Durabilidad de cementos activados alcalinamente: Resistenica al ataque ácido
[EN] Nowadays, the emissions of carbon dioxide (CO2) to the atmosphere from the production of Portland cement clinker are approximately 1.00 kg per kilogram of cement manufactured. Study the durability of alternative materials such as alkali activated cements, which significantly reduce these emissi...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | español |
| OAI Identifier: | oai:riunet.upv.es:10251/69264 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/69264 |
| Access Level: | acceso abierto |
| Palabra clave: | Alkali activation Activación alcalina Escoria granulada de alto horno Ceniza volante Residuos de catalizador de craqueo catalítico Blast furnace slag Fly ash Fluid catalytic cracking catalyst INGENIERIA DE LA CONSTRUCCION Máster Universitario en Ingeniería del Hormigón-Màster Universitari en Enginyeria del Formigó |
| Sumario: | [EN] Nowadays, the emissions of carbon dioxide (CO2) to the atmosphere from the production of Portland cement clinker are approximately 1.00 kg per kilogram of cement manufactured. Study the durability of alternative materials such as alkali activated cements, which significantly reduce these emissions was the purpose of this investigation. Alkali-activated cements are highly accepted in the scientific community because they have durability and mechanical characteristics comparable or even higher than those of Portland cement. The alkali activated cements studied in this research are wastes of: blast furnace slag, fly ash, catalytic cracking catalyst residues and gres tiles. In addition to the materials mentioned above, some Portland cement samples were also studied in order to compare their durability with the one of alkali activated cements. The experiments carried out to study the durability of these binders were: determining the acid neutralization capacity at different pH levels and the mass loss in test tubes, simulating aggressive environment to obtain short-term results. To carry out these trials it was necessary to prepare monolithic specimens of each material. The highest values of acid neutralization capacity we have them in those materials with higher calcium content, which also presented the highest mass loss per specimen. After completing the mass loss test on the specimens, these underwent optical microscopy, where we observed appearance of the surface of the specimens before and after the attack; and scanning electron microscopy, in order to study the components present in the samples. In most of the samples a migration of calcium compounds in the system can observed. |
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