Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes
This study investigates the effect of coal fly ash (FA), wollastonite (WO), pumice (PM), and metakaolin (MK) as filler materials in the rheological, mechanical, chemical, and mineralogical properties of a magnesium potassium phosphate cement (MKPC), designed for the encapsulation of low and intermed...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/2/679 |
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| author | Mikel Dieguez Ana Isabel Ruiz Jaime Cuevas María Cruz Alonso Inés García-Lodeiro Raúl Fernández |
| author_facet | Mikel Dieguez Ana Isabel Ruiz Jaime Cuevas María Cruz Alonso Inés García-Lodeiro Raúl Fernández |
| author_sort | Mikel Dieguez |
| collection | DOAJ |
| description | This study investigates the effect of coal fly ash (FA), wollastonite (WO), pumice (PM), and metakaolin (MK) as filler materials in the rheological, mechanical, chemical, and mineralogical properties of a magnesium potassium phosphate cement (MKPC), designed for the encapsulation of low and intermediate level radioactive wastes containing reactive metals. Workability, compression strength, dimensional stability, pH, chemical composition, and mineralogical properties were studied in different pastes and mortars of MKPC with a fixed molar ratio of MgO/KH<sub>2</sub>PO<sub>4</sub> = 1. No new mineral phases were found with the addition of the fillers, denoting their low chemical impact on the MKPC system. Moreover, all formulations with a water/cement mass ratio of <0.65 presented compressive strengths higher than 30 MPa after 90 days, and pH values lower than 8.5, corresponding to the passivation zone of aluminum corrosion. |
| first_indexed | 2024-03-09T11:49:18Z |
| format | Article |
| id | doaj.art-3ec4024b89d6497ba6ab7d045aaea18e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:49:18Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3ec4024b89d6497ba6ab7d045aaea18e2023-11-30T23:16:41ZengMDPI AGMaterials1996-19442023-01-0116267910.3390/ma16020679Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive WastesMikel Dieguez0Ana Isabel Ruiz1Jaime Cuevas2María Cruz Alonso3Inés García-Lodeiro4Raúl Fernández5Department of Geology and Geochemistry, Faculty of Sciences, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, SpainDepartment of Geology and Geochemistry, Faculty of Sciences, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, SpainDepartment of Geology and Geochemistry, Faculty of Sciences, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, SpainEduardo Torroja Institute for Construction Sciences (IETcc-CSIC), c/Serrano Galvache 4, 28033 Madrid, SpainEduardo Torroja Institute for Construction Sciences (IETcc-CSIC), c/Serrano Galvache 4, 28033 Madrid, SpainDepartment of Geology and Geochemistry, Faculty of Sciences, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, SpainThis study investigates the effect of coal fly ash (FA), wollastonite (WO), pumice (PM), and metakaolin (MK) as filler materials in the rheological, mechanical, chemical, and mineralogical properties of a magnesium potassium phosphate cement (MKPC), designed for the encapsulation of low and intermediate level radioactive wastes containing reactive metals. Workability, compression strength, dimensional stability, pH, chemical composition, and mineralogical properties were studied in different pastes and mortars of MKPC with a fixed molar ratio of MgO/KH<sub>2</sub>PO<sub>4</sub> = 1. No new mineral phases were found with the addition of the fillers, denoting their low chemical impact on the MKPC system. Moreover, all formulations with a water/cement mass ratio of <0.65 presented compressive strengths higher than 30 MPa after 90 days, and pH values lower than 8.5, corresponding to the passivation zone of aluminum corrosion.https://www.mdpi.com/1996-1944/16/2/679magnesium phosphate cementmetallic radioactive wastecement filler |
| spellingShingle | Mikel Dieguez Ana Isabel Ruiz Jaime Cuevas María Cruz Alonso Inés García-Lodeiro Raúl Fernández Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes Materials magnesium phosphate cement metallic radioactive waste cement filler |
| title | Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes |
| title_full | Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes |
| title_fullStr | Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes |
| title_full_unstemmed | Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes |
| title_short | Evaluation of Fillers for Magnesium Potassium Phosphate Cement (MKPC) for the Encapsulation of Low and Intermediate Level Metallic Radioactive Wastes |
| title_sort | evaluation of fillers for magnesium potassium phosphate cement mkpc for the encapsulation of low and intermediate level metallic radioactive wastes |
| topic | magnesium phosphate cement metallic radioactive waste cement filler |
| url | https://www.mdpi.com/1996-1944/16/2/679 |
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