Претрага
95 items
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Mineral bakerite as a cement in faukt breccia in diabase (Mrčići, Divčibare)
Vasić Nebojša, Simić Đorđe, Simić Vladimir, Dabić Predrag, Erić Suzana, Brčeski Ilija, Gajić Violeta, Vulić Predrag (2014)Vasić Nebojša, Simić Đorđe, Simić Vladimir, Dabić Predrag, Erić Suzana, Brčeski Ilija, Gajić Violeta, Vulić Predrag. "Mineral bakerite as a cement in faukt breccia in diabase (Mrčići, Divčibare)" in Proceedings of the XVI Serbian Geological Congress (National Congress with International Participation), Donji Milanovac, Srbija:Srpsko geološko društvo (2014): 234-235
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Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy
Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)... amount of isopachous, radiaxial, fibrous calcite cement arranged in concentric bands (Figs 5/5– 6). The cement is characterized by several generations of growth bands and contains small trapped organic matter inclusions. Parts of large cement were broken-up and were found floating in the matrix ...
... particles (Figs 5/3-4). Pri- mary cavities are common and lined by isopachous marine cement followed by late cavity-filling: blocky calcite, and occasionally, late saddle dolomite. Abundant radiaxial fibrous calcite cement (RFC) was also found in the grainstone facies (Fig. 5/2). In some samples, ...
... radiaxial fibrous cement, pc: peloidal clots, sf: shell fragments, c: coral, eb: encrusting bivalve? Sample: 1 – Gy54;2 – Gy61; 3 – Gy62; 4 – Gy58, scale bars in all samples are 10 mm. 5-6) “evinospongiae”-like factes (MF6), Wbipbytes, on: oncoid nucleus, RFC: radiaxial fibrous cement, bs: broken-up ...Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag. "Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy" in Rivista Italiana di Paleontologia e Stratigrafia (2014)
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Sedimentologija gornje krede centralnog dela vardarske zone
Violeta M. Gajić (2014-09-04)Područje istraţivanja obuhvaćeno doktorskom disertacijom nalazi se ucentralnim delovima Vardarske zone. Karakteriše se sloţenom geološkomgrađom koju grade mezozojske tvorevine trijaske, jurske i kredne starosti, kao ikvartarni sedimenti. U trijasu je istraţivano područje pokrivalo more, sve dogranice sa Šumadijom. Tokom jure sloţenim geotektonskim procesima stvarajuse ofiolitske stene rasprostranjene u juţnim i delom u centralnim delovimaistraţivanog područja. U donjoj kredi se pokretima dinarske faze izdiglo kopno,koje je egzistiralo skoro u celoj donjoj kredi područja istraţivanja.U alb-cenomanu pojedini delovi istraţivanog područja se ...... sastava. Sparitski cement u intergranularnim porama krečnjaka najčešće je mozaičnog tipa i ponekad se nalazi u komoricama fosila na mestu otopljenog primarnog aragonita (Slika 6.16). Čest kalcitski cement u ovim krečnjacima je i vlaknasti (fibrozni) cement. Fibrozni kalcitski cement je ranodijagenetski ...
... dimenzija (Slika 6.17). To je glavni tip cementa u grainstone mikrofacijama kao krečnjacima tipa „stena plaţa“ (Tucker 2001). Osim ovih tipova cementa oko fragmenata korala iz ovih stena raste i sintaksijalni tip cementa (Slika 6.18). Sintaksijalni cement je karakterističan za ranodijagenetsku ...
... krečnjacima (Slika 8.5). Kalcitski cement u ovim krečnjacima je sparit. Ne retko, oko fragmenata skeleta fosila raste sintaksijalni cement (Slika 8.5), dok oko odlomaka stena raste fibrozni kalcitski cement (Slika 8.6). Ovi ranodijagenetski tipovi cementa karakteristični su za submarinske grainstone ...Violeta M. Gajić. Sedimentologija gornje krede centralnog dela vardarske zone, Универзитет у Београду, Рударско-геолошки факултет, 2014-09-04
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Geomechnical research for the new bucket wheel excavator testing at Open pit “Filijala”
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 ...Vladimir Čebašek, Nebojša Gojković, Veljko Rupar, Miodrag Pribićević. "Geomechnical research for the new bucket wheel excavator testing at Open pit “Filijala”" in Рударски гласник, Рударски институт - Београд (2020). https://doi.org/10.25075/BM.2020.07
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Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS
Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan. "Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS" in X Međunarodna konferencija UGALJ, Zlatibor, Srbija, 13-16. Oktobar 2021., Jugoslovenski komitet za površinsku eksploataciju (2021)
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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... alkali metals (Hua etf al., 2016; Walawalkar et al., 2016). The commercial use of phosphogypsum in the areas of agricul- ture, road construction, the cement industry and the manufactur- ing processes of other building materials is limited by the presence of the significant quantities of natural radionuclides ...
