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Determination of Radiation Shielding of Concrete Produced from Portland Cement with Boron Additives

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Davraz M., Pehlıvanoğlu H., Kilinçarslan Ş., Akkurt İ.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
702-704
EN
Concrete is a material which is widely used for neutron shielding in such building constructions as nuclear power stations, particle accelerators and medical hospitals. Concrete is very significant for neutron shielding, because is contains some elements which help to moderate very penetrative fast neutrons. Boron increases the neutron shielding effectiveness of concretes. Boron can be added to concrete in different ways, by addition of boron to the water, used in concrete, or by addition of boron containing natural minerals. In this study, three samples of concrete were produced using B₂O₃ additives material, boron-modified active belite and Portland cement. Neutron absorption coefficients of the produced three different types of concrete samples were obtained through experiments. It is concluded that the addition of boron to concrete is an alternative option to be used for the purposes of neutron shielding.
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Influence of High Temperature on Concrete Produced from Portland Cement with Boron Additives

100%
Davraz M., Pehlıvanoğlu H., Kilinçarslan Ş.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
872-874
EN
The boron compounds have been widely used as additives in the production of cement and concrete to enhance their engineering properties. In this study, three series of concrete specimens were produced using B₂O₃ additive materials, boron modified active belite cement and Portland cement. After 28 days of curing period the specimens were exposed to temperatures of 250, 500 and 750°C. Mass loss and compressive strength were determined and recorded after the specimens were cooled to room temperature. It was concluded that the effect of the boron becomes more apparent at high temperatures.
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