TY  - JOUR
AU  - Nuccetelli, Cristina
AU  - Trevisi, Rosabianca
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/849
AB  - The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of K-40, Ra-226 and Th-232 were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(pd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(pd) values are lower than index I values. As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.
PB  - Elsevier Ltd
T2  - Journal of Environmental Radioactivity
T1  - Alkali-activated concrete with Serbian fly ash and its radiological impact
EP  - 37
SP  - 30
VL  - 168
DO  - 10.1016/j.jenvrad.2016.09.002
ER  - 

@article{
author = "Nuccetelli, Cristina and Trevisi, Rosabianca and Ignjatović, Ivan and Dragaš, Jelena",
year = "2017",
abstract = "The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of K-40, Ra-226 and Th-232 were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(pd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(pd) values are lower than index I values. As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.",
publisher = "Elsevier Ltd",
journal = "Journal of Environmental Radioactivity",
title = "Alkali-activated concrete with Serbian fly ash and its radiological impact",
pages = "37-30",
volume = "168",
doi = "10.1016/j.jenvrad.2016.09.002"
}

Nuccetelli, C., Trevisi, R., Ignjatović, I.,& Dragaš, J.. (2017). Alkali-activated concrete with Serbian fly ash and its radiological impact. in Journal of Environmental Radioactivity
Elsevier Ltd., 168, 30-37.
https://doi.org/10.1016/j.jenvrad.2016.09.002

Nuccetelli C, Trevisi R, Ignjatović I, Dragaš J. Alkali-activated concrete with Serbian fly ash and its radiological impact. in Journal of Environmental Radioactivity. 2017;168:30-37.
doi:10.1016/j.jenvrad.2016.09.002 .

Nuccetelli, Cristina, Trevisi, Rosabianca, Ignjatović, Ivan, Dragaš, Jelena, "Alkali-activated concrete with Serbian fly ash and its radiological impact" in Journal of Environmental Radioactivity, 168 (2017):30-37,
https://doi.org/10.1016/j.jenvrad.2016.09.002 . .

TY  - JOUR
AU  - Ignjatović, Ivan
AU  - Sas, Z.
AU  - Dragaš, Jelena
AU  - Somlai, J.
AU  - Kovacs, T.
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/848
AB  - The main goal of research presented in this paper was the material and radiological characterization of high volume fly ash concrete (HVFAC) in terms of determination of natural radionuclide content and radon emanation and exhalation coefficients. All concrete samples were made with a fly ash content between 50% and 70% of the total amount of cementitious materials from one coal burning power plant in Serbia. Physical (fresh and hardened concrete density) and mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) of concrete were tested. The radionuclide content (Ra-226, Th-232 and (40)k) and radon massic exhalation of HVFAC samples were determined using gamma spectrometry. Determination of massic exhalation rates of HVFAC and its components using radon accumulation chamber techniques combined with a radon monitor was performed. The results show a beneficial effect of pozzolanic activity since the increase in fly ash content resulted in an increase in compressive strength of HVFAC by approximately 20% for the same mass of cement used in the mixtures. On the basis of the obtained radionuclide content of concrete components the I -indices of different HVFAC samples were calculated and compared with measured values (0.27-0.32), which were significantly below the recommended 1.0 index value. The prediction was relatively close to the measured values as the ratio between the calculated and measured I-index ranged between 0.89 and 1.14. Collected results of mechanical and radiological properties and performed calculations clearly prove that all 10 designed concretes with a certain type of fly ash are suitable for structural and non-structural applications both from a material and radiological point of view.
PB  - Elsevier Ltd
T2  - Journal of Environmental Radioactivity
T1  - Radiological and material characterization of high volume fly ash concrete
EP  - 45
SP  - 38
VL  - 168
DO  - 10.1016/j.jenvrad.2016.06.021
ER  - 

