TY  - CONF
AU  - Vulić, Tatjana
AU  - Hadnađev-Kostić, Milica
AU  - Rajaković-Ognjanović, Vladana
AU  - Lekić, Branislava
AU  - Zakić, Dimitrije
AU  - Aškrabić, Marina
AU  - Karanović, Đurđica
AU  - Govedarica, Ognjen
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3296
PB  - University of Niš, Faculty of Technology
C3  - 15th International symposium „Novel technologies and sustainable development“, Leskovac, 20-21. oktobar, 2023.
T1  - Pervious concrete pavements: The influence of solidified wastewater treatment sludge as a supplementary cementitious material on pavement porosity
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3296
ER  - 

@conference{
author = "Vulić, Tatjana and Hadnađev-Kostić, Milica and Rajaković-Ognjanović, Vladana and Lekić, Branislava and Zakić, Dimitrije and Aškrabić, Marina and Karanović, Đurđica and Govedarica, Ognjen",
year = "2023",
publisher = "University of Niš, Faculty of Technology",
journal = "15th International symposium „Novel technologies and sustainable development“, Leskovac, 20-21. oktobar, 2023.",
title = "Pervious concrete pavements: The influence of solidified wastewater treatment sludge as a supplementary cementitious material on pavement porosity",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3296"
}

Vulić, T., Hadnađev-Kostić, M., Rajaković-Ognjanović, V., Lekić, B., Zakić, D., Aškrabić, M., Karanović, Đ.,& Govedarica, O.. (2023). Pervious concrete pavements: The influence of solidified wastewater treatment sludge as a supplementary cementitious material on pavement porosity. in 15th International symposium „Novel technologies and sustainable development“, Leskovac, 20-21. oktobar, 2023.
University of Niš, Faculty of Technology..
https://hdl.handle.net/21.15107/rcub_grafar_3296

Vulić T, Hadnađev-Kostić M, Rajaković-Ognjanović V, Lekić B, Zakić D, Aškrabić M, Karanović Đ, Govedarica O. Pervious concrete pavements: The influence of solidified wastewater treatment sludge as a supplementary cementitious material on pavement porosity. in 15th International symposium „Novel technologies and sustainable development“, Leskovac, 20-21. oktobar, 2023.. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3296 .

Vulić, Tatjana, Hadnađev-Kostić, Milica, Rajaković-Ognjanović, Vladana, Lekić, Branislava, Zakić, Dimitrije, Aškrabić, Marina, Karanović, Đurđica, Govedarica, Ognjen, "Pervious concrete pavements: The influence of solidified wastewater treatment sludge as a supplementary cementitious material on pavement porosity" in 15th International symposium „Novel technologies and sustainable development“, Leskovac, 20-21. oktobar, 2023. (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3296 .

TY  - CONF
AU  - Radovanović, Željko
AU  - Govedarica, Ognjen
AU  - Aškrabić, Marina
AU  - Hadnađev-Kostić, Milica
AU  - Vulić, Tatjana
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
AU  - Zakić, Dimitrije
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3297
PB  - Material Research Society of Serbia
C3  - 24th Annual Conference Yucomat 2023, 4-8 September, Herceg Novi
T1  - Solidified wastewater treatment sludge as a prospective supplementary cementitious material for processing pervious concrete pavements
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3297
ER  - 

@conference{
author = "Radovanović, Željko and Govedarica, Ognjen and Aškrabić, Marina and Hadnađev-Kostić, Milica and Vulić, Tatjana and Lekić, Branislava and Rajaković-Ognjanović, Vladana and Zakić, Dimitrije",
year = "2023",
publisher = "Material Research Society of Serbia",
journal = "24th Annual Conference Yucomat 2023, 4-8 September, Herceg Novi",
title = "Solidified wastewater treatment sludge as a prospective supplementary cementitious material for processing pervious concrete pavements",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3297"
}

Radovanović, Ž., Govedarica, O., Aškrabić, M., Hadnađev-Kostić, M., Vulić, T., Lekić, B., Rajaković-Ognjanović, V.,& Zakić, D.. (2023). Solidified wastewater treatment sludge as a prospective supplementary cementitious material for processing pervious concrete pavements. in 24th Annual Conference Yucomat 2023, 4-8 September, Herceg Novi
Material Research Society of Serbia..
https://hdl.handle.net/21.15107/rcub_grafar_3297

Radovanović Ž, Govedarica O, Aškrabić M, Hadnađev-Kostić M, Vulić T, Lekić B, Rajaković-Ognjanović V, Zakić D. Solidified wastewater treatment sludge as a prospective supplementary cementitious material for processing pervious concrete pavements. in 24th Annual Conference Yucomat 2023, 4-8 September, Herceg Novi. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3297 .

Radovanović, Željko, Govedarica, Ognjen, Aškrabić, Marina, Hadnađev-Kostić, Milica, Vulić, Tatjana, Lekić, Branislava, Rajaković-Ognjanović, Vladana, Zakić, Dimitrije, "Solidified wastewater treatment sludge as a prospective supplementary cementitious material for processing pervious concrete pavements" in 24th Annual Conference Yucomat 2023, 4-8 September, Herceg Novi (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3297 .

