Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"Recycled Aggregates"”.
-
Shrinkage & Modulus of Elasticity in Concrete with Recycled Aggregates
… research for concrete produced using recycled coarse aggregates (RCA). Five types of coarse aggregates were used in this study, four of which were RCA. The main purpose of this research was to examine how different types and properties of coarse aggregate affected compressive strength, …
-
Sustainable 3D Concrete Printing for Eco-conscious Construction: Recycled Aggregates and Low-carbon Binders
… heavily on ordinary Portland cement and virgin aggregates. This dissertation investigates strategies to reduce cement dependency, incorporate recycled aggregates, and improve the sustainability of 3DCP without compromising printability or constructability. A total of thirteen novel, potentially …
-
New building materials in structural engineering: “Structural concretes made with Coarse and Fine recycled aggregates”
… and demolition (C&D) operations to produce recycled aggregates. The great interest, both technical-economic and environmental aroused by this subject has in recent years and all over the world led to a noteworthy increase in experimental and theoretical studies on recycled materials …
-
Uso y fomento del árido reciclado en hormigón estructural como oportunidad de mejora medioambiental y económica: aplicación a la Comunidad Autónoma de La Rioja
… of view of construction and specifically the aggregates sector, focusing in La Rioja. To do this, we first analyze the characteristics that required the recycled aggregates, and regulations that apply them, and makes a comparison with the regulations that exists in other countries, mainly in …
-
Development of Sustainable Concretes for the Gulf Region
… the eCO2 of concrete and maximising the use of recycled materials are a necessity for the construction industry to comply with the ambitious sustainability goals of the country. <br/><br/>This thesis describes a 3 year research programme carried out to (i) evaluate the properties of locally …
-
The use of aggregate from demolition rubble in the making of ordinary and structural concretes
… is then used in fresh concrete - to be known as "recycled concrete". Various aspects of concrete technology are covered and in this way recycled concrete is compared to conventional concrete. The work was performed in three phases, and it should serve as a guide to prospective users. Phase 1: …
-
Performance of concrete made with commercially produced recycled coarse and fine aggregates in the Cape Peninsula
… of concrete made with laboratory-crushed recycled aggregate have been extensively investigated and reported by various researchers. However, only limited data are available on commercially produced recycled aggregates (RA). In this study, the properties of RA and the performance of …
-
Selecting material constituents and proportions for specific roller-compacted concrete mechanical properties
… to RCC compressive strength. Aggregate type (recycled aggregates, siliceous rounded sand and gravel, manufacture sand, and crushed aggregates) was also shown to affect aggregate packing density and RCC properties. Fly ash or ground granulated blast furnace slag replacement of cement …
-
The Effects of Aggregate Moisture Conditions in Rheological Behaviors of High-Workability Mortar Prepared with Fine Recycled-Concrete Aggregate
… to evaluate the workability of SCC mortar. Fine recycled-concrete aggregate (FRCA) was used in this study in mixtures to replace natural aggregate at different degrees. Fine aggregates, both natural and recycled aggregates, were used to prepared SCC mortar in two moisture conditions, wet …
-
Modeling recycled aggregate concrete crack by extended finite element method and concrete damage plasiticity
Crushing concrete to bring the aggregates back to be used for concrete structures is a process of creating recycled aggregate (RA). Recycled aggregate concrete (RAC) has become increasingly important in the field of construction. The use of recycled aggregate concrete made from recycled aggregate …
-
The Effect on the Durability Properties of Concrete of Partial Replacement of Natural Fine Aggregates with Recycled Concrete Fine Aggregates
… of alternative construction materials such as recycled aggregates into new construction as a measure to deal with this growing challenge. Currently, in South Africa, a blend of different types of sand is used for construction purposes due to variations in the sand quality and over exploitation …
-
Cohesive zone modeling of fracture of sustainable and functionally graded concrete
… properties of concrete, with both virgin and recycled aggregates, with relative accuracy and ease.
-
The use of construction and demolition waste in concrete in Cape Town
Incorporating recycled aggregates in concrete, despite the fact that effective technologies are available, is being adopted at a slow rate. These shortcomings have been associated with poor quality recycled aggregate (RA) products, lack of guidelines facilitating the use of RAs in various …
-
Development of the materials, construction, and maintenance phases of a life cycle assessment tool for pavements
… lift utilizes significant amounts of SCMs and recycled aggregates. The maintenance phase was found to be a significant contributor to the life cycle impacts, mainly because of the materials required for the activities, which accounted for 90% of the total energy and global warming potential, in …
-
Stiffness and deformation properties of asphalt open graded friction course containing cement coated natural aggregates
… physical properties of cement coated secondary aggregates, namely surface roughness and angle of internal friction and how these properties are related to the performance of Open Graded Friction Course asphalt mixtures, OGFC made from these materials under laboratory Uniaxial, deformation and …
-
Propiedades físicas y durabilidad de morteros aligerados con arcilla expandida y agregados con áridos reciclados
La investigación que recoge la presente Tesis Doctoral desarrolla un proceso experimental para obtener morteros ligeros fabricados con áridos reciclados finos, procedentes de escombros de hormigón y mixtos, y utilizarlos como materia prima para la fabricación de diferentes elementos constructivos. …
-
Processing and properties of recycled aggregate concrete
As interest in sustainable materials such as recycled aggregate concrete (RAC) rises, effort, it is important to understand the properties of RAC that relates to its use in construction. To respond to this need, various tests were performed to investigate the properties of RAC. Properties of RAC …
-
Engineering Properties, Hydration Kinetics, and Carbon Capture in Sustainable Construction Materials
… (treated ELT rubber) to partially replace fine aggregates of different construction and infrastructure materials including stabilized soft soil (0 %, 10 %, 30 %, and 50 % ELT rubber added by clay volume), portland cement concrete (0 %, 10 %, 20 %, and 30 % ELT rubber added by sand volume), and …
-
Interfacial transition zone composition and bonding in cementitious materials with asphalt-coated particles
… and durability properties of concrete with RAP aggregates, this research investigates the microstructural changes that RAP aggregates produce as well as the large-scale response testing of concrete slabs containing RAP. The main objectives were to examine the fundamental bonding and interaction …
-
Sustainable pavement applications utilizing quarry by-products and recycled/nontraditional aggregate materials
… from the production of required grades of aggregates and are often stockpiled in excess quantities at the quarries. More than 175 million US tons of QB are produced every year from the 3,000 operating quarries around the US. QB pose environmental and economic challenges as they accumulate …