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.
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Showing 1 to 17 of 17 for “"Virgin materials"”.
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Environmental analysis of using recycled asphalt shingles in pavement applications.
… fueling pressure to find suitable recycled materials to supplement virgin materials. The Minnesota Department of Transportation has dedicated several studies for using asphalt shingle scrap in asphalt pavements. There are two types of shingles that can be used in pavement: manufacturer waste …
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Development of a life-cycle assessment tool for flexible pavement in-place recycling techniques and conventional methods
The worldwide interest in using recycled materials in flexible pavements as an alternative to virgin materials has increased significantly over the past few decades. Therefore, recycling has been utilized in the pavement maintenance and rehabilitation activities. Three types of in-place recycling …
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Develop a Laboratory Mixing Procedure For Hot Mix Asphalt Containing RAP Materials
… become more prevalent with the rising costs of virgin materials and the recent push to develop more environmentally friendly and sustainable roadways. The use of RAP decreases the costs of constructing new pavements by limiting the amount of virgin materials required. For this reason there is a …
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Direct Lithium-ion Battery Recycling to Yield Battery Grade Cathode Materials
… (NCM) are one of the most essential cathode materials for EV applications due to their long cycle life, high capacity, and low cost. In 2008, 18.9% of Lithium-ion batteries used NCM cathode material worldwide while this number increased to 31% six years later. An environment–friendly and …
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Re Fuse: Place, material, nature
… damage humankind has caused in the search of virgin materials (Mining) and burying of used materials (Landfill). Essentially the project is about an analysis of a site and its context and through this analysis identifying a position and a response in the potential utilization of architecture …
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Nothing Unwanted: Prototyping Matter out of Place
… building industry relies on abundant virgin materials, machinery, and a global transportation network. Immersed in this culture of convenience, architecture has limited agency to engage responsibly and intimately with reclaimed materials. The design of waste, inevitably, often …
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Sustainable Material Solution for Flexible Pavements; Performance Evaluation and Impact Assessment of Utilizing Multiple Recycled Materials in HMA
… for pollution-free and recyclable engineering materials has been increased as the cost of energy and environmental concerns have risen. Green material design can lead to better environmental quality and sustainability of civil infrastructure. Road construction is one of the largest consumers of …
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Modelling Non-Catalytic Gas-Solid Reactions
… a gas and a solid, and (iii) the sulphation of virgin and sintered CaO by SO2, the only product being solid. Studies of calcination showed that, at least for limestones subjected to a history of cycling between the calcined and carbonated states, a correctly-determined f(X) could be applied to …
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Impact of reclaimed asphalt pavements on pavement sustainability
… as those of asphalt mixtures prepared with virgin materials, setting a great precedent for any future study conducted on high RAP content. The effect of RAP content as well as the effect of binder-grade bumping on the laboratory performance of asphalt mixtures was evaluated. Results showed …
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Sustainable 3D Concrete Printing for Eco-conscious Construction: Recycled Aggregates and Low-carbon Binders
… to rely 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, …
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Effects of Laser Shock Peening on Residual Stress, Texture and Deformation Microstructure of Ti-6Al-4V Alloy
… have been done on variety laser shock peened materials. However, getting better view of how LSP brings about changes in the microstructure and establish quantitative relations between LSP parameters and residual strain/stress distributions, microstructure and texture evolution is still …
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Effect of specimen geometry and test configuration on the fracture process zone for asphalt materials
… States and elsewhere in the world, recycled materials are commonly incorporated into asphalt mixtures, to provide environmental and economic benefits by decreasing the use of virgin materials, such as natural or quarried aggregates and asphalt binder, in newly designed asphalt mixtures. …
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Optimizing the Use of Reclaimed Asphalt Pavement (RAP) in Hot Mix Asphalt Surface Mixes
… it has been proven as a valid substitute for virgin materials. Instead, the use of RAP in surface mixes is more limited, with a major concern being that the high RAP mixes may not perform as well as traditional mixes. To reduce risks of compromised performance, the use of RAP has commonly been …
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The Improvement of Interfacial Bonding, Weathering and Recycling of Wood Fibre Reinforced Polypropylene Composites
… recycled 8 times). Although TS was lower for virgin composites with 50 wt% fibre than for those with 40 wt% fibre, this initially increased with recycling by up to 14% (after being recycled 2 times), which was considered to be due to improved fibre dispersion, but then decreased with further …
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Laboratory characterization and field performance of hot in-place recycled mixtures
… the new application by adding small amounts of virgin materials (emulsion or virgin binder). The HIR treatments are commonly categorized into three types including surface recycling, repaving and remixing. The decision for choosing between different types of HIR treatments is made based on the …
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Impact of recycled asphalt shingles on asphalt concrete characteristics
The use of recycled materials in asphalt mixtures such as reclaimed asphalt pavements (RAP) and more recently recycled asphalt shingles (RAS) have become widely accepted in the United States as a replacement for virgin asphalt binder or virgin aggregates. However, the economics and the challenges …
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The effect of pre-strain on the fracture toughness of line pipe steel
… different material properties to those of the ‘virgin’ material. Plastic deformation causes work hardening; the yield strength is increased, but the strain hardening capacity and the ductility of the material are reduced. The published literature on the effects of pre-strain indicates that it …