@article{
author = "Ignjatović, Ivan and Sas, Z. and Dragaš, Jelena and Somlai, J. and Kovacs, T.",
year = "2017",
abstract = "The main goal of research presented in this paper was the material and radiological characterization of high volume fly ash concrete (HVFAC) in terms of determination of natural radionuclide content and radon emanation and exhalation coefficients. All concrete samples were made with a fly ash content between 50% and 70% of the total amount of cementitious materials from one coal burning power plant in Serbia. Physical (fresh and hardened concrete density) and mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) of concrete were tested. The radionuclide content (Ra-226, Th-232 and (40)k) and radon massic exhalation of HVFAC samples were determined using gamma spectrometry. Determination of massic exhalation rates of HVFAC and its components using radon accumulation chamber techniques combined with a radon monitor was performed. The results show a beneficial effect of pozzolanic activity since the increase in fly ash content resulted in an increase in compressive strength of HVFAC by approximately 20% for the same mass of cement used in the mixtures. On the basis of the obtained radionuclide content of concrete components the I -indices of different HVFAC samples were calculated and compared with measured values (0.27-0.32), which were significantly below the recommended 1.0 index value. The prediction was relatively close to the measured values as the ratio between the calculated and measured I-index ranged between 0.89 and 1.14. Collected results of mechanical and radiological properties and performed calculations clearly prove that all 10 designed concretes with a certain type of fly ash are suitable for structural and non-structural applications both from a material and radiological point of view.",
publisher = "Elsevier Ltd",
journal = "Journal of Environmental Radioactivity",
title = "Radiological and material characterization of high volume fly ash concrete",
pages = "45-38",
volume = "168",
doi = "10.1016/j.jenvrad.2016.06.021"
}

Ignjatović, I., Sas, Z., Dragaš, J., Somlai, J.,& Kovacs, T.. (2017). Radiological and material characterization of high volume fly ash concrete. in Journal of Environmental Radioactivity
Elsevier Ltd., 168, 38-45.
https://doi.org/10.1016/j.jenvrad.2016.06.021

Ignjatović I, Sas Z, Dragaš J, Somlai J, Kovacs T. Radiological and material characterization of high volume fly ash concrete. in Journal of Environmental Radioactivity. 2017;168:38-45.
doi:10.1016/j.jenvrad.2016.06.021 .

Ignjatović, Ivan, Sas, Z., Dragaš, Jelena, Somlai, J., Kovacs, T., "Radiological and material characterization of high volume fly ash concrete" in Journal of Environmental Radioactivity, 168 (2017):38-45,
https://doi.org/10.1016/j.jenvrad.2016.06.021 . .

TY  - JOUR
AU  - Nuccetelli, Cristina
AU  - Trevisi, Rosabianca
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1714
AB  - The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of 40K, 226Ra and 232Th were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(ρd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(ρd) values are lower than index I values.

As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.
PB  - Elsevier
T2  - Journal of Environmental Radioactivity
T1  - Alkali-activated concrete with Serbian fly ash and its radiological impact
EP  - 37
SP  - 30
VL  - 168
DO  - 10.1016/j.jenvrad.2016.09.002
ER  - 

@article{
author = "Nuccetelli, Cristina and Trevisi, Rosabianca and Ignjatović, Ivan and Dragaš, Jelena",
year = "2016",
abstract = "The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast furnace slag were designed. Measurements of the activity concentrations of 40K, 226Ra and 232Th were done both on concrete constituents (fly ash, blast furnace slag and aggregate) and on the five solid AAC samples. Experimental results were compared by using the activity concentration assessment tool for building materials - the activity concentration index I, as introduced by the EU Basic Safety Standards (CE, 2014). All five designed alkali-activated concretes comply with EU BSS screening requirements for indoor building materials. Finally, index I values were compared with the results of the application of a more accurate index - I(ρd), which accounts for thickness and density of building materials (Nuccetelli et al., 2015a). Considering the actual density and thickness of each concrete sample index - I(ρd) values are lower than index I values.

As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.",
publisher = "Elsevier",
journal = "Journal of Environmental Radioactivity",
title = "Alkali-activated concrete with Serbian fly ash and its radiological impact",
pages = "37-30",
volume = "168",
doi = "10.1016/j.jenvrad.2016.09.002"
}

Nuccetelli, C., Trevisi, R., Ignjatović, I.,& Dragaš, J.. (2016). Alkali-activated concrete with Serbian fly ash and its radiological impact. in Journal of Environmental Radioactivity
Elsevier., 168, 30-37.
https://doi.org/10.1016/j.jenvrad.2016.09.002

Nuccetelli C, Trevisi R, Ignjatović I, Dragaš J. Alkali-activated concrete with Serbian fly ash and its radiological impact. in Journal of Environmental Radioactivity. 2016;168:30-37.
doi:10.1016/j.jenvrad.2016.09.002 .

Nuccetelli, Cristina, Trevisi, Rosabianca, Ignjatović, Ivan, Dragaš, Jelena, "Alkali-activated concrete with Serbian fly ash and its radiological impact" in Journal of Environmental Radioactivity, 168 (2016):30-37,
https://doi.org/10.1016/j.jenvrad.2016.09.002 . .