Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants
To address some of the gaps in the present understanding of the behavior of new supplementary cementitious materials such as bottom ash (BA) from biomass-fired electric power plants in cement manufacture, this study explored the effect of this promising material on the sulfate resistance of the end...
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/24/8982 |
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| author | José M. Medina María Isabel Sánchez de Rojas Isabel F. Sáez del Bosque Moisés Frías César Medina |
| author_facet | José M. Medina María Isabel Sánchez de Rojas Isabel F. Sáez del Bosque Moisés Frías César Medina |
| author_sort | José M. Medina |
| collection | DOAJ |
| description | To address some of the gaps in the present understanding of the behavior of new supplementary cementitious materials such as bottom ash (BA) from biomass-fired electric power plants in cement manufacture, this study explored the effect of this promising material on the sulfate resistance of the end product. Cement paste prepared with 10% or 20% (previously characterized for mineralogy and chemical composition) BA was Köch–Steinegger tested for sulfate resistance. The hydration products, in turn, were analyzed before and after soaking the reference and experimental cements in sodium sulfate to determine whether the use of the addition hastened microstructural, mineralogical, or morphological decay in the material. The 56 days findings showed that the presence of BA raised binder resistance to sulfate attack. Köch–Steinegger corrosion indices of 1.29 and 1.27 for blended cements OPC + 10 BA and OPC + 20 BA, respectively, were higher than the 1.26 recorded for ordinary Portland cement (OPC). In addition, weight gain was 20.5% and volume expansion was 28.5% lower in the new materials compared to OPC. The products resulting from the external sulfate-cement interaction, gypsum and ettringite, were deposited primarily in the pores present in the pastes. The conclusion drawn is that binders bearing 10% or 20% BA are, a priori, apt for use in the design and construction of cement-based elements exposed to sulfate-laden environments. |
| first_indexed | 2024-03-10T14:01:17Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:01:17Z |
| publishDate | 2020-12-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-aae992e2b79646f0ab633d650d3676b12023-11-21T01:06:20ZengMDPI AGApplied Sciences2076-34172020-12-011024898210.3390/app10248982Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power PlantsJosé M. Medina0María Isabel Sánchez de Rojas1Isabel F. Sáez del Bosque2Moisés Frías3César Medina4Departamento de Construcción, Escuela Politécnica de Cáceres—Grado de Ingeniería Civil, Universidad de Extremadura, Instituto de Investigación de Desarrollo Territorial Sostenible (INTERRA), 10003 Cáceres, SpainDepartamento de Cementos y Reciclado de Materiales, Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), 28033 Madrid, SpainDepartamento de Construcción, Escuela Politécnica de Cáceres—Grado de Ingeniería Civil, Universidad de Extremadura, Instituto de Investigación de Desarrollo Territorial Sostenible (INTERRA), 10003 Cáceres, SpainDepartamento de Cementos y Reciclado de Materiales, Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), 28033 Madrid, SpainSostenibilidad en Materiales de Construcción, Universidad de Extremadura, Unidad Asociada al CSIC, Departamento de Construcción, Instituto de Investigación de Desarrollo Territorial Sostenible (INTERRA), Escuela Politécnica de Cáceres—Grado de Ingeniería Civil, Universidad de Extremadura, 10003 Cáceres, SpainTo address some of the gaps in the present understanding of the behavior of new supplementary cementitious materials such as bottom ash (BA) from biomass-fired electric power plants in cement manufacture, this study explored the effect of this promising material on the sulfate resistance of the end product. Cement paste prepared with 10% or 20% (previously characterized for mineralogy and chemical composition) BA was Köch–Steinegger tested for sulfate resistance. The hydration products, in turn, were analyzed before and after soaking the reference and experimental cements in sodium sulfate to determine whether the use of the addition hastened microstructural, mineralogical, or morphological decay in the material. The 56 days findings showed that the presence of BA raised binder resistance to sulfate attack. Köch–Steinegger corrosion indices of 1.29 and 1.27 for blended cements OPC + 10 BA and OPC + 20 BA, respectively, were higher than the 1.26 recorded for ordinary Portland cement (OPC). In addition, weight gain was 20.5% and volume expansion was 28.5% lower in the new materials compared to OPC. The products resulting from the external sulfate-cement interaction, gypsum and ettringite, were deposited primarily in the pores present in the pastes. The conclusion drawn is that binders bearing 10% or 20% BA are, a priori, apt for use in the design and construction of cement-based elements exposed to sulfate-laden environments.https://www.mdpi.com/2076-3417/10/24/8982sulfatebiomass ashdurabilitysustainabilitybinary cements |
| spellingShingle | José M. Medina María Isabel Sánchez de Rojas Isabel F. Sáez del Bosque Moisés Frías César Medina Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants Applied Sciences sulfate biomass ash durability sustainability binary cements |
| title | Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants |
| title_full | Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants |
| title_fullStr | Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants |
| title_full_unstemmed | Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants |
| title_short | Sulfate Resistance in Cements Bearing Bottom Ash from Biomass-Fired Electric Power Plants |
| title_sort | sulfate resistance in cements bearing bottom ash from biomass fired electric power plants |
| topic | sulfate biomass ash durability sustainability binary cements |
| url | https://www.mdpi.com/2076-3417/10/24/8982 |
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