نتایج جستجو برای: building materials
تعداد نتایج: 638202 فیلتر نتایج به سال:
Background: This study investigated the γ-rays shielding properties of some building materials in Sudan has been investigated. Materials and Methods: Photons attenuation coefficients and half value layer (HVL) were experimented using Cs-137 and Co-60 sources. The measurements were performed to gauge the intensity of radiation when performed unshielded, the specific thickness of selected sample...
The article presents the results of analysis category “building materials” as one criteria for buildings environmental certification. research aims to study categories “green” certification systems - friendliness and energy efficiency materials used in construction. requirements building international national rating are considered. Particular attention is paid determining most significant char...
All building materials contain various amounts of natural radioactive nuclides. Materials derived from rock and soil contain mainly natural radionuclides of the uranium (238U) and thorium (232Th) series, and the radioactive isotope of potassium (40K). Radiation exposure due to building materials can be divided into external and internal exposure. The external exposure is caused by direct gamma ...
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