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Упит dcterms_subject_txt:green pellet testing

174 items

  • Effects of bentonite binder dosage on the properties of green limestone pellets

    Vladimir Jovanović, Dinko Knežević, Živko Sekulić, Milan Kragović, Jovica Stojanović, Slavica Mihajlović, Dragana Nišić, Dragan Radulović, Branislav Ivošević, Milan Petrov (2016)
    This paper presents the results of tests carried out to determine how the dosage of bentonite added as binder, affects the properties of green pellets made of the limestone fines that originate from Lithothamnium limestone processing. Bentonite was added to limestone in different mass fractions (1, 2.5, 5 and 10%), whereas all the other parameters of the pelletizing process remained constant. The aim of pelletizing was to consolidate limestone fines and form mechanically stable pellets, provided that all the ...
    Lithothamnium limestone, bentonite, pelletizing, pelletizing plate, green pellet testing

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... firewood-based and wood pellet-based. Firewood stoves are widely used in all Western Balkans countries, while wood- pellet appliances are less common [19]. However, the characteristic of the market of wood fuels in Serbia in the last decade has been the fast rate of growth in wood pellet consumption. The ...
    ... of firewood and wood pellet is not carbon neutral, i.e. it is assumed that the used wood has not been replaced by the newly planted one. Life Cycle Assessment of Individual wood Biomass Heating Systems in Households 433 Table 4. LCA of wood pellet-based HS - MBS PELLET [22], [23], [24] LC ...
    ... made. Over the use phase, wood pellet-based HS has a lower impact. This is due to the quantity of fuels and higher efficiency of the wood pellet-based HS which would have been used for heating according to the case scenario. In the waste treatment phase, wood pellet-based HS achieves more benefits ...

  • Characterization of pellet samples obtained by peletization of limestone and seaweed

    Vladimir Jovanović, Dejan Todorović, Branislav Ivošević, Dragan Radulović, Sonja Milićević, Dragana Nišić (2021)

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... occurs. The sample before and after testing is shown in Figure 17. σ σ σ σ (a) (b) σ σ Figure 17. Sample for cutting resistance testing in underwater coal mining conditions (a) before testing and (b) after testing. The presented modified cutting resistance testing procedure in underwater coal min- ...
    ... determined by the testing methodology that did not include the influence of surrounding water pressure at a certain depth of mining. According to the previous findings, it was necessary to develop a specific research and testing program that would involve appropriate laboratory testing of the geomechanical ...
    ... determined by the testing methodology that did not include the influence of surrounding water pressure at a certain depth of mining. According to the previous findings, it was necessary to develop a specific research and testing program that would involve appropriate laboratory testing of the geomechanical ...

  • Geomechnical research for the new bucket wheel excavator testing at Open pit “Filijala”

    Vladimir Čebašek, Nebojša Gojković, Veljko Rupar, Miodrag Pribićević (2020)
    Since 1976 cement marl excavation at open-pit mine „Filijala” is carried out by continuous exploitation technology using bucket wheel excavator SH 400 manufactured by Orenstein und Koppel (O & K) company. Due to the bucket wheel excavator time-worn and high operating cost it was necessary to replace it with new one. In order to test the new bucket wheel excavator and prove its capacity a testing zone was defined as test block for excavation, in which the bucket wheel ...
    отпор на копање, лапорац, роторни багер

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... 28 Such testing can be performed as an alternative to static CBR testing, particularly owing to the shorter duration of the CBR, test. Compared with classic CBR testing, CBR, has the advantage of not using a loading device, that is, a counterweight system as required for static testing (typically ...
    ... —) predicted from Eq. (4). Laboratory tests After evaluating the compaction properties of the tested material, CBR,,, testing was performed in the laboratory. The testing was performed by fixing the CBR attachment to the LWD device, and using a falling weight to induce a defined impact load ...
    ... Monitoring Technology for Unbound Materials, Report No. MN/RC-2007-10, Minnesota Department of Transportation (2007). 1. DIN 18154, “Soil – Testing procedures and testing equipment – Plate load test” (2012). 2. P. Salari, N. Hafezi, G. Reza Lashkaripour, and M. Ghafoori, “Presenting new models to determine ...

  • Testing and calibration of continuously operating belt weighers

    Aleksandrović Snežana, Jović Mihajlo (2011)

  • Quantity testing of the defects in aluminum plates using pulsed thermography

    Tomić Ljubiša, Damnjanović Vesna, Dikić Goran, Milanović Bojan, Bonžulović Boban (2014)

  • The Testing of Harmful gases using Passive Infrared Thermography

    Tomić Ljubiša, Damnjanović Vesna, Aleksandrović Snežana (2013)

  • Laboratory Testing and Simulation of the Paraffin Deposition in Turija Field Oil Well in Vojvodina Region, Serbia

    Danilović Dušan, Karović-Maričić Vesna, Šećerov Sokolović Radmila, Ivezić Dejan, Živković Marija (2011)

