The concentrations of primordial radionuclides (226Ra. 232Th and 40K) in commonly used building materials (brick. cement and sand). the raw materials of cement and the by-products of coal-fired power plants (fly ash) collected from various manufacturers and suppliers in Bangladesh were determined via gamma-ray spectrometry using an HPGe detector. https://stehlenautomotivers.shop/product-category/truck-bed-mat/