Speaker
Description
The aim of this study was determination of physical-chemical, radiological and structural characteristics of kaolin, fly ash and products of alkali-activated as well as thermally treated kaolin (alkali activated materials). Also, the objective of presented research was application in the field of construction and civil engineering as green cements. The objective of presented research was to investigate the possibility of kaolin (raw material) or fly ash (industrial waste) application for obtaining geopolymer material as a relatively new in building material industry. Physical-chemical and structural characterization was conducted using X ray diffraction (XRD), Fourier transform infra-red (FTIR) and X ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and High-resolution transmission electron microscopy (HR-TEM). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin, fly ash and geopolymer were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), calculated in accordance with the UNSCEAR 2000 report. Kaolin was thermally treated on 750°C, and specific activity of natural radionuclides in metakaolin increased up to 1.6, while specific activities in geopolymer were significantly reduced.
