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Showing 1 to 13 of 13 for “"Asphalt shingles"”.
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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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Environmental analysis of using recycled asphalt shingles in pavement applications.
Recycled asphalt shingles have been used in paving applications for more than two decades and have growing acceptance in the industry. The cost of asphalt binder has steadily increased, fueling pressure to find suitable recycled materials to supplement virgin materials. The Minnesota Department of …
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Influence of Recycled Asphalt Shingles on Asphalt Binder Content, Mixture Stiffness, and Laboratory Rutting Performance
<p>Recycled asphalt shingles (RAS) is a technology in which pavement costs can be reduced significantly and pavement properties may be enhanced. Also, incorporating shingles into pavements reduces the impacts of waste shingles in landfills, preserving our environment. However, for this new …
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Quantitative evaluation of low-temperature performance of sustainable asphalt mixtures and binders containing recycled asphalt shingles (RAS) and rejuvenators
The utilization of recycled asphalt shingles (RAS) in HMA pavement applications was investigated via Disk-shaped Compact Tension (DC(T)) mixture testing and an acoustic emission (AE) based technique for estimating the embrittlement temperature of RAS-modified mixtures and asphalt binders prepared …
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Investigation of cracking resistance of recycled Superpave mixtures
… economical and environmentally friendly recycled asphalt materials has become increasingly popular for asphalt pavement construction. Although reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) are typically used in hot-mix asphalt, increasing the amount of RAP and RAS materials …
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Cracking potential of short- and long-term aged binder with various levels of ABR
It is widely accepted that using reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) could improve the sustainability of asphalt concrete (AC), in terms of cost savings and environmental factors. This should be only valid when short- and long-term pavement performance are not …
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Investigating Climate Impacts of Urbanization and the Potential for Cool Roofs to Mitigate the Kansas City Metropolitan Area’s Urban Heat Island Effect
… compared to conventional materials (e.g. dark asphalt shingles). In this study, we utilize the Weather Research and Forecasting (WRF) model to investigate the UHI under different scenarios during the same heat wave event (i.e. July 2012) in the Kansas City metropolitan area (KCMA). First a …
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Performance analysis of asphalt mixtures modified with ground tire rubber and recycled materials
… research has been done on rubber-modified asphalt due to its distinct performance benefits, resulting in advancements in the existing rubber modifier technologies. This study focuses on two such new rubber-modifier technologies- an Engineered Crumb Rubber (ECR), and a terminal-blend Rubber …
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Determining the Mobility of Metals Through Coal Combustion Byproducts in Surface Impoundments by Analyzing Leachate From Modified Saturated Hydraulic Conductivity Tests
… concrete aggregate, Portland cement substitute, asphalt shingles, etc. would require separating the CCBs into their components (fly ash, bottom ash, boiler slag, and flue gas desulfurization (FGD) material). It is recommended that an economic feasibility study be conducted on the ash pond(s) at …
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Evaluation of viscous effects in crack tip fields in recycled asphalt pavement materials using digital image correlation
… work, we investigated the fracture behavior of asphalt, a heterogeneous mixture of hard aggregates (usually rock) with a polymeric binder (also called asphalt), used in paving applications. Specifically we studied the dependence of asphalt fracture response on loading rate, temperature, and …
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An analysis of impact factors on the Illinois flexibility index test
The use of recycled materials in asphalt pavements has become widespread in recent years. Materials such as recycled asphalt pavement (RAP) and recycled asphalt shingles (RAS) have been incorporated into the material design of typical pavements. The use of these materials is both economically and …
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Effect of specimen geometry and test configuration on the fracture process zone for asphalt materials
… 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. However, recycled materials such as reclaimed …
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Investigating and Understanding the Effects of Reclaimed Asphalt Pavement and Shingles on the Rheology and Performance Grading of Asphalt Cement.
The incorporation of Recycled Asphalt Pavements (RAP) and Shingles (RAS) into neat asphalt binder is a useful development towards environmental sustainability apart from its economic savings benefits, which comes as a relief to the finances of the transportation sector. Recycling of pavements …