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handle: 10261/211916
[ES]: La durabilidad de los materiales de base cemento representa una de las principales problemáticas en el parque de infraestructuras existentes en la actualidad, siendo en muchas ocasiones el motivo de costosas actuaciones de reparación y mantenimiento. En aras de mejorar este comportamiento a lo largo de la vida de servicio de aquellas estructuras expuestas a ambientes agresivos (marino, hielo-deshielo, sulfatos, etc.) se ha extendido la utilización de adiciones en el diseño de cementos binarios o in-situ en la fabricación de hormigones. Este hecho, junto con el actual contexto socio - económico que trata de reemplazar el actual modelo de economía lineal por un modelo basado en la economía circular, ha provocado que la comunidad científico - técnica trate de buscar materias primas alternativas a las utilizadas tradicionalmente, obteniendo siempre productos finales con un nivel prestacional óptimo. Este trabajo de investigación realiza un estudio comparativo del efecto que tiene la incorporación de un 10% en peso de residuos procedentes de la industria extractiva y de la obtención de energía eléctrica en las prestaciones durables de los nuevos cementos eco-eficientes. Para ello, se fabricaron probetas prismáticas de 1x1x6 cm de pasta, que posteriormente fueron curadas y expuestas en un medio rico en sulfatos. Una vez finalizado el periodo de exposición fueron sometidos a una caracterización mecánica y a un estudio microestructural identificando principalmente los productos resultantes de esta exposición.
[EN]: The durability of cement-based materials is one of the most pressing issues in today’s infrastructure park, given the high cost of repair and maintenance where it is compromised. The use of additions has consequently become widespread in the design of binary cements or cast-in-place concrete as a way of enhancing durability throughout the service life of structures exposed to aggressive (marine, freeze-thaw or sulfate) environments. That, in conjunction with today’s socio-economic demands to replace the current linear with a circular economic model has encouraged the scientific-technical community to seek alternative raw materials in pursuit of high performance end products. This study compared the effect of including 10 wt% of mining and electric power generation industry waste on the durability of new eco-efficient cements. Cured, 1x1x6 cm prismatic paste specimens were exposed to a sulfate-high environment. After exposure they were characterised for strength and their microstructure was analysed to identify the respective reaction products. The main conclusion drawn is that the inclusion of this waste induces no loss of durability in cement-based materials exposed to sulfate-rich environments.
Resumen del trabajo presentado al 7th Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Managament (REHABEND), celebrado en Cáceres (España) del 15 al 18 de mayo de 2018.
Peer reviewed
Performance, Cementos, Cement, Additions, Durability, Valorisation
Performance, Cementos, Cement, Additions, Durability, Valorisation
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