... purified gypsum. This increase in the WI benefits the potential use of recrystallized phosphogypsum in various industries. For example, in the Serbian cement indus- try, A-grade cements should have WI values >80%, so for gypsum to be used as one of the components of A-grade cements, it must comply with ...
... (2016) Developing high performance phosphogypsum- based cementitious materials for oil-well cementing through a step-by-step optimization method. Cement and Concrete Composites, 72, 299-308. IAEA (2013) Radiation Protection and Management of NORM Residues in the Phosphate Industry. Safety Reports ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11
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Strukture kristala - odabrana poglavlja iz kristalografije i njena multidisciplinarnost
Ljiljana Karanović (2024)Ljiljana Karanović. Strukture kristala - odabrana poglavlja iz kristalografije i njena multidisciplinarnost, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet, 2024
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Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)
Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović. "Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)" in Materials, MDPI AG (2024). https://doi.org/10.3390/ma17040820
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English for Geology Students. 2
Lidija Beko (2023)... which can serve different purposes: energy (fossil fuels, uranium), construction and industry (aggregates, clays for brick / tile, carbonates for cement), metals. Igneous and magmatic deposits As the contents of a magma chamber begin to cool, particularly in the case ofbasaltic magmas, which ...Lidija Beko. English for Geology Students. 2, Belgrade : The Faculty of Mining and Geology, 2023
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Петрологија црвених пешчара источне Србијe
Андреј Марковић (2024)У источној Србији формација црвених пешчара има велико распрострањење и улази у састав многих планина овог дела наше земље. Формацију чине кластичне стене интензивно црвене боје псамитске, ређе псамитско-псефитске структуре и алевритске структуре. Ове стене леже трансгресивно преко старијих пермо-карбонских и карбонских стена, док навише прелазе у доњотријаске седименте. Формација црвених пешчара захвата два појаса унутар Карпато-балканида – унутрашњи и средишњи део. Узорци анализирани у овом раду део су средишњег појаса. Тема завршног рада је петрологија црвених пешчара источне ...... degree of roundness and sorting, they are determined as fine-grained medium-sorted sandstones-siltstone- psammitic structure. The binder is calcite cement and clayey-ferrous matrix. The color of the rocks is distinctly red conditioned by presence of iron minerals. Key words: Kasfern Serbia, red sandstone ...Андреј Марковић. Петрологија црвених пешчара источне Србијe, 2024
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...... the period when Belgrade was under Turkish rule (Fotić 2008, 2009). Small interventions done in the past are notable on the facades. Traces of cement mortar are visible. The research was carried out for the first time in 1965 with the aim of obtaining information on the gate”s state of conservation ...
... intra/biosparrudites. Terrigene components are presented of uniformly distributed quartz/quarzite grains and it built up to 10–15 % vol. rock. The cement is sparite pigmented with iron oxides. Rudstone microfacies have an intergranular and intragranular porosity. The results of lithological mapping ...
... rising velocity of decay pro- cesses. All of these sources of moisture/water caused dissolution of poorly cemented algal rudstone and sparite cement of grainstone. It resulted in crumbling, granular disintegration, or occurring of thin white crust on stone surface as consequence of redeposited ...Maja Franković, Nevenka Novaković, Vesna Matović. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s12665-014-3843-z
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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)... psammitic texture. It is made of quartz clast, fragments of rock minerals and mica (muscovite and chlorite) which are bound with a limonite clay cement. Quartz clusters dominate, building about 60% of the rock mass. They occur in grains of different sizes, from 0.05 to 0.5 mm. The grains are mostly ...Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović. "Uniaxial compressive strength test before and after standard fire test on rock mass" in Fifth symposium of the Macedonian Association for Geotechnics, Ohrid, North Macedonia, 23-25. 06. 2022, Macedonian Association for Geotechnics (2022)
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Smanjenje sleganja plitkih temelja primenom mikrošipova
Slobodan Ćorić, Dragoslav Rakić (2021)Mikrošipovi su šipovi malog prečnika koji se grade tako što se u tlu specijalni postupkom formira bušotina koja se zatim armira i injektira. Njihov prečnik je najčešće 150 – 300 mm, a dužina može da bude i više desetina metara. Mikrošipovi mogu da se grade u svim vrstama tla i mogu da budu vertikalni i kosi. Oni se, stoga, koriste kao zamena za konvencionalne šipove i ankere. Primena mikrošipova u fundiranju predstavlja jedan savremeni način izgradnje i sanacije temelja/objekata. ...Slobodan Ćorić, Dragoslav Rakić. "Smanjenje sleganja plitkih temelja primenom mikrošipova" in Zbornik radova međunarodno naučno-stručnog savetovanja Zemljotresno inženjerstvo i geotehnički aspekti građevinarstva, Vrnjačka banja, 3-5. novembar 2021., Beograd : Savez građevinskih inženjera Srbije (2021)
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Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
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Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii... etc. [12]. Therefore, isolation of these bacteria was performed from areas rich in carbonate rocks such as mines [4], soils [13], landfills [14], cement matrix [15], sand [16], active sludge from wastewater treatment [17], etc. However, most research studies are focused on MICP applications as well ...