TY  - CONF
AU  - Karanović, Đurđica
AU  - Hadnađev-Kostić, Milica
AU  - Vulić, Tatjana
AU  - Jokić, Aleksandar
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
AU  - Govedarica, Ognjen
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2909
AB  - Various organic pollutants are discharged into the water from chemical, textile and
pharmaceutical industries every day. The photocatalytic wastewater treatment is an efficient,
cheap and eco-friendly process for the removal of organic toxic dyes, such as methylene blue,
which is one of the most common toxic dyes in wastewater. Photocatalysts ZnCr mixed
oxides were synthesized and thermally treated at 500 and 900 °C. Their efficiency in
photocatalytic degradation of methylene blue and the influence of the reaction parameters
were studied. High photocatalytic activity of both samples was observed, where the complete
decolorization (100%) and partial decolorization (45%) of the aqueous solution of methylene
blue were achieved after 6 hours for ZnCr 900 and ZnCr 500, respectively. In order to
determine the influence of the pH on the photocatalytic effieciency, the photodegradation
reactions were conducted using better performing photocatalyst at different pH values,
measuring the photodegradation efficiency at the same time intervals. The optimal pH
resulting in the most efficient photodegradation for ZnCr 900 photocatalyst was observed at
pH 12, which could be explained by the correlation with different textural and structural
properties of photocatalysts. The results showed that the obtained ZnCr mixed oxides are
highly efficient in the methylene blue photodegradation and have a great potential for the
application in the photocatalytic wastewater treatment processes.
PB  - University of Novi Sad, Faculty of Technology Novi Sad
C3  - 2nd International Conferenceon Advanced Production and Processing
T1  - Photocatalytic efficiency of ZnCr-mixed metal oxides in correlation to reaction parameters
EP  - 234
SP  - 234
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2909
ER  - 

@conference{
author = "Karanović, Đurđica and Hadnađev-Kostić, Milica and Vulić, Tatjana and Jokić, Aleksandar and Lekić, Branislava and Rajaković-Ognjanović, Vladana and Govedarica, Ognjen",
year = "2022",
abstract = "Various organic pollutants are discharged into the water from chemical, textile and
pharmaceutical industries every day. The photocatalytic wastewater treatment is an efficient,
cheap and eco-friendly process for the removal of organic toxic dyes, such as methylene blue,
which is one of the most common toxic dyes in wastewater. Photocatalysts ZnCr mixed
oxides were synthesized and thermally treated at 500 and 900 °C. Their efficiency in
photocatalytic degradation of methylene blue and the influence of the reaction parameters
were studied. High photocatalytic activity of both samples was observed, where the complete
decolorization (100%) and partial decolorization (45%) of the aqueous solution of methylene
blue were achieved after 6 hours for ZnCr 900 and ZnCr 500, respectively. In order to
determine the influence of the pH on the photocatalytic effieciency, the photodegradation
reactions were conducted using better performing photocatalyst at different pH values,
measuring the photodegradation efficiency at the same time intervals. The optimal pH
resulting in the most efficient photodegradation for ZnCr 900 photocatalyst was observed at
pH 12, which could be explained by the correlation with different textural and structural
properties of photocatalysts. The results showed that the obtained ZnCr mixed oxides are
highly efficient in the methylene blue photodegradation and have a great potential for the
application in the photocatalytic wastewater treatment processes.",
publisher = "University of Novi Sad, Faculty of Technology Novi Sad",
journal = "2nd International Conferenceon Advanced Production and Processing",
title = "Photocatalytic efficiency of ZnCr-mixed metal oxides in correlation to reaction parameters",
pages = "234-234",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2909"
}

Karanović, Đ., Hadnađev-Kostić, M., Vulić, T., Jokić, A., Lekić, B., Rajaković-Ognjanović, V.,& Govedarica, O.. (2022). Photocatalytic efficiency of ZnCr-mixed metal oxides in correlation to reaction parameters. in 2nd International Conferenceon Advanced Production and Processing
University of Novi Sad, Faculty of Technology Novi Sad., 234-234.
https://hdl.handle.net/21.15107/rcub_grafar_2909

Karanović Đ, Hadnađev-Kostić M, Vulić T, Jokić A, Lekić B, Rajaković-Ognjanović V, Govedarica O. Photocatalytic efficiency of ZnCr-mixed metal oxides in correlation to reaction parameters. in 2nd International Conferenceon Advanced Production and Processing. 2022;:234-234.
https://hdl.handle.net/21.15107/rcub_grafar_2909 .

Karanović, Đurđica, Hadnađev-Kostić, Milica, Vulić, Tatjana, Jokić, Aleksandar, Lekić, Branislava, Rajaković-Ognjanović, Vladana, Govedarica, Ognjen, "Photocatalytic efficiency of ZnCr-mixed metal oxides in correlation to reaction parameters" in 2nd International Conferenceon Advanced Production and Processing (2022):234-234,
https://hdl.handle.net/21.15107/rcub_grafar_2909 .

