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Showing 1 to 20 of 23 for “"recycled aggregate"”.
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Seismic characterization of recycled aggregate concrete
… of recycling waste concrete and reusing it as aggregate for structural concrete, but the use of Recycled Aggregate Concrete (RAC) is yet limited to non-structural applications such as road sub-base. Widespread application of RAC in areas such as seismic design requires an improved knowledge of …
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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 …
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Bond Performance between Corroded Steel and Recycled Aggregate Concrete Incorporating Nano Silica
… and bond performance of steel reinforced recycled aggregate concrete incorporating nano-silica under both normal and corrosive environmental conditions. The experimental part includes testing of 180 pull-out specimens prepared from 12 different mixtures. The main parameters studied were …
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Equivalent CO2 Emissions and Construction Costs of Buildings Designed Using Recycled Aggregate Concrete
… concerns and lack of a sustained source of aggregate resources, have resulted in increased research dedicated to concrete produced with a variety of recycled and secondary materials. Despite the environmental benefits of recycled concrete aggregate (RCA), compared with conventional …
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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 …
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Performance Enhancement of Concrete Produced with Treated Demolition Waste Aggregates
Recently, the utilisation of recycled aggregate from construction and demolition waste in civil engineering applications has proved to be an eco-friendly approach to overcome the current environmental concerns. Nevertheless, the poor quality of recycled aggregate and the high uncertainty of …
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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 …
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Low Cycle Fatigue Behavior of Concrete with Recycled Concrete Aggregates
<p>A comparison of concrete containing recycled concrete coarse aggregates and natural coarse aggregates subjected to high strain, low cycle compressive fatigue is presented. Using a strain based feedback control loop, concrete cylinders are compressed at 15µε/s to a specified strain then unloaded …
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Quality improvement of recycled concrete aggregate using polymers
… of crushed concrete performance by improving the aggregate properties when it is mixed with a polymer, so the properties will compare favorably with the natural aggregate properties especially at water observation and fragmentation resistance. The research includes using different polymer types …
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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 …
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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 …
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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 …
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Applications of Geopolymer in Civil Engineering: Feasibility Study of Loess Stabilization and Waste Concrete Recycling
… not environment friendly; (3) qualified natural aggregates for concrete production are being depleted; and (4) great amount of construction & demolition waste (C&D waste) is being produced every year. This means that green materials and recycling the C&D waste are of great significance to the …
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The use of aggregate from demolition rubble in the making of ordinary and structural concretes
… the concept of recycling demolished concrete as aggregate which 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, …
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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 …
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Investigation of Testing Methods to Determine Long-Term Durability of Wisconsin Aggregate Resources Including Natural Materials, Industrial By-Products, and Recycled/Reclaimed Materials
… (WisDOT) uses approximately 11,000,000 tons of aggregate per year for transportation projects. Being able to select durable aggregates for use in transportation projects is of considerable importance, if the aggregate deteriorates then the constructed facility requires premature repair, …
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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 …
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Advanced image analysis and techniques for degradation characterization of aggregates
Morphological or shape properties of virgin and recycled aggregate sources are known to affect pavement and railroad track mechanistic behavior and performance significantly in terms of strength, modulus and permanent deformation. Under repeated traffic loading aggregate particles used in …
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Cement Stabilization of Aggregate Base Materials Blended with Reclaimed Asphalt Pavement
… cement content on the strength and durability of recycled aggregate base materials. Specifically, the unconfined compressive strength (UCS) and final dielectric value in the Tube Suction Test (TST) were measured in a full-factorial experimental design including five RAP contents, five cement …
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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 …
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