Análisis de las propiedades físicas de agregados gruesos de hormigón demolido, recuperados con dos procesos de jigs de agua
Construction and demolition waste (CDW) represents one of the largest sources of waste in Europe, with over 800 million tons generated annually. The European Union has implemented various policies to improve the management of this waste, promoting the recycling and reuse of materials, such as recycl...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | español |
| OAI Identifier: | oai:upcommons.upc.edu:2117/416828 |
| Acceso en línea: | https://hdl.handle.net/2117/416828 |
| Access Level: | acceso abierto |
| Palabra clave: | Building materials -- Environmental aspect Materials de construcció -- Aspectes ambientals Àrees temàtiques de la UPC::Edificació::Materials de construcció |
| Sumario: | Construction and demolition waste (CDW) represents one of the largest sources of waste in Europe, with over 800 million tons generated annually. The European Union has implemented various policies to improve the management of this waste, promoting the recycling and reuse of materials, such as recycled aggregates, in new construction projects. These initiatives aim to reduce environmental impact and foster a circular economy in the construction sector. Additionally, the construction sector generates the highest flow of waste in the European Union, reinforcing the need to implement efficient and sustainable recycling methods to decrease the demand for natural resources. In this context, the present study evaluated the feasibility of recovering coarse concrete aggregates through a two-stage jiggs concentration process. For the experiment, conventional concrete (C16/20) was prepared in the laboratory, crushed in a jaw mill, and then sieved to obtain material fractions between 5 and 20 mm, which were considered as coarse aggregates. The concentration process was conducted in a jigging system with water, facilitating the separation of particles with different densities. The tests performed included measurements of specific density and apparent density in both dry and wet states. The shape factor, water absorption, and the content of condensed cement paste in the particles were also evaluated. The specific density was measured using the water immersion method, while the apparent density was determined by filling a cylinder with dry aggregates and then weighing it. Water absorption was assessed by submerging the aggregates in water for 24 hours and measuring the weight difference between the dry and saturated aggregates. The shape factor of the aggregates was determined by measuring 200 samples. The results demonstrate the effectiveness of the two-stage jiggs method for recovering coarse aggregates with properties similar to natural aggregates. The recovered aggregates could potentially be used as partial substitutes in concrete production, contributing to greater sustainability in construction and reducing the demand for natural. |
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