TY  - JOUR
AU  - Vlahović, Milica
AU  - Boljanac, Tamara
AU  - Branković, Anđelka
AU  - Vidojković, Velislav M.
AU  - Martinović, Sanja
AU  - Đorđević, Nataša
PY  - 2010
UR  - https://ritnms.itnms.ac.rs/handle/123456789/173
AB  - U radu je ispitana koroziona otpornost sumpornog betona u uslovima različitih hemijski agresivnih sredina. Polazne komponente za dobijanje sumpornog betona bile su agregat definisanog sastava, modifikovano sumporno vezivo i različiti punioci (talk, glinica, mikrosilika i elektrofilerski pepeo). Ispitivanje materijala na otpornost u agresivnim sredinama i to u 20% H2SO4, 10% HCl i 3% NaCl na sobnoj temperaturi praćeno je promenom mase i čvrstoće sumpornog betona u trajanju do 360 dana. Rezultati su pokazali da uzorci sumpornog betona sa elektrofilterskim pepelom i talkom imaju bolju korozionu otpornost u kiselim sredinama u odnosu na betone sa glinicom i mikrosilikom. Svi uzorci imaju izuzetnu korozionu otpornost u rastvorima NaCl, pri čemu su najbolji uzorci sa talkom kao puniocem. Radi poređenja, praćena je i otpornost klasičnog portland cementnog betona u istim sredinama.
AB  - Sulfur concrete was prepared by using the initial components: sand as an aggregate, modified sulfur binder, and talc, alumina, microsilica, and fly ash as fillers. Portland cement concrete was made from the same aggregate and fillers and portland cement. The durability of the prepared concrete samples was tested in the following aggressive solutions: 10% HCl, 20% H2SO4, and 3% NaCl as a function of time. Changes in mass and strength of the sulfur concrete were monitored periodically during the immersion time of 360 days in above solutions. These changes were used as a measure of deterioration level. It should be highlighted that the samples with the ash and especially talc exhibit higher durability in the solutions of HCl and H2SO4 than the samples with alumina and microsilica. In the solutions of NaCl all samples have shown excellent durability while the samples with talc were the best. Portland cement concrete samples lost 20% of mass after two months and showed degradation of mechanical properties. By usage of sulfur for sulfur concrete production, a huge environmental problem regarding storage of waste sulfur from oil refining processes is solved. On the other hand, sulfur concrete with its low price has an excellent quality for the application in aggressive environments unlike the more expensive PCC.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Uticaj vrste punioca na korozionu otpornost sumpornog betona
T1  - The influence of filler type on the corrosion stability of the sulfur concrete
EP  - 137
IS  - 2
SP  - 129
VL  - 64
DO  - 10.2298/HEMIND090918001V
UR  - conv_584
ER  - 

@article{
author = "Vlahović, Milica and Boljanac, Tamara and Branković, Anđelka and Vidojković, Velislav M. and Martinović, Sanja and Đorđević, Nataša",
year = "2010",
abstract = "U radu je ispitana koroziona otpornost sumpornog betona u uslovima različitih hemijski agresivnih sredina. Polazne komponente za dobijanje sumpornog betona bile su agregat definisanog sastava, modifikovano sumporno vezivo i različiti punioci (talk, glinica, mikrosilika i elektrofilerski pepeo). Ispitivanje materijala na otpornost u agresivnim sredinama i to u 20% H2SO4, 10% HCl i 3% NaCl na sobnoj temperaturi praćeno je promenom mase i čvrstoće sumpornog betona u trajanju do 360 dana. Rezultati su pokazali da uzorci sumpornog betona sa elektrofilterskim pepelom i talkom imaju bolju korozionu otpornost u kiselim sredinama u odnosu na betone sa glinicom i mikrosilikom. Svi uzorci imaju izuzetnu korozionu otpornost u rastvorima NaCl, pri čemu su najbolji uzorci sa talkom kao puniocem. Radi poređenja, praćena je i otpornost klasičnog portland cementnog betona u istim sredinama., Sulfur concrete was prepared by using the initial components: sand as an aggregate, modified sulfur binder, and talc, alumina, microsilica, and fly ash as fillers. Portland cement concrete was made from the same aggregate and fillers and portland cement. The durability of the prepared concrete samples was tested in the following aggressive solutions: 10% HCl, 20% H2SO4, and 3% NaCl as a function of time. Changes in mass and strength of the sulfur concrete were monitored periodically during the immersion time of 360 days in above solutions. These changes were used as a measure of deterioration level. It should be highlighted that the samples with the ash and especially talc exhibit higher durability in the solutions of HCl and H2SO4 than the samples with alumina and microsilica. In the solutions of NaCl all samples have shown excellent durability while the samples with talc were the best. Portland cement concrete samples lost 20% of mass after two months and showed degradation of mechanical properties. By usage of sulfur for sulfur concrete production, a huge environmental problem regarding storage of waste sulfur from oil refining processes is solved. On the other hand, sulfur concrete with its low price has an excellent quality for the application in aggressive environments unlike the more expensive PCC.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Uticaj vrste punioca na korozionu otpornost sumpornog betona, The influence of filler type on the corrosion stability of the sulfur concrete",
pages = "137-129",
number = "2",
volume = "64",
doi = "10.2298/HEMIND090918001V",
url = "conv_584"
}

