Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables
This article analyzes the mechanism of the protective layer formation under the action of alkali in a refractory castable when ground quartz sand (GQS) is used as an admixture to produce refractory conventional castables (CC) and medium cement castables (MCC). It was found that, independently of the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Ceramics |
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| Online Access: | https://www.mdpi.com/2571-6131/5/4/75 |
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| author | Valentin Antonovič Rimvydas Stonys Povilas Zdanevičius Romualdas Mačiulaitis Renata Boris Jurgita Malaiškienė |
| author_facet | Valentin Antonovič Rimvydas Stonys Povilas Zdanevičius Romualdas Mačiulaitis Renata Boris Jurgita Malaiškienė |
| author_sort | Valentin Antonovič |
| collection | DOAJ |
| description | This article analyzes the mechanism of the protective layer formation under the action of alkali in a refractory castable when ground quartz sand (GQS) is used as an admixture to produce refractory conventional castables (CC) and medium cement castables (MCC). It was found that, independently of the castable composition, the addition of GQS (2.5%) reduces the degree of K<sub>2</sub>CO<sub>3</sub> dissolution at high temperature, and the released potassium reacts with the silica and forms a viscous potassium silicate glass, which reduces the mobility of alkali. The liquid phase formed filled some of the open pores and hindered the penetration of potassium into the deeper layers of the refractory castable. The thickness of the formed protective layer, after three cycles of the alkaline corrosion test, varies from 700 µm up to 1300 µm, depending on the castable composition. |
| first_indexed | 2024-03-09T17:12:44Z |
| format | Article |
| id | doaj.art-d3a8fb726a044f66b91cb59b9758e764 |
| institution | Directory Open Access Journal |
| issn | 2571-6131 |
| language | English |
| last_indexed | 2024-03-09T17:12:44Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Ceramics |
| spelling | doaj.art-d3a8fb726a044f66b91cb59b9758e7642023-11-24T13:57:00ZengMDPI AGCeramics2571-61312022-11-01541051106510.3390/ceramics5040075Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory CastablesValentin Antonovič0Rimvydas Stonys1Povilas Zdanevičius2Romualdas Mačiulaitis3Renata Boris4Jurgita Malaiškienė5Laboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaLaboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaLaboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaLaboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaLaboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaLaboratory of Composite Materials, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, LithuaniaThis article analyzes the mechanism of the protective layer formation under the action of alkali in a refractory castable when ground quartz sand (GQS) is used as an admixture to produce refractory conventional castables (CC) and medium cement castables (MCC). It was found that, independently of the castable composition, the addition of GQS (2.5%) reduces the degree of K<sub>2</sub>CO<sub>3</sub> dissolution at high temperature, and the released potassium reacts with the silica and forms a viscous potassium silicate glass, which reduces the mobility of alkali. The liquid phase formed filled some of the open pores and hindered the penetration of potassium into the deeper layers of the refractory castable. The thickness of the formed protective layer, after three cycles of the alkaline corrosion test, varies from 700 µm up to 1300 µm, depending on the castable composition.https://www.mdpi.com/2571-6131/5/4/75refractory castablealuminosilicateground quartz sandalkali resistanceprotective layer |
| spellingShingle | Valentin Antonovič Rimvydas Stonys Povilas Zdanevičius Romualdas Mačiulaitis Renata Boris Jurgita Malaiškienė Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables Ceramics refractory castable aluminosilicate ground quartz sand alkali resistance protective layer |
| title | Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables |
| title_full | Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables |
| title_fullStr | Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables |
| title_full_unstemmed | Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables |
| title_short | Analysis of the Formed Protective Layer Inhibiting Alkali Corrosion in Aluminosilicate Refractory Castables |
| title_sort | analysis of the formed protective layer inhibiting alkali corrosion in aluminosilicate refractory castables |
| topic | refractory castable aluminosilicate ground quartz sand alkali resistance protective layer |
| url | https://www.mdpi.com/2571-6131/5/4/75 |
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