PARTIAL REPLACEMENT OF CEMENT WITH CALCINED CLAYS FROM CENTRAL BOSNIA
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
STRENGTH DEVELOPMENT OF CONCRETE CONTAINING GROUND GRANULATED BLAST FURNACE SLAG FROM ARCELORMITTAL ZENICA AS A PARTIAL CEMENT REPLACEMENT
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
CHAMOTTE REFRACTORY CASTABLE PROPERTIES ENHANCING BY OPTIMIZING PARTICLE SIZE DISTRIBUTION
The paper examined the changes in properties of conventional castables composed of a mixture of calcium-aluminate cement and chamotte caused by changes in the particle size distribution. Properties of castable with 20 % cement and „as received“ chamotte were compared with castableofparticle size distribution adapted to the calculated di...
By Marina Jovanović, Adnan Mujkanovic
EFFECT OF DISPERSANT ON GROUND GRANULATED BLASTFURNACE SLAG PARTICLE SIZE DISTRIBUTION DETERMINED BY LASER DIFFRACTION METHOD
Particle size distribution measurements were performed on ground granulated blastfurnace slag by laser diffraction with the powder dispersed in distilled water with sodium hexametaphosphate used as dispersing agent, as well as in pure distilled water and propan-2-ol. Two samples of slag with Blaine fineness 4700 cm2 /g and5500 cm2 /g were tested.Th...
By Adnan Mujkanovic, Marina Jovanović, Amel Zahirović, Mustafa Hadžalić, Nevzet Merdić
EFFECT OF NANOSILICA ADDITION ON CONCRETE POROSITY AND SORPTIVITY
This paper presents an experimental investigation into the effect of nanosilica addition to porosity and capillary absorption of concrete. Three concrete mixtures 0%, 2%, and 4% nanosilicaby weight of cementweretested.The procedure described in ASTM C642-06 was used to determine the total volume of permeable voids.Water absorption and the rate of w...
By Adnan Mujkanovic, Anesa Ključanin, Marina Jovanović, Amel Zahirović, Amna Karić, Nevzet Merdić
THE EFFECTS OF ADDITIVES ON THE PROPERTIES OF BRICKCLAY PRODUCTS
The effect of fly ash, coal dust and limestone on the properties of brick products are presented in this paper. Three kinds of clay were used to test the effect of additives. There were investigated the effect of additives on the behaviour of clays during drying and firing (shrinkage and loss of weight), and the properties of fired samp...
By Marina Jovanović, Adnan Mujkanović, Erna Tutić, Vedija Karalić
A REVIEW OF THE METHODS FOR PROPORTIONING SELF-COMPACTING CONCRETE
For the production of self-compacting concrete for a specific application, with desired properties in fresh and hardened state, it is necessary to combine the constituent materials in the optimum proportions. The proportioning of self-compacting concrete has to start with defining the required properties. For a particular application, a self-compac...
By Adnan Mujkanović, Ilhan Bušatlić, Marina Jovanović, Dženana Bečirhodžić
THE EFFECT OF DIFFERENT TYPES OF FLY ASH ON SELFCOMPACTING CONCRETE PROPERTIES
In this paper the effect of two different fly ash types on the properties of self-compacting concrete in fresh state and hardened state was investigated: fly ash from Thermal power plant “Kakanj” and fly ash from Thermal power plant “Tuzla”. The results of testing fresh self-compacting concrete properties show that addition ...
By Adnan Mujkanović, Ilhan Bušatlić, Marina Jovanović, Dženana Bečirhodžić
AN OVERVIEW OF PORE FORMING ADDITIVES USAGE IN FIRED CLAY BRICKS
For the production of vertically perforated bricks with very good thermal insulation properties it is necessary to increase porosity of ceramic body. The most effective way to achieve this is the addition of organic substances into the clay mass. During the firing process combustion of these substances occures, leaving behind a large number of fine...
By Adnan Mujkanovic, Marina Jovanović
EFFECT OF ADDITION OF COAL FROM COAL MINE “KAKANJ” ON PROPERTIES OF BRICK CLAY “RAPAJLO”
A coal dust is added to brick clay mainly to save energy and increase porosity. This paper examines the influence of coal from Coal mine "Kakanj", in the amount of 10% and 20%, on some physical and technological properties of brick clay "Rapajlo". The impact of coal on the plasticity of clay, and the characteristics of dried and fired samples was i...
By Marina Jovanović, Adnan Mujkanovic, Mirsada Rizvanovic, Merima Brkić