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The ionizing radiation dose from building materials containing fly ash (FA) has been studied. Ceramic products, plates, bricks and blocks containing fly ash have been studied and compared to other construction materials for both natural radionuclides content (NORM), radon exhalation rate and gamma radiation dose .The total radiation dose due to walls built from ceramic blocks containing FA (45% fly ash), was found to be lower than radiation doses due to walls of other construction materials, Assuming two walls (the exterior ones) built of this ceramic material the doses are 0.09-0.13 mSv/y for ceramic materials densities of 800 and 1200 kg/m 3 , respectively.

The study of natural radionuclides and radon exhalation rate in ceramic materials containing fly ash developed in Israel