Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2
2019
Аутори
Bošković, I.Vukčević, M.
Nenadović, Snežana S.
Mirković, M.
Stojmenović, M.
Pavlović, Vladimir
Kljajević, Ljiljana M.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Geopolymers are an emerging class of materials that offer an alternative to the Portland cement as the binder of structural concrete. One of the advantages is that the primary source of their production is waste alumosilicate materials from different industries. One of the key issues in geopolymer synthesis is the low level of mechanical properties due to porosity as well as the high activity of conductivity carriers. It can often lead to limited application possibilities, so the objective is to obtain an enhanced strength as well as decreased cracking tendency through microstructure modification. The introduction of Ca(OH)2, under certain pH conditions could lead to the filling-the-pores process and improving the mechanical properties. The aim was to understand the role that calcium plays in the geopolymer synthesis, and to define which reaction prevails under the synthesis conditions: formation of geopolymer gel or calcium silicate hydrate that contains aluminum substitution (CASH). ...The synthesis was performed with different raw materials (with or without red mud) and different alkalinity conditions. Ca(OH)2 was the obligatory supplement to both of the mixtures. Different techniques were performed for the testing of reaction products, as well as to define the microstructural changes as the generator of improved mechanical properties and changed electrical conductivity. The characteristics of the geopolymer's macrostructure were defined by means of an SEM analysis. Compressive strength and electrical conductivity are among the investigated product's properties. X-ray diffraction (XRD) and Fourier transform infra-red spectroscopy (FTIR) were used for the identification of various crystalline phases and an amorphous phase.
Кључне речи:
Calcium hydroxide / Compressive strength / Electrical conductivity / GeopolymersИзвор:
Materiali in Tehnologije, 2019, 53, 3, 341-348Издавач:
- Institute of Metals Technology
DOI: 10.17222/mit.2018.130
ISSN: 1580-2949
WoS: 000470994000007
Scopus: 2-s2.0-85067239580
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Bošković, I. AU - Vukčević, M. AU - Nenadović, Snežana S. AU - Mirković, M. AU - Stojmenović, M. AU - Pavlović, Vladimir AU - Kljajević, Ljiljana M. PY - 2019 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5129 AB - Geopolymers are an emerging class of materials that offer an alternative to the Portland cement as the binder of structural concrete. One of the advantages is that the primary source of their production is waste alumosilicate materials from different industries. One of the key issues in geopolymer synthesis is the low level of mechanical properties due to porosity as well as the high activity of conductivity carriers. It can often lead to limited application possibilities, so the objective is to obtain an enhanced strength as well as decreased cracking tendency through microstructure modification. The introduction of Ca(OH)2, under certain pH conditions could lead to the filling-the-pores process and improving the mechanical properties. The aim was to understand the role that calcium plays in the geopolymer synthesis, and to define which reaction prevails under the synthesis conditions: formation of geopolymer gel or calcium silicate hydrate that contains aluminum substitution (CASH). The synthesis was performed with different raw materials (with or without red mud) and different alkalinity conditions. Ca(OH)2 was the obligatory supplement to both of the mixtures. Different techniques were performed for the testing of reaction products, as well as to define the microstructural changes as the generator of improved mechanical properties and changed electrical conductivity. The characteristics of the geopolymer's macrostructure were defined by means of an SEM analysis. Compressive strength and electrical conductivity are among the investigated product's properties. X-ray diffraction (XRD) and Fourier transform infra-red spectroscopy (FTIR) were used for the identification of various crystalline phases and an amorphous phase. PB - Institute of Metals Technology T2 - Materiali in Tehnologije T1 - Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2 EP - 348 IS - 3 SP - 341 VL - 53 DO - 10.17222/mit.2018.130 ER -
@article{ author = "Bošković, I. and Vukčević, M. and Nenadović, Snežana S. and Mirković, M. and Stojmenović, M. and Pavlović, Vladimir and Kljajević, Ljiljana M.", year = "2019", abstract = "Geopolymers are an emerging class of materials that offer an alternative to the Portland cement as the binder of structural concrete. One of the advantages is that the primary source of their production is waste alumosilicate materials from different industries. One of the key issues in geopolymer synthesis is the low level of mechanical properties due to porosity as well as the high activity of conductivity carriers. It can often lead to limited application possibilities, so the objective is to obtain an enhanced strength as well as decreased cracking tendency through microstructure modification. The introduction of Ca(OH)2, under certain pH conditions could lead to the filling-the-pores process and improving the mechanical properties. The aim was to understand the role that calcium plays in the geopolymer synthesis, and to define which reaction prevails under the synthesis conditions: formation of geopolymer gel or calcium silicate hydrate that contains aluminum substitution (CASH). The synthesis was performed with different raw materials (with or without red mud) and different alkalinity conditions. Ca(OH)2 was the obligatory supplement to both of the mixtures. Different techniques were performed for the testing of reaction products, as well as to define the microstructural changes as the generator of improved mechanical properties and changed electrical conductivity. The characteristics of the geopolymer's macrostructure were defined by means of an SEM analysis. Compressive strength and electrical conductivity are among the investigated product's properties. X-ray diffraction (XRD) and Fourier transform infra-red spectroscopy (FTIR) were used for the identification of various crystalline phases and an amorphous phase.", publisher = "Institute of Metals Technology", journal = "Materiali in Tehnologije", title = "Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2", pages = "348-341", number = "3", volume = "53", doi = "10.17222/mit.2018.130" }
Bošković, I., Vukčević, M., Nenadović, S. S., Mirković, M., Stojmenović, M., Pavlović, V.,& Kljajević, L. M.. (2019). Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2. in Materiali in Tehnologije Institute of Metals Technology., 53(3), 341-348. https://doi.org/10.17222/mit.2018.130
Bošković I, Vukčević M, Nenadović SS, Mirković M, Stojmenović M, Pavlović V, Kljajević LM. Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2. in Materiali in Tehnologije. 2019;53(3):341-348. doi:10.17222/mit.2018.130 .
Bošković, I., Vukčević, M., Nenadović, Snežana S., Mirković, M., Stojmenović, M., Pavlović, Vladimir, Kljajević, Ljiljana M., "Characterization of red mud/metakaolin-based geopolymers as modified by Ca(OH)2" in Materiali in Tehnologije, 53, no. 3 (2019):341-348, https://doi.org/10.17222/mit.2018.130 . .