New Approach for the Determination of Radiological Parameters on Hardened Cement Pastes with Coal Fly Ash.

ABSTRACT: Supplementary cementitious materials (SCMs) in industrial waste and by-products are routinely used to mitigate the adverse environmental effects of, and lower the energy consumption associated with, ordinary Portland cement (OPC) manufacture. Many such SCMs, such as type F coal fly ash (FA), are naturally occurring radioactive materials (NORMs). 226Ra, 232Th and 40K radionuclide activity concentration, information needed to determine what is known as the gamma-ray activity concentration index (ACI), is normally collected from ground cement samples. The present study aims to validate a new method for calculating the ACI from measurements made on unground 5 cm cubic specimens. Mechanical, mineralogical and radiological characterisation of 28-day OPC + FA pastes (bearing up to 30 wt % FA) wer

SUBMITTER: Moreno de Los Reyes AM 

PROVIDER: S-EPMC7864329 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature