A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structural Behavior of Beams Produced with Geopolymer Concrete and Recycled Aggregate ; Comportamento estrutural de vigas construídas com betão geopolimérico e agregados reciclados
Tese de Doutoramento em Engenharia Civil apresentada à Faculdade de Ciências e Tecnologia ; The construction industry plays a significant role in depleting natural resources, highlighting the pressing need for environmental stewardship.To ensure sustainable growth, it is of paramount importance that the sector implements measures to minimize its ecological footprint. Some of the key approaches that can be selected include adopting sustainable materials and fostering the reuse of waste materials.The structural elements that can be found in this work were designed to incorporate both of the mentioned strategies as, on one hand, they were produced with the help of alkali-activated binders (AAB) - a more sustainable alternative to the traditional ordinary Portland cement (OPC) binders - and, on the other hand, due to the fact that aggregates recycled from construction and demolition waste (CDW) partly replaced natural aggregates in the production of the mentioned structural elements. The present dissertation describes, in detail, the research steps taken towards obtaining an eco-efficient AAB concrete formulation, qualified for being used in the production of structural elements. In the first part of this work, the research efforts were focused on the optimization of the formulation of geopolymeric mortars based on fly ash (FA) supported on the results provided by compressive strength tests performed to cubic specimens of reduced dimensions. In this optimization stage, the influence of parameters such as the curing temperature of the samples, proportion of the activating solution (especially sodium silicate) in the mixture, secondary precursors additions, interaction between the amount of sodium silicate and milled glass wastes and rate of utilization of aggregates sourced from recycled CDW to the compressive strength of the mentioned mortars. The study of FA-based AAB mortars concluded with the determination of the elasticity modulus of concrete compositions based on the previously optimized mortars ...
Structural Behavior of Beams Produced with Geopolymer Concrete and Recycled Aggregate ; Comportamento estrutural de vigas construídas com betão geopolimérico e agregados reciclados
Tese de Doutoramento em Engenharia Civil apresentada à Faculdade de Ciências e Tecnologia ; The construction industry plays a significant role in depleting natural resources, highlighting the pressing need for environmental stewardship.To ensure sustainable growth, it is of paramount importance that the sector implements measures to minimize its ecological footprint. Some of the key approaches that can be selected include adopting sustainable materials and fostering the reuse of waste materials.The structural elements that can be found in this work were designed to incorporate both of the mentioned strategies as, on one hand, they were produced with the help of alkali-activated binders (AAB) - a more sustainable alternative to the traditional ordinary Portland cement (OPC) binders - and, on the other hand, due to the fact that aggregates recycled from construction and demolition waste (CDW) partly replaced natural aggregates in the production of the mentioned structural elements. The present dissertation describes, in detail, the research steps taken towards obtaining an eco-efficient AAB concrete formulation, qualified for being used in the production of structural elements. In the first part of this work, the research efforts were focused on the optimization of the formulation of geopolymeric mortars based on fly ash (FA) supported on the results provided by compressive strength tests performed to cubic specimens of reduced dimensions. In this optimization stage, the influence of parameters such as the curing temperature of the samples, proportion of the activating solution (especially sodium silicate) in the mixture, secondary precursors additions, interaction between the amount of sodium silicate and milled glass wastes and rate of utilization of aggregates sourced from recycled CDW to the compressive strength of the mentioned mortars. The study of FA-based AAB mortars concluded with the determination of the elasticity modulus of concrete compositions based on the previously optimized mortars ...
Structural Behavior of Beams Produced with Geopolymer Concrete and Recycled Aggregate ; Comportamento estrutural de vigas construídas com betão geopolimérico e agregados reciclados
2024-10-11
101543638
Theses
Electronic Resource
English
El concreto con agregados reciclados como proyecto de sostenibilidad urbana
| DOAJ | 2015