Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance
This work aims to contribute to reducing environmental damage caused by the manufacturing of Portland cements (PC), through in-depth exploration into the durability of two mortars manufactured from blast furnace slag: an alkaline-activated one (AAS) and a hybrid cement (HS) with less than 20% clinke...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-09-01
|
| Series: | Boletín de la Sociedad Española de Cerámica y Vidrio |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0366317522000450 |
| _version_ | 1797653963435147264 |
|---|---|
| author | Segundo Shagñay Asunción Bautista Francisco Velasco Manuel Torres-Carrasco |
| author_facet | Segundo Shagñay Asunción Bautista Francisco Velasco Manuel Torres-Carrasco |
| author_sort | Segundo Shagñay |
| collection | DOAJ |
| description | This work aims to contribute to reducing environmental damage caused by the manufacturing of Portland cements (PC), through in-depth exploration into the durability of two mortars manufactured from blast furnace slag: an alkaline-activated one (AAS) and a hybrid cement (HS) with less than 20% clinker. The carbonation resistance of these eco-friendly mortars is compared to that of a mortar based on Portland IV cement. From a mineralogical point of view, DTA-TG and confocal Raman microscopy (CRM) tests have been carried out, along with measurement of pH changes, compression strength and total porosity. Böhme tests have been performed to evaluate changes due to carbonation in the wear behavior of the mortars under study. Using the CRM technique, it has been possible to establish a relationship between the carbonation of the systems with the unbound carbon content, as well as identify the different polymorphic phases of CaCO3 formed. The results obtained reveal that alternative AAS and HS mortars are more difficult to carbonate than Portland cement mortars, and that the effect of this process on the porosity depends on the nature of the hydroxides previously present in the pore solution. The carbonation of the surfaces also improves the abrasive wear resistance of the mortars under study. Resumen: Este trabajo pretende contribuir a la reducción de los daños medioambientales causados por la fabricación de cementos Portland (CP), mediante la profundización en la durabilidad de dos morteros fabricados a partir de escorias de alto horno: uno activado alcalinamente (AAS) y uno híbrido (HS) con menos del 20% de clínker. La resistencia a la carbonatación de estos morteros ecológicos se compara con la de un mortero a base de cemento Portland tipo IV. Desde el punto de vista mineralógico, se han realizado ensayos de DTA-TG y de microscopía confocal Raman (CRM), junto con la medición de los cambios de pH, la resistencia a la compresión y la porosidad total. Se han realizado ensayos Böhme para evaluar los cambios debidos a la carbonatación en el comportamiento a desgaste de los morteros estudiados. Mediante la técnica CRM se ha podido establecer una relación entre la carbonatación de los sistemas con el contenido de carbono no ligado, así como identificar las diferentes fases polimórficas de CaCO3 formadas. Los resultados obtenidos revelan que los morteros alternativos (AAS y HS) son más difíciles de carbonatar que el mortero de cemento Portland, y que el efecto de este proceso sobre la porosidad depende de la naturaleza de los hidróxidos previamente presentes en la solución de los poros. La carbonatación de las superficies también mejora la resistencia al desgaste abrasivo de los morteros estudiados. |
| first_indexed | 2024-03-11T16:52:28Z |
| format | Article |
| id | doaj.art-81a763f1c2784520ba3245601be30d77 |
| institution | Directory Open Access Journal |
| issn | 0366-3175 |
| language | English |
| last_indexed | 2024-03-11T16:52:28Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Boletín de la Sociedad Española de Cerámica y Vidrio |
| spelling | doaj.art-81a763f1c2784520ba3245601be30d772023-10-21T04:21:56ZengElsevierBoletín de la Sociedad Española de Cerámica y Vidrio0366-31752023-09-01625428442Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performanceSegundo Shagñay0Asunción Bautista1Francisco Velasco2Manuel Torres-Carrasco3Corresponding author.; Materials Science and Engineering Department, IAAB, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, SpainMaterials Science and Engineering Department, IAAB, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, SpainMaterials Science and Engineering Department, IAAB, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, SpainMaterials Science and Engineering