Preparation of pozzolanic addition by mechanical treatment of kaolin clay
Abstract
Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, amorphization/dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75 m2 g− 1, total pore volume of 0.0580 cm3 g− 1, pozzolanic activity (compressive strength) of 14 MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was prolonged, could be explained by kaolinite amorphization as well as the mechanical activation o...f quartz.
Keywords:
quartz / clays / mining / kaolinite / pozzolanSource:
International Journal of Mineral Processing, 2014, 132, 59-66Publisher:
- Elsevier
Funding / projects:
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-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-MESTD-Technological Development (TD or TR)-36017)
DOI: 10.1016/j.minpro.2014.09.004
ISSN: 0301-7516
WoS: 000344212300007
Scopus: 2-s2.0-84908604522
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Mitrović, Aleksandra AU - Zdujić, Miodrag PY - 2014 UR - https://dais.sanu.ac.rs/123456789/659 AB - Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, amorphization/dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75 m2 g− 1, total pore volume of 0.0580 cm3 g− 1, pozzolanic activity (compressive strength) of 14 MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was prolonged, could be explained by kaolinite amorphization as well as the mechanical activation of quartz. PB - Elsevier T2 - International Journal of Mineral Processing T1 - Preparation of pozzolanic addition by mechanical treatment of kaolin clay SP - 59 EP - 66 VL - 132 DO - 10.1016/j.minpro.2014.09.004 UR - https://hdl.handle.net/21.15107/rcub_dais_659 ER -
@article{ author = "Mitrović, Aleksandra and Zdujić, Miodrag", year = "2014", abstract = "Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, amorphization/dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75 m2 g− 1, total pore volume of 0.0580 cm3 g− 1, pozzolanic activity (compressive strength) of 14 MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was prolonged, could be explained by kaolinite amorphization as well as the mechanical activation of quartz.", publisher = "Elsevier", journal = "International Journal of Mineral Processing", title = "Preparation of pozzolanic addition by mechanical treatment of kaolin clay", pages = "59-66", volume = "132", doi = "10.1016/j.minpro.2014.09.004", url = "https://hdl.handle.net/21.15107/rcub_dais_659" }
Mitrović, A.,& Zdujić, M.. (2014). Preparation of pozzolanic addition by mechanical treatment of kaolin clay. in International Journal of Mineral Processing Elsevier., 132, 59-66. https://doi.org/10.1016/j.minpro.2014.09.004 https://hdl.handle.net/21.15107/rcub_dais_659
Mitrović A, Zdujić M. Preparation of pozzolanic addition by mechanical treatment of kaolin clay. in International Journal of Mineral Processing. 2014;132:59-66. doi:10.1016/j.minpro.2014.09.004 https://hdl.handle.net/21.15107/rcub_dais_659 .
Mitrović, Aleksandra, Zdujić, Miodrag, "Preparation of pozzolanic addition by mechanical treatment of kaolin clay" in International Journal of Mineral Processing, 132 (2014):59-66, https://doi.org/10.1016/j.minpro.2014.09.004 ., https://hdl.handle.net/21.15107/rcub_dais_659 .