Authors:
Th. Perraki National Technical University of Athens, Min. Eng. Dept. 9 Heroon Polytechniou St., 15773 Athens, Greece 9 Heroon Polytechniou St., 15773 Athens, Greece

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G. Kakali National Technical University of Athens, Chem. Eng. Dept., Labs of Inorganic and Analytical Chemistry 9 Heroon Polytechniou St., 15773 Athens, Greece 9 Heroon Polytechniou St., 15773 Athens, Greece

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E. Kontori 1National Technical University of Athens, Min. Eng. Dept 9 Heroon Polytechniou St., 15773 Athens, Greece 9 Heroon Polytechniou St., 15773 Athens, Greece

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Summary  

The pozzolanic reactivity of thermally treated zeolites was studied on the basis of the Chapelle test combined with X-ray diffraction (XRD) and Fourier Transform (FTIR) spectroscopy, as well as thermogravimetric analysis (TG/DTG) and differential thermal analysis (DTA). The raw zeolite samples are from the Pentalofos area, Thrace, NE Greece. Their main mineral constituent is 'heulandite type-II', an intermediate type of the heulandite-clinoptilolite isomorphous series. Calcination of the samples was carried out up to 400, 500, 600, 700 and 1000C for 15 h. The changes were recorded using the above methods. The deformation of the zeolite crystal lattice starts at about 400C and proceeds as the temperature of thermal treatment rises. The thermal treatment of zeolite at 400C improves its pozzolanic reactivity and accelerates the reaction with Ca(OH)2.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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