| Title: | Optimisation of fly ash pretreatment for mechanical strength and radioactive safety in microwave-irradiated alkali-activated materials : preliminary results |
|---|
| Authors: | ID Horvat, Barbara (Author)
ID Železnik, Nadja (Author)
ID Petrič, Lara (Author)
ID Tominc, Sara (Author) |
|---|
| Files: |  URL - Source URL, visit https://press.um.si/index.php/ump/en/catalog/book/1108/chapter/1124
 PDF - Presentation file, download (549,86 KB)
MD5: 006BC16B742A0DF274A0BE057F6AFAD0
URL - Research data, visit https://doi.org/10.5281/zenodo.16531514
|
|---|
| Language: | English |
|---|
| Typology: | 1.08 - Published Scientific Conference Contribution |
|---|
| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
|
|---|
| Abstract: | The study investigates the optimisation of fly ash (FA) pretreatment for producing alkali-activated materials (AAMs) with high mechanical strength and reduced radioactive content. Three FA conditions were compared: as-received, sieved below 200 μm, and treated thermally at 550 °C. Both the sieving and thermal treatment removed the residual cellulose effectively, enhancing the compressive strength significantly, while the microwave irradiation improved the strength only in the as-received FA containing organic content. Sieving below 200 μm also reduced the detectable radionuclides, providing a simple, energy-efficient and low-carbon approach to synthesising high-performance, radwaste-safe AAMs. The preliminary results highlight sieving as a promising method to produce environmentally sustainable construction materials from radioactive FA. |
|---|
| Keywords: | alkali-activated materials, radioactive fly ash, naturally occurring radioactive material, radionuclide separation, microwave irradiation, circular economy |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Publication date: | 21.04.2026 |
|---|
| Publisher: | University of Maribor, University of Maribor Press, University of Maribor, Faculty of Chemistry and Chemical Engineering |
|---|
| Year of publishing: | 2026 |
|---|
| Number of pages: | Str. 12-23 |
|---|
| PID: | 20.500.12556/DiRROS-29402  |
|---|
| UDC: | 620.1/.2 |
|---|
| DOI: | 10.18690/um.fkkt.1.2026.2 |
|---|
| COBISS.SI-ID: | 276254723 |
|---|
| Copyright: | © authors of proceedings and Potrč, Bogataj, Kravanja, Novak Pintarič (editors) |
|---|
| Note: |
|
|---|
| Publication date in DiRROS: | 15.05.2026 |
|---|
| Views: | 28 |
|---|
| Downloads: | 17 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
