C. Basyigit

Prediction of photon attenuation coefficients of heavy concrete by fuzzy logic

The fuzzy logic (FL) model to determine the radiation shielding properties of concretes containing barite in the ratio of 0%, 50%, 60%, 70%, 100%, and different water-to-cement ratio (w/c) have been developed. For training of the networks in the model, w/c and barite ratio were input, while the photon attenuation coefficient was output. The FL results were compared with experimental results and correlation between experiment and FL was compared with the correlation between experiment and calculation (XCOM). It was found that the correlation between FL and experiment was better than the correlation between XCOM and experiment.

Investigating Radiation Shielding Properties of Different Mineral Origin Heavyweight Concretes

The radiation although has hazardous effects for human health, developing technologies bring lots of usage fields to radiation like in medicine and nuclear power station buildings. In this case protecting from undesirable radiation is a necessity for human health. Heavyweight concrete is one of the most important materials used in where radiation should be shielded, like those areas. In this study, used heavyweight aggregates of different mineral origin (Limonite, Siderite), in order to prepare different series in concrete mixtures and investigated radiation shielding properties. The experimental results on measuring the radiation shielding, the heavyweight concrete prepared with heavyweight aggregates of different mineral origin show that, are useful radiation absorbents when they used in concrete mixtures.

Image processing technique (IPT) to determine radiation shielding

Radiation has been existed since from the beginning of the universe due to the long half-life of the radionuclides. Technological development can produce an extra radiation to environment. Both natural and man made radiation is called background radiation and it is important to be protected from this radiation. There are three main ways to be protected, namely: time, distance and shielding. Although lead is a standard radiation shielding material, concrete is one of the main materials used in construction building construction. Besides there are different ways to test radiation shielding properties of materials, in this study an alternative way has been proposed. Here the mass attenuation coefficients (@m/@r) of three different types of concretes and lead have been estimated by processing imaged roentgen film. The obtained results were compared with the calculation obtained using XCOM.

Investigation of radiation Shielding Properties of of Some Building Materials

The radiation shielding properties of different types of building materials were investigated against gamma‐radiation.

Investigation of photon attenuation coefficients for marble

The total linear attenuation coefficients micro (cm(-1)) have been obtained using the XCOM program at photon energies of 1 keV to 1 GeV for six different natural marbles produced in different places in Turkey. The individual contribution of photon interaction processes to the total linear attenuation coefficients for marble has been investigated. The calculated results were also compared with the measurements. The results obtained for marble were also compared with concrete.

Some engineering properties of heavy concrete added silica fume

Many different types of building materials have been used in building construction for years. Heavy concretes can be used as a building material for critical building as it can contain a mixture of many heavy elements. The barite itself for radiation shielding can be used and also in concrete to produce the workable concrete with a maximum density and adequate structural strength. In this study, some engineering properties like compressive strength, elasticity modules and flexure strength of heavy concretes’ added Silica fume have been investigated.

A new approach to compressive strength assessment of concrete: Image processing technique

In this study, the compressive strength levels of different concrete classes were estimated using an image processing technique. A series of different concretes were prepared by applying different water/cement ratios. The percentages of cement matrix, aggregate, and air void were calculated by processing the images obtained from the surfaces of hardened concretes. The relation between the parameters that were calculated via image processing and the compressive strengths of the concretes produced were examined. By this means, the compressive strength levels of concretes were estimated one by one via the developed image processing software and ImageJ. It was found that the compressive strength levels of concretes can be estimated with a high level of correlation by using the values obtained via the image processing technique. The developed software can be used to estimate the compressive strength levels of concretes. In addition, in considering concrete age, cure conditions, and relative humidity, the metho...

A TEST OF RADIATION ABSORPTION CHARACTERISTICS OF BLAST-FURNACE SLAG CONCRETE

As the radiation has started to be used in a variety of different fields its protection becomes important and different materials have been developed to be used in this purposes. In the development of concrete several different materials can be used. Blast furnace slag, iron and steel mills are some of them. The 2% of the world production in iron-steel is made in Turkey. In this study, as a binding material, Isparta Golta? Cement Inc. s produced, type of cement CEM I 42.5 R and Iskenderun Iron-Steel Factory has been supplying the blast furnace slag was used. The gamma rays absorption properties of blast furnace slag concrete NaI (Tl) detector measured with gamma spectroscopy system, the results will be discussed.