Design and construction of Railway Road Bridge in Novi Sad

Aleksandar Bojović, TEO at DEL ING d.o.o.
Novak Novaković, Structural Engineer at DEL ING d.o.o.

More about the project: www.deling.rs/lang_en/references/bridges/dunav_zeleznicki.html

Studies on eco-friendly concrete incorporating waste as artificial aggregate

M.Sc. Slobodan Šupić - Teaching Assistant at Faculty of Technical Sciences, University of Novi Sad

The purpose of this research is to create coarse artificial aggregate by alkali activation of fly ash for its use in cement concrete instead of natural aggregate. In this phase of study, the influence of the methods of production of coarse AAFA aggregate on its own characteristics and on basic properties of cement concrete has been investigated.  The objective of using domestic waste material as agglomerated by-product (aggregate) is to avoid using excessive amount of raw materials for various construction purposes. So far Serbia has dominantly used river aggregate for the production of concrete. It has caused problems with hydro-geological profiles of the riverbeds and consequently influenced research activities related to finding new sources of aggregates. On the other hand, approximately 7 million tons of fly ash is annually produced in thermal power plants in Serbia and only 3% is used in the cement industry. Until now about 300 million tons of the fly ash is disposed in landfills, occupying large area and generating environmental issues. One of the ways to reduce the fly ash disposal is production of artificial aggregate by alkali activation.  The artificial aggregates production is not only a good alternative for the natural aggregates preservation; it also provides an ecologically sustainable solution regarding waste management. It provides a benefits increase for industry branches that produce waste materials as they can turn them into a valuable resource.


Lecturer CV is available here.

Numerical simulations of the structural behavior under fire conditions

M.Sc. Igor Džolev - Teaching Assistant at the Faculty of Technical Sciences, University of Novi Sad

In addition to prescriptive and testing methods, current technical development allows the assessment of thermal and structural response to fire by calculation. Numerical codes considered for the analyses need to be able to incorporate realistic behavior of materials at elevated temperatures and nonlinear calculation procedures. Specialized software for fire analysis, based on Finite Element Method (FEM), such as SAFIR, VULCAN and OPENSEES are being developed at the universities worldwide. Also, some powerful general purpose commercial software, such as ANSYS and ABAQUS have also been validated by the performed test results. A rapidly growing hardware potential in the past decades has opened possibilities for numerical simulations of complex nonlinear systems to be widely accepted by both research facilities and developing industry.


Lecturer CV is available here.