  • Application of Thermal Imaging in Surface Mining

    Milanka Negovanović (2022)
    Termalno snimanje se sve više koristi u rudarskoj industriji kao jedan od dijagnostičkih alata za praćenje određenih proizvodnih procesa, kao i stanja opreme i mašina. Predstavlja nedestruktivnu i beskontaktnu metodu ispitivanja koja omogućava rano otkrivanje problema, planiranje održavanja sa minimalnim kvarovima, sprečavanje neplaniranih poremećaja, posmatranje materijala u nepristupačnim ili opasnim područjima i poboljšanje bezbednosti i produktivnosti. Termalno snimanje koristi specijalizovane termalne kamere sa unutrašnjim detektorima koji identifikuju veoma male temperaturne varijacije i proizvode sliku tog nevidljivog infracrvenog ili toplotnog ...
    Termalno snimanje, nedestruktivne metode testiranja, površinska eksploatacija, termalne kamere, rudarske operacije

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... C to constant weight before testing. A constant mass is considered to have been reached when the difference between two consecutive weight measurements, performed at 24 ± 2 h intervals, is not greater than 0,1% of mass of test sample. After drying, and before testing, samples are stored at room ...
    ... Faculty of Civil Engineering, University of Belgrade, Serbia b Faculty of Mining and Geology, University of Belgrade, Serbia c Institute for testing materials IMS, Belgrade, Serbia d Unogradnja V.V. Belgrade, Serbia ABSTRACT The paper presents uniaxial compressive strength test according ...
    ... fire test. KEYWORDS Rock; Uniaxial compressive strength; Standard fire test. 1. INTRODUCTION Uniaxial compressive strength testing is a parameter that is determined experimentally. It depends on the structure of the rock mass, grain size and orientation, number and arrangement ...

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... tests (Figure 5). Minerals 2021, 11, 813 6 of 19 Figure 5. Composite specimens prepared for testing: (a) UCS, and (b) triaxial test. Nevertheless, UCS tests were performed on a hydraulic compression testing frame with sufficient pressure capacity and capable of applying a force perpendicular to the ...
    ... after placing the sample in the cell and connecting the manual confining pressure system (Figure 6b), the testing of rock material in triaxial conditions was performed. The UCS and triaxial testing duration ranged from 5–10 min, with a stress rate of 0.1–0.3 kN/s. The specimens were tested at room temperature ...
    ... results of uniaxial and triaxial compressive strength. The participation of altered dacite directly affects the mode and mechanism of failure during testing. Uniaxial compressive strength (σci UCS) and intact uniaxial compressive strength (σci TX) decrease exponentially with increased AD volumetric p ...

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... accordance with standard EN 12390-5 and testing was conducted on the prisms 400 mm in length, with a square cross-section sides of 100 mm. A digital hydraulic press “UTC-5600” (Utest, Ankara, Turkey) was used for the testing. A special tool was used for the testing permitting the loading of the sample by ...
    ... of the specimen at the start of testing. The difference in readings represented the variation in length of the tested sample, while shrinkage of the cement mortar was expressed as the ratio of length variation and the initial length of the sample at the start of testing. Mortar shrinkage εsm,i was calculated ...
    ... (crystal, structural, and textural properties) completely satisfied the criteria prescribed by the standard EN 450-1:2012. The physical–mechanical testing showed that slag does not possess pozzolanic activity, and this was solved by mixing the slag with silica fumess in minimal amounts (slag/silica fumes ...

  • Integrating landslide magnitude in the susceptibility assessment of the City of Doboj, using machine learning and heuristic approach

    Cvjetko Sandić, Miloš Marjanović, Biljana Abolmasov, Radislav Tošić (2023)
    In this work, landslide assessment of the Doboj City area was modeled by combining machine learning and heuristic tools. The machine learning part was used to map the Morphometric factor. i.e. probability of landslides based on relation between the magnitude of events and morphometric parameters: elevation, distance to streams, slope, profile curvature, and aspect. The Random Forest and Support Vector Machines algorithms were implemented in the learning protocol, which included several strategies: balancing of the training/testing set size, algorithm ...
    podložnost na kliženje, magnituda klizišta, mašinsko učenje, heuristički pristup, Doboj

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Examination and characterization of nanostructured Co0.9Ho0.1MoO4

    Милена Росић, Маја Милошевић, Мариа Чебела, Владимир Додевски, Весна Лојпур, Марија Васић, Александра Зарубица (2023)
    ... of crystal violet in an aqueous solution. After photocatalytic testing and all the above-mentioned characterizations, it was shown that these nanostructured materials represent promising solutions in photocatalytic processes toward green chemistry and sustainable development. Acknowledgment: These ...
    ... New Frontiers in Multifunctional Material Science and Processing Serbian Ceramic Society Institute of Technical Sciences of SASA Institute for Testing of Materials Institute of Chemistry Technology and Metallurgy Institute for Technology of Nuclear and Other Raw Mineral Materials PROGRAM AND ...
    ... New Frontiers in Multifunctional Material Science and Processing Serbian Ceramic Society Institute of Technical Sciences of SASA Institute for Testing of Materials Institute of Chemistry Technology and Metallurgy Institute for Technology of Nuclear and Other Raw Mineral Materials PROGRAM AND ...