Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste
Cement-based materials decay with exposure to aggressive agents, a development that raises infrastructure operation and maintenance costs substantially. This paper analyses the inclusion of ultrafine construction and demolition (U<sub>C&DW</sub>) and biomass-fuelled power plant (BA)...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/13/5977 |
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| author | Isabel Fuencisla Sáez del Bosque María Isabel Sánchez de Rojas Gabriel Medina Sara Barcala César Medina |
| author_facet | Isabel Fuencisla Sáez del Bosque María Isabel Sánchez de Rojas Gabriel Medina Sara Barcala César Medina |
| author_sort | Isabel Fuencisla Sáez del Bosque |
| collection | DOAJ |
| description | Cement-based materials decay with exposure to aggressive agents, a development that raises infrastructure operation and maintenance costs substantially. This paper analyses the inclusion of ultrafine construction and demolition (U<sub>C&DW</sub>) and biomass-fuelled power plant (BA) waste as pozzolanic additions to cement in pursuit of more sustainable and eco-respectful binders and assesses the durability of the end materials when exposed to seawater, chlorides (0.5 M NaCl) or sulphates (0.3 M Na<sub>2</sub>SO<sub>4</sub>). The effect of adding silica fume (SF) at a replacement ratio of 5% was also analysed. Durability was determined using the methodology proposed by Koch and Steinegger, whilst microstructural changes were monitored with mercury intrusion porosimetry (MIP), X-ray diffraction (XRD) and scanning electron microscopy (SEM) for a fuller understanding of decay processes. According to the findings, the new blended cements containing 20%U<sub>C&DW</sub> + 10%BA or 20%U<sub>C&DW</sub> + 20%BA + 5%SF resist the attack by the aggressive media studied, with a 56-d corrosion index of over 0.7. The composition of the reaction products generated with the attack is essentially the same in OPC and the SCM-bearing materials. The results show that the optimal replacement ratio for SCM is 30%. |
| first_indexed | 2024-03-10T10:01:10Z |
| format | Article |
| id | doaj.art-f4f00b021b4540ebb1ae1c64fcba4f0d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:01:10Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f4f00b021b4540ebb1ae1c64fcba4f0d2023-11-22T01:56:17ZengMDPI AGApplied Sciences2076-34172021-06-011113597710.3390/app11135977Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial WasteIsabel Fuencisla Sáez del Bosque0María Isabel Sánchez de Rojas1Gabriel Medina2Sara Barcala3César Medina4Department of Construction, School of Engineering, Institute for Sustainable Regional Development (INTERRA), University of Extremadura, 10003 Cáceres, SpainDepartamento de Cementos y Reciclado de Materiales, Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), c/Serrano Galvache, 28033 Madrid, SpainDepartamento Ingenierías Mecánica, Informática y Aeroespacial, Escuela de Ingenierías Industrial e Informática, Universidad de León, Campus de Vegazana, s/n, 24071 León, SpainSostenibilidad en Materiales de Construcción, Universidad de Extremadura, Unidad Asociada al CSIC, 10003 Cáceres, SpainDepartment of Construction, School of Engineering, Institute for Sustainable Regional Development (INTERRA), University of Extremadura, 10003 Cáceres, SpainCement-based materials decay with exposure to aggressive agents, a development that raises infrastructure operation and maintenance costs substantially. This paper analyses the inclusion of ultrafine construction and demolition (U<sub>C&DW</sub>) and biomass-fuelled power plant (BA) waste as pozzolanic additions to cement in pursuit of more sustainable and eco-respectful binders and assesses the durability of the end materials when exposed to seawater, chlorides (0.5 M NaCl) or sulphates (0.3 M Na<sub>2</sub>SO<sub>4</sub>). The effect of adding silica fume (SF) at a replacement ratio of 5% was also analysed. Durability was determined using the methodology proposed by Koch and Steinegger, whilst microstructural changes were monitored with mercury intrusion porosimetry (MIP), X-ray diffraction (XRD) and scanning electron microscopy (SEM) for a fuller understanding of decay processes. According to the findings, the new blended cements containing 20%U<sub>C&DW</sub> + 10%BA or 20%U<sub>C&DW</sub> + 20%BA + 5%SF resist the attack by the aggressive media studied, with a 56-d corrosion index of over 0.7. The composition of the reaction products generated with the attack is essentially the same in OPC and the SCM-bearing materials. The results show that the optimal replacement ratio for SCM is 30%.https://www.mdpi.com/2076-3417/11/13/5977biomass ashconstruction and demolition wastesupplementary cementitious materialscorrosion indexcement pastesdurability |
| spellingShingle | Isabel Fuencisla Sáez del Bosque María Isabel Sánchez de Rojas Gabriel Medina Sara Barcala César Medina Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste Applied Sciences biomass ash construction and demolition waste supplementary cementitious materials corrosion index cement pastes durability |
| title | Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste |
| title_full | Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste |
| title_fullStr | Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste |
| title_full_unstemmed | Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste |
| title_short | Durability of Ternary Cements Based on New Supplementary Cementitious Materials from Industrial Waste |
| title_sort | durability of ternary cements based on new supplementary cementitious materials from industrial waste |
| topic | biomass ash construction and demolition waste supplementary cementitious materials corrosion index cement pastes durability |
| url | https://www.mdpi.com/2076-3417/11/13/5977 |
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