Gray cast iron belongs to the group of iron casts that contain graphite particles in the microstructure. Graphite particles in gray cast iron have the shape of lamellae and are connected to each other. The specific combination of properties of gray cast iron, which is satisfactory for many applications, and simple and cheap productio...

By Anida Henjaković, Hasan Avdušinović, Amir Muslić

Steel S690 QL is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of ReH of 690 MPa and with guaranteed toughness (Charpy) for rolled plates with a thickness of 3 to 50 mm. This paper presents the examination and analysis of the microstructure and grain size results after quenching an...

By Mirsada Oruč, Aida Imamović, Almaida Gigovic-Gekic, Milenko Rimac

The strength development of concrete containing ground granulated blast-furnace slag (GGBS), aby-product of iron in blast-furnace, as a partial substitute for cement,was experimentally studied.Levels of replacement of cement by slag were 12.5 %, 25 %, 37.5 %, and 50 % by weight ofcement. Slag taken immediately after it was discharged from the blast...

By Adnan Mujkanovic, Marina Jovanović, Nadira Bušatlić, Amel Zahirović, Anesa Bitić, Nevzet Merdić

We have introduced a theory for the calculation of thermodynamic characteristics for somecharacteristic nanostructures (ultrathin films and superlattices), using the adapted method of twotimetemperature Green's functions. In this paper, we have determined the coefficient of thermalconductivity using the definition of free energy and then compared t...

By Siniša M. Vučenović, Jovan P. šetrajčić

The paper presents data on emissions of analyzed pollutants into the air (SO2, NOx, CO, VOC,NH3, PM10, PM2.5, PAH, Pb, Cd, and Hg) by sector (industry and energy, small combustion plants,road traffic and services-agriculture and animal husbandry), and by cities and municipalities inthe area of the Zenica-Doboj Canton. Based on the analyzed data, it...

By Vehid Birdahić, Muvedet Šišić, Nusret Imamović, Halim Prcanović, Mirnes Duraković

The paper describes the research methodology of the heat generated by the biologicaldecomposition of a mixture of sludge from WTP (wastewater treatment plant) and biowaste and itsuse outside the system for a controlled biodegradation process. Earlier research in this area definedthe optimal mixtures of sludge and biowaste that ensure quality manage...

By Muvedet Šišić, Vehid Birdahić, Sanela Beganović, Mirnes Duraković, Farzet Bikić

Wood is renewable, recyclable, climate-friendly material, and presents an important segment inachieving circular economy and sustainability concepts. To be able to link these two concepts,production and consumption systems need to transform towards sustainability. Wood-basedproducts play a role in mitigating climate change by reducing carbon from t...

By Petar Ćurić, Jelena Obranković, Andreja Pirc-Barčić

The paper describes the behavior of welded joints of NN-70 steel in the presence of a cracking error when bending with impact force. The experiment was performed with three groups of test tubes, depending on the cut-off point of the test tube notch with the tip of the crack in BM, in WM and in HAZ. The test method used was conducted on the instrume...

By Nermin Bišćević

The basic characteristics of the chemical composition of steel with improved machinability (X8CrNiS18-9) are the increased content of sulphur (0.15-0.45%), phosphorus (0.07-0.11%) and manganese (0.5-1.5%). Sulphur by creating sulphide inclusions reduces friction and cutting resistance, and increases the brittleness of the chip.Considering its harmf...

By Derviš Mujagić, Aida Imamović, Mustafa Hadžalić

Mine development imposes very high technical requirements of the mine hoisting equipment in terms of speed of transport. To meet these requirements it is necessary to properly design the structural elements of mine hoisting equipment which means that they must have the proper characteristics of the materials from which they are made such as mechani...

By Mustafa Hadžalić, Mirsada Oruč, Raza Sunulahpašić