Austempered ductile iron is the last addition to the group of ductile irons obtained by isothermalimprovement of classic ductile iron. Austempered nodular cast iron has improved mechanicalproperties and a different matrix microstructure compared to known iron-based castings. Thistype of casting is obtained by isothermal improvement - austempering, ...

By Adisa Burić, Belma Fakić, Edib Horoz, Hasan Avdušinović, Raza Sunulahpašić

Steel cooling is an important technological operation because the final microstructure of the steel,and therefore its properties, depends on the cooling rate. The speed of steel cooling depends onnumerous factors, one of which is the movement of the cooling media. This paper presents theresults of testing the influence of mixing the cooling media o...

By Almaida Gigovic-Gekic, Hasan Avdušinović, Amna Hodzić, Branka Muminović

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

This paper examines the possibility of producing metallurgical cement type CEM III/A 42.5N at theKakanj Cement Factory. The tested samples contain respectively 46%, 41%, and 38% of granulatedblast furnace slag and the rest is clinker. According to the test results, all cement samples meet theEN 197-1 standard in terms of physical-mechanical propert...

By Nevzet Merdić, Nedžad Haračić, Ilhan Bušatlić, Nadira Bušatlić, Adnan Mujkanovic

According to new EN 197-5 is possible to combine clinker with blast furnace slag, silica fume,pozzolana, fly ash, burnt shale, and limestone from 36 – 50% while clinker content should be from50 – 64%. In this paper are presented results of laboratory testing concerning CEM II/C-M(S+W) production where a sample is prepared by mixing 50% ...

By Nedžad Haračić, Nevzet Merdić, Ilhan Bušatlić, Nadira Bušatlić

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

Particulate matter enters the atmosphere as a result of human activity, as well as natural processes.Since we still cannot influence natural processes, reducing the concentration of floating particlesis possible only by adjusting human activity. The emission of solid particles occurs during a largenumber of everyday activities. Depending on the act...

By Aida Šapčanin, Aida Hasanović, Farzet Bikić

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