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Radiation Shielding Properties of Mortars and Plasters Used in Historical Buildings

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Özavci S., Çetın B.
Acta Physica Polonica A
|
2017
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vol. 132
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issue 3
986-987
EN
In this study, the radiation absorption properties of mortars and plasters used in historical buildings have been investigated. Studied lime concretes contained such additives as brick dust, fertilizer, wet lime, wool, egg white, bone meal, rice, casein, whey, bone ash and tree leaf juice, in different concentrations. The linear attenuation coefficients of gamma rays in lime concretes have been measured at 662, 1773 and 1332 keV. The gamma rays have been obtained from ¹³⁷Cs and ⁶⁰Co sources and the measurements have been performed using a gamma spectrometer, based on a 3"× 3" NaI(Tl) detector, connected to 16384-channel multi-channel analyser.
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Usability of Fuzzy Logic Modeling for Prediction of Fresh Properties of Self-Compacting Concrete

100%
Beycioğlu A., Gültekin A., Aruntaş H.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
1140-1141
EN
The aim of this study is to investigate the usability of fuzzy logic modelling for prediction of fresh properties of self-compacting concrete. In the modelling process, the percentage of fly ash and the percentage of granulated blast furnace slag, as replacement of cement, the percentage of micronized calcite, as replacement of total aggregate, were used as inputs. The slump flow diameter and time and also the V-funnel time were used as outputs. Results show that fuzzy logic modelling may be a useful approach to predict fresh properties of self-compacting concrete, containing fly ash, granulated blast furnace slag and micronized calcite.
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