TY  - JOUR
AU  - Govedarica, Ognjen
AU  - Aškrabić, Marina
AU  - Hadnađev-Kostić, Milica
AU  - Vulić, Tatjana
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
AU  - Zakić, Dimitrije
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2697
AB  - Waste and recycled materials have recently been used in the construction industry to comply with the principles of circular economy and sustainable development. The aim of this paper is to examine the potentials of solidified wastewater treatment sludge (SWWTS) as a supplementary cementitious material (SCM) in the production of lightweight pervious concrete pavers (LWPCP) suitable for pedestrian trails and rooftops (green) that comply with EU standards. Detailed characterization of SWWTS was performed, in order to understand its properties related to application as SCM, which led to the conclusion that it may be applied only as a filler, having 89.5% of Ca(OH)2. After thorough characterization, LWPCP samples were prepared and testing of physical and mechanical properties was conducted. The research showed that partial replacement of cement with SWWTS led to the decrease of all mechanical properties, ranging between 3.91 and 5.81 MPa for compressive strength and 0.97 to 1.23 MPa for flexural strength. However, all of the investigated mixtures showed a value higher than 3.5 MPa, which was defined as the lowest compressive strength in the range of pervious concrete properties. The addition of SWWTS led to a slight decrease in bulk density of the mixtures and an increase in water absorption. This could be explained by the reduction in hydration products that would fill in the micropores of the matrix, since SWWTS showed no pozzolanic reactivity. Pore sizes that prevail in the tested binder matrices are in accordance with the results measured on ordinary pervious concrete (the largest fraction of pores had a diameter between 0.02 and 0.2 μm). Low thermal conductivity nominates produced pavers as potential rooftop elements.
PB  - MDPI
T2  - Materials 2022, The Special Issue Industrial Symbiosis and Development of New Materials or Products in Building Sector
T1  - Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements
IS  - 14
VL  - 15
DO  - https://doi.org/10.3390/ma15144919
ER  - 

@article{
author = "Govedarica, Ognjen and Aškrabić, Marina and Hadnađev-Kostić, Milica and Vulić, Tatjana and Lekić, Branislava and Rajaković-Ognjanović, Vladana and Zakić, Dimitrije",
year = "2022",
abstract = "Waste and recycled materials have recently been used in the construction industry to comply with the principles of circular economy and sustainable development. The aim of this paper is to examine the potentials of solidified wastewater treatment sludge (SWWTS) as a supplementary cementitious material (SCM) in the production of lightweight pervious concrete pavers (LWPCP) suitable for pedestrian trails and rooftops (green) that comply with EU standards. Detailed characterization of SWWTS was performed, in order to understand its properties related to application as SCM, which led to the conclusion that it may be applied only as a filler, having 89.5% of Ca(OH)2. After thorough characterization, LWPCP samples were prepared and testing of physical and mechanical properties was conducted. The research showed that partial replacement of cement with SWWTS led to the decrease of all mechanical properties, ranging between 3.91 and 5.81 MPa for compressive strength and 0.97 to 1.23 MPa for flexural strength. However, all of the investigated mixtures showed a value higher than 3.5 MPa, which was defined as the lowest compressive strength in the range of pervious concrete properties. The addition of SWWTS led to a slight decrease in bulk density of the mixtures and an increase in water absorption. This could be explained by the reduction in hydration products that would fill in the micropores of the matrix, since SWWTS showed no pozzolanic reactivity. Pore sizes that prevail in the tested binder matrices are in accordance with the results measured on ordinary pervious concrete (the largest fraction of pores had a diameter between 0.02 and 0.2 μm). Low thermal conductivity nominates produced pavers as potential rooftop elements.",
publisher = "MDPI",
journal = "Materials 2022, The Special Issue Industrial Symbiosis and Development of New Materials or Products in Building Sector",
title = "Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements",
number = "14",
volume = "15",
doi = "https://doi.org/10.3390/ma15144919"
}

Govedarica, O., Aškrabić, M., Hadnađev-Kostić, M., Vulić, T., Lekić, B., Rajaković-Ognjanović, V.,& Zakić, D.. (2022). Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements. in Materials 2022, The Special Issue Industrial Symbiosis and Development of New Materials or Products in Building Sector
MDPI., 15(14).
https://doi.org/https://doi.org/10.3390/ma15144919

Govedarica O, Aškrabić M, Hadnađev-Kostić M, Vulić T, Lekić B, Rajaković-Ognjanović V, Zakić D. Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements. in Materials 2022, The Special Issue Industrial Symbiosis and Development of New Materials or Products in Building Sector. 2022;15(14).
doi:https://doi.org/10.3390/ma15144919 .

Govedarica, Ognjen, Aškrabić, Marina, Hadnađev-Kostić, Milica, Vulić, Tatjana, Lekić, Branislava, Rajaković-Ognjanović, Vladana, Zakić, Dimitrije, "Evaluation of Solidified Wastewater Treatment Sludge as a Potential SCM in Pervious Concrete Pavements" in Materials 2022, The Special Issue Industrial Symbiosis and Development of New Materials or Products in Building Sector, 15, no. 14 (2022),
https://doi.org/https://doi.org/10.3390/ma15144919 . .