen batching systems (BBS) are analysed and methods of determining modernization effectiveness are presented. The effectiveness of BBS is analysed too, defining the deviations of bitumen content in subsamples, taken and extracted everyday for two seasons (before and after the batcher's modernization) of HMA mixture production from the value of JMF and comparing them to the values of tolerances. The analysis of column charts and histograms shows that the made modernization helped to increase the precision of supplying the required amount of bitumen to HMA mixture insignificantly. However, the control of BBS has been considerably increased.

ACS Style

Justas Bražiūnas; Henrikas Sivilevičius. THE BITUMEN BATCHING SYSTEM'S MODERNIZATION AND ITS EFFECTIVE ANALYSIS AT THE ASPHALT MIXING PLANT. Transport 2010, 25, 325 -335.

AMA Style

Justas Bražiūnas, Henrikas Sivilevičius. THE BITUMEN BATCHING SYSTEM'S MODERNIZATION AND ITS EFFECTIVE ANALYSIS AT THE ASPHALT MIXING PLANT. Transport. 2010; 25 (3):325-335.

Chicago/Turabian Style

Justas Bražiūnas; Henrikas Sivilevičius. 2010. "THE BITUMEN BATCHING SYSTEM'S MODERNIZATION AND ITS EFFECTIVE ANALYSIS AT THE ASPHALT MIXING PLANT." Transport 25, no. 3: 325-335.

Monograph
Published: 01 January 2010 in Transporto sistemos elementai
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ACS Style

Šarūnas Šukevičius; Lijana Maskeliūnaite; Justas Bražiūnas. Transporto sistemos elementai. Transporto sistemos elementai 2010, 1 .

AMA Style

Šarūnas Šukevičius, Lijana Maskeliūnaite, Justas Bražiūnas. Transporto sistemos elementai. Transporto sistemos elementai. 2010; ():1.

Chicago/Turabian Style

Šarūnas Šukevičius; Lijana Maskeliūnaite; Justas Bražiūnas. 2010. "Transporto sistemos elementai." Transporto sistemos elementai , no. : 1.