Optimisation of Fly Ash Pretreatment for Mechanical Strength and Radioactive Safety in Microwave-irradiated Alkali-Activated Materials: Preliminary Results
Kratka vsebina
The construction sector is a major contributor to global carbon emissions, due largely to high-temperature processing and extensive use of raw materials. Alkali-activated materials (AAMs), synthesised below 100 °C from secondary raw materials such as fly ash (FA), offer a more sustainable solution. This study investigates the mechanical performance and radionuclide presence of theoretically chemically optimal alkali-activated FA, based on three conditions: untreated FA, FA sieved below 200 µm, and FA treated thermally at 550 °C. Both the sieving and thermal treatment removed the organic content from the FA, resulting in a significant improvement in the compressive strength of the AAMs. However, in the absence of organic content, microwave irradiation no longer improved the compressive strength. Additionally, sieving below 200 µm also reduced the radionuclide content, offering a simple and effective pathway to high-performance, radwaste-safe building materials, even though the radionuclides themselves did not affect the mechanical performance of the AAM.
Prenosi
Strani
Izdano
Kategorije
Licenca

To delo je licencirano pod Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 mednarodno licenco.