Vlahović, M., Boljanac, T., Branković, A., Vidojković, V. M., Martinović, S.,& Đorđević, N.. (2010). Uticaj vrste punioca na korozionu otpornost sumpornog betona. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 64(2), 129-137.
https://doi.org/10.2298/HEMIND090918001V
conv_584

Vlahović M, Boljanac T, Branković A, Vidojković VM, Martinović S, Đorđević N. Uticaj vrste punioca na korozionu otpornost sumpornog betona. in Hemijska industrija. 2010;64(2):129-137.
doi:10.2298/HEMIND090918001V
conv_584 .

Vlahović, Milica, Boljanac, Tamara, Branković, Anđelka, Vidojković, Velislav M., Martinović, Sanja, Đorđević, Nataša, "Uticaj vrste punioca na korozionu otpornost sumpornog betona" in Hemijska industrija, 64, no. 2 (2010):129-137,
https://doi.org/10.2298/HEMIND090918001V .,
conv_584 .

TY  - JOUR
AU  - Branković, Anđelka
AU  - Tešmanović, Ljiljana
AU  - Zildžović, Snežana
AU  - Kovačević, Dragana
AU  - Ileš, Deana
PY  - 2007
UR  - https://ritnms.itnms.ac.rs/handle/123456789/111
AB  - Arsen se pojavljuje kao prateći element sulfidnih ruda ležišta gvožđa, olova i drugih metala. Njegovo prisustvo u rudama je katkad u dovoljnim količinama da je ekonomski opravdano razmišljati o njegovoj eksploataciji. Kao toksičan element i u veoma malim količinama degradira kvalitet rude, na primer olovo-cinkane rude ili rude zeolita. U mnogim geološko-geohemijskim sistemima je prisutan arsen, koji predstavlja rizik za kvalitet životne sredine. Ispitivan je uticaj različitih postupaka hemijskog razlaganja uzorka mineralne sirovine na određivanje arsena, metodom AAS-MHS, sa ciljem da se na bazi eksperimentalnih rezultata, odabere najoptimalniji. Postupak treba da omogući efikasno hemijsko razlaganje uzorka, odnosno transformaciju iz čvrstog u tečno i potpunu jonizaciju migrirajućeg atoma ili jona arsena, što predstavlja osnovu za njegovo kvantitativno određivanje. U eksperimentima je korišćen prirodni zeolit i njemu identična po hemijskom sastavu napravljena smeša (kao referentni materijal) sa određenom koncentracijom arsena. Najoptimalniji način hemijskog razlaganja može, prioritetno i uspešnije, da se primeni i na druge mineralne sirovine i jalovine u koji ma se određuje arsen.
AB  - Arsenic occurs as a concomitant element of sulfide iron, lead and other metallic ores. The presence of arsenic in ores is sometimes in the quantities sufficient to be economically feasible. As a toxic element, even in the small quantities, arsenic degrades the quality of the ore, for example the lead-zinc or zeolite ore. Moreover, the arsenic is present in many geological-geochemical systems, representing the considerable risk for the quality of the environment. The objective of this paper is to present the results of the investigation aimed to evaluate the influence of different procedures applied for chemical destruction of mineral raw material on arsenic determination, using AAS-MHS method and selection of the optimal sample preparation procedure. The selected procedure should provide the efficient destruction of the sample, meaning transformation from solids to liquid, and total ionization of migrating atom or ion of arsenic, which is the basis for its quantitative determination. Natural zeolite ore and chemically identical zeolite mixture (reference material), with the adequate concentration of arsenic were used in the experimental work. The most appropriate procedure for chemical destruction can be preferentially and successfully applied also to the other mineral materials and tailings in which arsenic should be determined.
PB  - Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd
T2  - Ecologica
T1  - Određivanje arsena u rudama i jalovinama
T1  - The determination of arsenic in ores and tailings
EP  - 14
IS  - 49
SP  - 11
VL  - 14
UR  - conv_239
ER  - 

@article{
author = "Branković, Anđelka and Tešmanović, Ljiljana and Zildžović, Snežana and Kovačević, Dragana and Ileš, Deana",
year = "2007",
abstract = "Arsen se pojavljuje kao prateći element sulfidnih ruda ležišta gvožđa, olova i drugih metala. Njegovo prisustvo u rudama je katkad u dovoljnim količinama da je ekonomski opravdano razmišljati o njegovoj eksploataciji. Kao toksičan element i u veoma malim količinama degradira kvalitet rude, na primer olovo-cinkane rude ili rude zeolita. U mnogim geološko-geohemijskim sistemima je prisutan arsen, koji predstavlja rizik za kvalitet životne sredine. Ispitivan je uticaj različitih postupaka hemijskog razlaganja uzorka mineralne sirovine na određivanje arsena, metodom AAS-MHS, sa ciljem da se na bazi eksperimentalnih rezultata, odabere najoptimalniji. Postupak treba da omogući efikasno hemijsko razlaganje uzorka, odnosno transformaciju iz čvrstog u tečno i potpunu jonizaciju migrirajućeg atoma ili jona arsena, što predstavlja osnovu za njegovo kvantitativno određivanje. U eksperimentima je korišćen prirodni zeolit i njemu identična po hemijskom sastavu napravljena smeša (kao referentni materijal) sa određenom koncentracijom arsena. Najoptimalniji način hemijskog razlaganja može, prioritetno i uspešnije, da se primeni i na druge mineralne sirovine i jalovine u koji ma se određuje arsen., Arsenic occurs as a concomitant element of sulfide iron, lead and other metallic ores. The presence of arsenic in ores is sometimes in the quantities sufficient to be economically feasible. As a toxic element, even in the small quantities, arsenic degrades the quality of the ore, for example the lead-zinc or zeolite ore. Moreover, the arsenic is present in many geological-geochemical systems, representing the considerable risk for the quality of the environment. The objective of this paper is to present the results of the investigation aimed to evaluate the influence of different procedures applied for chemical destruction of mineral raw material on arsenic determination, using AAS-MHS method and selection of the optimal sample preparation procedure. The selected procedure should provide the efficient destruction of the sample, meaning transformation from solids to liquid, and total ionization of migrating atom or ion of arsenic, which is the basis for its quantitative determination. Natural zeolite ore and chemically identical zeolite mixture (reference material), with the adequate concentration of arsenic were used in the experimental work. The most appropriate procedure for chemical destruction can be preferentially and successfully applied also to the other mineral materials and tailings in which arsenic should be determined.",
publisher = "Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd",
journal = "Ecologica",
title = "Određivanje arsena u rudama i jalovinama, The determination of arsenic in ores and tailings",
pages = "14-11",
number = "49",
volume = "14",
url = "conv_239"
}

Branković, A., Tešmanović, L., Zildžović, S., Kovačević, D.,& Ileš, D.. (2007). Određivanje arsena u rudama i jalovinama. in Ecologica
Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd., 14(49), 11-14.
conv_239

Branković A, Tešmanović L, Zildžović S, Kovačević D, Ileš D. Određivanje arsena u rudama i jalovinama. in Ecologica. 2007;14(49):11-14.
conv_239 .

Branković, Anđelka, Tešmanović, Ljiljana, Zildžović, Snežana, Kovačević, Dragana, Ileš, Deana, "Određivanje arsena u rudama i jalovinama" in Ecologica, 14, no. 49 (2007):11-14,
conv_239 .