Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana
Abstract
Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle size laser diffraction (PSLD), X-ray diffraction (XRD), differential scanning calorimetry/thermogravimetry (DTA/TGA) and Fourier-transform infrared (FTIR) analyses. Mechanochemical treatment induced amorphization of the kaolinite phase accompanied by dehydroxylation. It was found that for the given milling parameters, amorphization mainly took place in the milling period up to 15 min, and was completed after about 30 min of milling for both milling media used. The pozzolanic activities were determined by the Chapelle method. Milling in the hardened steel milling medium had no significant influence on pozzolanic activity, even though there was accumulated iron contamination. For both milling media, pozzolanic activity of 0.79 was obtained ...for the samples milled for 15 min and it remained almost unchanged with prolonged milling. The determined pozzolanic activity values are close to these of commercial metakaolinite or metakaolinite obtained by the calcination of the same clay, therefore, indicating possibility for obtaining high reactive pozzolana by mechanochemical treatment of Serbian kaoline clay. [Projekat Ministarstva nauke Republike Srbije, br. TR 36017 and 45001]
Keywords:
kaolin clay / kaolinite / metakaolinite / mechanochemical treatment / pozzolanaSource:
Journal of the Serbian Chemical Society, 2013, 78, 4, 579-590Publisher:
- Belgrade : Serbian Chemical Society
Funding / projects:
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)
- Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)
DOI: 10.2298/JSC120829107M
ISSN: 0352-5139; 1820-7421
WoS: 000318256600012
Scopus: 2-s2.0-84877647714
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Mitrović, Aleksandra AU - Zdujić, Miodrag PY - 2013 UR - https://dais.sanu.ac.rs/123456789/269 AB - Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle size laser diffraction (PSLD), X-ray diffraction (XRD), differential scanning calorimetry/thermogravimetry (DTA/TGA) and Fourier-transform infrared (FTIR) analyses. Mechanochemical treatment induced amorphization of the kaolinite phase accompanied by dehydroxylation. It was found that for the given milling parameters, amorphization mainly took place in the milling period up to 15 min, and was completed after about 30 min of milling for both milling media used. The pozzolanic activities were determined by the Chapelle method. Milling in the hardened steel milling medium had no significant influence on pozzolanic activity, even though there was accumulated iron contamination. For both milling media, pozzolanic activity of 0.79 was obtained for the samples milled for 15 min and it remained almost unchanged with prolonged milling. The determined pozzolanic activity values are close to these of commercial metakaolinite or metakaolinite obtained by the calcination of the same clay, therefore, indicating possibility for obtaining high reactive pozzolana by mechanochemical treatment of Serbian kaoline clay. [Projekat Ministarstva nauke Republike Srbije, br. TR 36017 and 45001] PB - Belgrade : Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana SP - 579 EP - 590 VL - 78 IS - 4 DO - 10.2298/JSC120829107M UR - https://hdl.handle.net/21.15107/rcub_dais_269 ER -
@article{ author = "Mitrović, Aleksandra and Zdujić, Miodrag", year = "2013", abstract = "Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle size laser diffraction (PSLD), X-ray diffraction (XRD), differential scanning calorimetry/thermogravimetry (DTA/TGA) and Fourier-transform infrared (FTIR) analyses. Mechanochemical treatment induced amorphization of the kaolinite phase accompanied by dehydroxylation. It was found that for the given milling parameters, amorphization mainly took place in the milling period up to 15 min, and was completed after about 30 min of milling for both milling media used. The pozzolanic activities were determined by the Chapelle method. Milling in the hardened steel milling medium had no significant influence on pozzolanic activity, even though there was accumulated iron contamination. For both milling media, pozzolanic activity of 0.79 was obtained for the samples milled for 15 min and it remained almost unchanged with prolonged milling. The determined pozzolanic activity values are close to these of commercial metakaolinite or metakaolinite obtained by the calcination of the same clay, therefore, indicating possibility for obtaining high reactive pozzolana by mechanochemical treatment of Serbian kaoline clay. [Projekat Ministarstva nauke Republike Srbije, br. TR 36017 and 45001]", publisher = "Belgrade : Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana", pages = "579-590", volume = "78", number = "4", doi = "10.2298/JSC120829107M", url = "https://hdl.handle.net/21.15107/rcub_dais_269" }
Mitrović, A.,& Zdujić, M.. (2013). Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana. in Journal of the Serbian Chemical Society Belgrade : Serbian Chemical Society., 78(4), 579-590. https://doi.org/10.2298/JSC120829107M https://hdl.handle.net/21.15107/rcub_dais_269
Mitrović A, Zdujić M. Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana. in Journal of the Serbian Chemical Society. 2013;78(4):579-590. doi:10.2298/JSC120829107M https://hdl.handle.net/21.15107/rcub_dais_269 .
Mitrović, Aleksandra, Zdujić, Miodrag, "Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana" in Journal of the Serbian Chemical Society, 78, no. 4 (2013):579-590, https://doi.org/10.2298/JSC120829107M ., https://hdl.handle.net/21.15107/rcub_dais_269 .