Fuels are substances that release heat energy during combustion due to the oxidation process that occurs. In order for a substance to serve as fuel, it is important that it has a high calorific value, which is most affected by the carbon content. Sulfur has a very small effect on this characteristic of the fuel but is considered as a negative compo...

By Lamija Mujkanović, Nadira Bušatlić, Nedžad Haračić, Nevzet Merdić

Two clays from deposits located in the region of Central Bosnia, and kaolin obtained from a localspark plug and technical ceramics factory were calcined at 800, 900, and 1000 ºC. The pozzolanicactivity of calcined raw materials was determined using the P test. Calcined clay from the depositBilalovac showed slightly better reactivity compared t...

By Marina Jovanović, Adnan Mujkanovic, Nadira Bušatlić, Nedžad Haračić, Amina Čaušević

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

Hydrocracked base oil raw material (BORM) is the basis for the production of hydrocracked baseoils (HC-base oils) in the company „Modriča Oil Refinery“, which is engaged in the production ofHC-base oils, various motor and industrial lubricating oils, and lubricating greases. Theproduction of the mentioned HC-base oils consists of four p...

By Azra Halilović, Ilhan Bušatlić, Šefkija Botonjić, Nadira Bušatlić, Edin Zolotić

This paper presents an experimental study to evaluate the possibility of CEM IV 42,5N producing by increasing the specific cement surface from 3180 to 3850 cm2 /g. In this paper, fly ash is used as a cement admixture because fly ash possesses both hydraulic and pozzolanic properties. If one part of the clinker, as a major cement admixture, is repla...

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

In this paper, the influence of Na2SiO3 /NaOH ratio on the compressive strength of fly ash - based geopolymers was tested. The fly ash from thermal power plant Stanari near Doboj, BiH is used.The ratio of alkali activator to fly ash (AA / FA ratio) was constant in all samples and it was 0.8. A 12M NaOH solution was used. The heat treatment temperat...

By Nadira Bušatlić, Ilhan Bušatlić, Nevzet Merdić, Dženana Smajić-Terzić

This article talks about the possibility of production of portland-composite cement in cement plant Kakanj in accordance with the requirements of EN 197-1. By that standard cement class 52,5N must have a compressive strenght greater or equal 20MPa after 2 days, and after 28 days greater or equal 52,5MPa. Portland-composite cement is ...

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

In recent decades the production of chemically bonded refractory materials has been clearely increased. In this paper was examined the added amount effection of 50% solution of mono aluminum phosphate (MAP) as a binder in refractory concretes. Quartz, sand and chamotte are used as fillers. Research has shown that the bond between the filler and the...

By Nadira Bušatlić, Ilhan Bušatlić, Mitar Perušić