Department, IAAB, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, SpainThis work aims to contribute to reducing environmental damage caused by the manufacturing of Portland cements (PC), through in-depth exploration into the durability of two mortars manufactured from blast furnace slag: an alkaline-activated one (AAS) and a hybrid cement (HS) with less than 20% clinker. The carbonation resistance of these eco-friendly mortars is compared to that of a mortar based on Portland IV cement. From a mineralogical point of view, DTA-TG and confocal Raman microscopy (CRM) tests have been carried out, along with measurement of pH changes, compression strength and total porosity. Böhme tests have been performed to evaluate changes due to carbonation in the wear behavior of the mortars under study. Using the CRM technique, it has been possible to establish a relationship between the carbonation of the systems with the unbound carbon content, as well as identify the different polymorphic phases of CaCO3 formed. The results obtained reveal that alternative AAS and HS mortars are more difficult to carbonate than Portland cement mortars, and that the effect of this process on the porosity depends on the nature of the hydroxides previously present in the pore solution. The carbonation of the surfaces also improves the abrasive wear resistance of the mortars under study. Resumen: Este trabajo pretende contribuir a la reducción de los daños medioambientales causados por la fabricación de cementos Portland (CP), mediante la profundización en la durabilidad de dos morteros fabricados a partir de escorias de alto horno: uno activado alcalinamente (AAS) y uno híbrido (HS) con menos del 20% de clínker. La resistencia a la carbonatación de estos morteros ecológicos se compara con la de un mortero a base de cemento Portland tipo IV. Desde el punto de vista mineralógico, se han realizado ensayos de DTA-TG y de microscopía confocal Raman (CRM), junto con la medición de los cambios de pH, la resistencia a la compresión y la porosidad total. Se han realizado ensayos Böhme para evaluar los cambios debidos a la carbonatación en el comportamiento a desgaste de los morteros estudiados. Mediante la técnica CRM se ha podido establecer una relación entre la carbonatación de los sistemas con el contenido de carbono no ligado, así como identificar las diferentes fases polimórficas de CaCO3 formadas. Los resultados obtenidos revelan que los morteros alternativos (AAS y HS) son más difíciles de carbonatar que el mortero de cemento Portland, y que el efecto de este proceso sobre la porosidad depende de la naturaleza de los hidróxidos previamente presentes en la solución de los poros. La carbonatación de las superficies también mejora la resistencia al desgaste abrasivo de los morteros estudiados.http://www.sciencedirect.com/science/article/pii/S0366317522000450Cementos híbridosEnsayo de carbonataciónDesgaste abrasivoDurabilidadMicroscopia Raman confocal |
| spellingShingle | Segundo Shagñay Asunción Bautista Francisco Velasco Manuel Torres-Carrasco Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance Boletín de la Sociedad Española de Cerámica y Vidrio Cementos híbridos Ensayo de carbonatación Desgaste abrasivo Durabilidad Microscopia Raman confocal |
| title | Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance |
| title_full | Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance |
| title_fullStr | Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance |
| title_full_unstemmed | Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance |
| title_short | Carbonation of alkali-activated and hybrid mortars manufactured from slag: Confocal Raman microscopy study and impact on wear performance |
| title_sort | carbonation of alkali activated and hybrid mortars manufactured from slag confocal raman microscopy study and impact on wear performance |
| topic | Cementos híbridos Ensayo de carbonatación Desgaste abrasivo Durabilidad Microscopia Raman confocal |
| url | http://www.sciencedirect.com/science/article/pii/S0366317522000450 |
| work_keys_str_mv | AT segundoshagnay carbonationofalkaliactivatedandhybridmortarsmanufacturedfromslagconfocalramanmicroscopystudyandimpactonwearperformance AT asuncionbautista carbonationofalkaliactivatedandhybridmortarsmanufacturedfromslagconfocalramanmicroscopystudyandimpactonwearperformance AT franciscovelasco carbonationofalkaliactivatedandhybridmortarsmanufacturedfromslagconfocalramanmicroscopystudyandimpactonwearperformance AT manueltorrescarrasco carbonationofalkaliactivatedandhybridmortarsmanufacturedfromslagconfocalramanmicroscopystudyandimpactonwearperformance |