Program and the Book of Abstracts (PDF) - Mrs-serbia.org.rs

Tenth Young Researchers Conference – Materials Science and Engineering
December 21-23, 2011, Hall 2, SASA, Knez Mihailova 35 & 36, Belgrade, Serbia
IX/1
Z-scan measurement of nonlinear optical properties
Ana Joža, Bojan Dakić, Dragan Z. Stupar, Jovan Bajić,
Miloš P. Slankamenac, Miloš Živanov
University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia
This paper presents measurement of nonlinear optical properties of materials by using single
beam z-scan technique. Theoretical explanation of the technique and experimental results are given.
As a light source continuous wave green laser at 532 nm is used. The sample of a material is moved
along z-axis in range of 15 cm experiencing different levels of irradiance. This technique is based
on separate measurements of light transmission and absorption through material, with and without
aperture, respectively. The results are fitted by using LabVIEW software in order to obtain
nonlinear refractive index and nonlinear absorption coefficient of the investigated material.
IX/2
Pelletized fly ash – a new aggregate for lightweight concrete
Dragoljub Birčević 1 , Sanja Bajić 1 , Radmila Gaćina 1 ,
Lukaš Koval 2 , Rudolf Tomanec 1
1 Faculty of Mining and Geology, University of Belgrade, Serbia,
2 Technical University Ostrava, Czech Republic
This work presents detailed characterization of fly ash from the Nikola Tesla Steam Power Plant
B, Obrenovac, Serbia, and the ash pelletization process using Portland cement and bentonite clay
binders in 5 ÷ 35 percent proportions. Each pellet-size fractions is tested on the compressive
strength, impact strength, attrition and other mechanical properties. Pellets produced using bentonite
are calcified and sintered at the temperature of 1100ºC. Finally, the recommended applications of
palletized fly ash are the aggregate for lightweight concrete in the building-materials industry, in
agriculture, for soil stabilization in landfills, or in landscaping.
36