Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica
Чланак у часопису
МетаподациПриказ свих података о документу
Kaolin from a Serbian deposit, characterized by high content of impurities, such as mica and quartz, disordered kaolinite and high specific surface area, was subjected to thermal and mechanical activation on a large scale. Activations were carried out with a goal to investigate the effects of applied methods on the chemical, structural and morphological changes that occurred in the kaolin, and their influence on the pozzolanic activity. The changes were monitored using XRD, FTIR, TG/DTA, PSD, BET and SEM analyses. Pozzolanic activity was evaluated by determination of the 7-day compressive strength conducted on the lime mortars. The results showed that mechanical activation by milling the kaolin for 20 h in the conventional horizontal ball mill was competitive for obtaining pozzolana as thermal activation. Pozzolanic activity of thermally activated kaolin was mainly influenced by formation of metakaolin. Combined effects (such as significant specific surface area increase, as well as... partial kaolinite and complete mica phase amorphization) were dominant in pozzolanic activity of mechanically activated kaolin.
Кључне речи:Thermal activation / Mechanical activation / Kaolin / Pozzolanic activity
Извор:Applied Clay Science, 2016, 123, 173-181
- Истраживање могућности примене отпадних и рециклираних материјала у бетонским композитима, са оценом утицаја на животну средину, у циљу промоције одрживог грађевинарства у србији (RS-36017)
- Наноструктурни функционални и композитни материјали у каталитичким и сорпционим процесима (RS-45001)
ISSN: 0169-1317[ Google Scholar ]
ИнституцијаИнститут техничких наука САНУ
Showing items related by title, author, creator and subject.
Enzymatic Synthesis of Aliphatic Esters of Phenolic Acids and Evaluation of Their Antioxidant Properties Knežević Jugović, Zorica; Jakovetić, Sonja; Jugović, Branimir; Gvozdenović, Milica M.; Grbavčić, Sanja; Bezbradica, Dejan; Antov, Mirjana (Tatranské Matliare : Slovak Society of Chemical Engineering, 2012)The esterification activity of the commercial immobilized lipase CALB towards cinnamic acids and its derivative has been studied. Using cinnamic acid as substrate, the reaction rate constants (1.95 h-1 mM-1 for ethanol and ...
Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite Marković, Smilja; Stanković, Ana; Dostanić, Jasmina; Veselinović, Ljiljana; Mančić, Lidija; Škapin, Srečo Davor; Dražić, Goran; Janković Častvan, Ivona; Uskoković, Dragan (Royal Society of Chemistry, 2017)Mechanical milling of commercial ZnO and SnO2 was used to produce a ZnO/SnO2 composite with a high density of surface defects; in particular, zinc interstitials (Zni) and oxygen vacancies (VO). To determine the impact of ...
Filipović, Suzana (Paris : Atlantis Press, 2017)The intensive progress in electronics, especially telecommunication and mobile phone in 1990s, was the main driving force for the extensive research and development of microwave ceramics. These materials are often used in ...