... as civil engineering, bioremediation, and biotechnological applications, geotechnical and ecological engineering, bio-based solution for soil, sand, cement-based matrix, etc. Supplementary Materials: The supplementary materials are available online at https://www.mdpi. com/article/10.3390/microorgani ...
... Microb. Biotech. 2003, 62, 191–201. [CrossRef] [PubMed] 15. Achal, V.; Siddique, R.; Reddy, M.; Mukherjee, A. Improvement in the compressive strength of cement mortar by the use of a microorganism—Bacillus megaterium. In Proceedings of the International Conference, Concrete Construction; Excellence in Concrete ...Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691
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Минерагенија зеолитских туфова Србије
Vladan Kašić (2018-02-05)Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...... 35 ст. Радојевић Ј., Стојановић В., Живановић М., Јовичић Р., (1996): Зеолитски туф – лежиште у оквиру беочинске фабрике цемента, Зборник радова II међ. Саветовања ЦЕМЕНТ '96, 198-204. Радојевић Ј., Дедић Љ. (1995): Елаборат о квалитету и резервама туфа лежишта „Опћиште“ код Беочина. Геозавод ...
... Топоница код Косовске Каменице први пут је истраживан 1957. године (Атанацковић и Стипановић, 1957) од када се и користи као "бели" туф у индустрији цемента, као пуцолан – адитив цементном клинкеру. Током 1969. и 1970. године зеолитски туф је испитиван као сировина за производњу грађевинских блокова ...
... изостаје или је веома ниског интензитета. Такви туфови су коришћени у цементној индустрији као додатак цементном клинкеру. Тако су за потребе фабрике цемента Беочин откривене и истраживане и појаве туфова које се простиру на северним падинама Фрушке Горе у виду једне зоне од села Буковца на истоку, преко ...Vladan Kašić. "Минерагенија зеолитских туфова Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-02-05)
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Mesozoic carbonate rocks in Serbia used as dimension stone
Vesna Matović, Tijana Vojnović Ćalić (2016)The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...... of the column and it is characterised by unsorted and densely packed bioclasts (up to ! mm), rare intraclasts and oncoids arranged in sparitic cement. Dominant red nodular limestone, allochemmicrite (Packstone and Wa- ckestone microfacies), builds the second and the third package of the column ...
... characterized by lower compressive strength values and slightly higher water absorption values due to the presence of microfacies with sparitic cement as well as stylolites. Discussion The petrographic, physical, and mechanical properties of Serbian Mesozoic carbonate rocks were examined within ...Vesna Matović, Tijana Vojnović Ćalić. "Mesozoic carbonate rocks in Serbia used as dimension stone" in Bulletin of Engineering Geology and the Environment, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s10064-015-0722-0
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Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)
Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...Nevenka Novaković, Predrag Dabić, Vesna Matović. "Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10794-6
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Remontni radovi u bušotini sa dubinskom pumpom
Jovana Milošević (2024)Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...... menja dubina proizvodnog intervala. (Soleša M. , 1996) Tekući radovi: - Ugrađivanje ı vađenje dubinske pumpe, zamena i deparafinaža tubinga, spasavanje uređaja za kracovanje, zamena dotrajalih delova dubinske pumpe i slomljenih klipnih šipki, čišćenje bušotina od peska. (Kovinčić Milan, 2014) ...
... sklopa, perforiranjem proizvodnog intervala, osvajanjem — zamenom težeg radnog fluida lakšim, gušenjem bušotine i dalje izvršavanjem operacija redosledom po programu. Kod proizvodnih bušotina remontni proces započinje gušenjem bušotine, zamenom erupcionog uređaja preventerskim sklopom. (Kovinčić Milan ...
... zaključka o uzroku smanjenja. Pad 21 proizvodnje može da bude rešen zamenom bušotinske opreme, ali ako Je dinamički pritisak ipak visok a manja proizvodnja rešenje bi bilo pročišćavanje niza tubinga u eruptivnim bušotinama ili zamena oštećenog sistema za mehaničku metodu eksploatacije (neispravna ...Jovana Milošević . Remontni radovi u bušotini sa dubinskom pumpom, 2024
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Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world
Bogoljub Vučković, Bojan Dimitrijević (2023)The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...... 2, RUDNIK | Coal, KOSTOLAC FI u Smelting Plant, BOR Hall Pioneer, BELGRADE G Rudniki,RUDNIK Urban center, BELGRADE i Rudnik 1, RUDNIK BFC Lafarge Cement, BEOCIN 1 StudentsPark, BELGRADE — KosutnjakPark,BELGRADE ž Rudnik 2, RUDNIK il Rafinery, PANCEVO e Fefoundry,KIKINDA I Coal, KOSTOLAC |H Ada Ciganlija ...Bogoljub Vučković, Bojan Dimitrijević. "Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world" in 9th International Conference Mining and Environmental Protection, 24–27. May 2023, Sokobanja, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)