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 20 of 30 for “"modified asphalt"”.
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Performance Characteristics of Polyethylene Terephthalate (PET) Modified Asphalt
… Therefore, the use of ground PET particles in asphalt may provide an environmentally friendly solution for the disposal of large quantities of PET waste. This study evaluated the performance of PET as an asphalt modifier with both asphalt binder and asphalt mixture testing. The binder testing …
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Characterization of Polymer Modified Asphalt Binders Containing Processed Oil
… investigates the impact of processed oil on asphalt binder PG 64-22 and conjugate of it with common modifiers such as Crumbed Rubber Modifier (CRM), Styrene-Isoprene-Styrene (SIS), Styrene-Butadiene-Styrene (SBS) and Petroleum Resin (PE). The binder was tested at different temperatures, and …
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Performance of hot mix asphalt using peat modified asphalt binder
… among others, are introduced to be mixed with asphalt. This study was conducted to investigate the use of parit Nipah peat (PNpt) to be mixed with asphalt, both of unaged and aged conditions to improve the performance of asphalt mix. The physical properties, storage stability and rheological …
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Rheological and nanomechanical characterization of aging in polymer modified asphalt
… in rheological and nanomechanical properties of asphalt due to aging is determined in the laboratory. Asphalt binders are aged using Rolling Thin Film Oven (RTFO), Pressure Aging Vessel (PAV), and draft ovens. Asphalt binder includes an unmodified base binder, Styrene-Butadiene (SB) and …
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Characterization of aged polymer modified asphalt cements for recycling purposes
Since polymer modified asphalt cement (PMAC) has been employed for a decade, the lifetime and wear on some of these pavements is reaching a stage where resurfacing is necessary. This research focuses on the characterization of aged polymer modified asphalt cements (PMAC) to evaluate their potential …
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Evaluation of Warm Mix Additives for Use in Modified Asphalt Mixtures: Phase I
… use of warm mix additives with typical polymer-modified and terminal blend tire rubber asphalt mixtures from Nevada and California. The research effort is broken into three phases that are intended to evaluate the impacts of warm mix additives with typical polymer-modified and terminal blend …
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The effects of micro and nano size bauxite particles in modified asphalt binders and asphaltic mixtures
… to focus how to improve the characteristics of asphalt mix in order to reduce the pavement deteriorations. This study aims to evaluate the effects of Malaysian Micro bauxite powders (MBP) and Nano bauxite powders (NBP) with 3%, 5% and 7% by mass of bitumen. Conventional bitumen 80/100 …
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Modeling of the linear viscoelastic response of polymer modified asphalt binders at intermediate and high temperatures
… the dynamic mechanical properties of polymer modified asphalt binders at intermediate and high service temperatures. A typical paving grade asphalt and seven different elastomeric modifiers were used. The modifiers, representing a wide variety of random copolymers and thermoplastic block …
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Effects of Storage on the Linear Viscoelastic Response of Polymer-Modified Asphalt at Intermediate to High Temperatures
… area of improved roadway performance is polymer-modified binder. The complex behavior of polymer-modified binders, particularly over time, is not yet well-understood by engineers. Therefore, an experimental study was performed to determine the effects of four years of storage at room temperatures …
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Asphalt binder and mixture performance using Batu Pahat soft clay as modifier
… the use of BPSC particles as additive in Hot Mix Asphalt (HMA) mixture which was previously introduced in powder form. The experimental work for this survey included the use of four BPSC ratios (2, 4, 6 and 8%) according to the weight of bitumen. A design for the hot mix asphalt was executed by …
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Three-Dimensional Finite Element Analysis to Evaluate Reflective Cracking Potential in Asphalt Concrete Overlays
… plus traffic loading. On the other hand, the modified asphalt (PG 64-28) greatly reduces the tensile stresses at the top of the overlay compared to regular asphalt (PG 58-22) at the end of the cooling cycle before traffic loading. It appears that a ductile crack control system (such as ISAC) …
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Optimization and characterization of asphalts modified with isocyanate modifier
… the paving industry relies on the use of polymer modified asphalts. With the progress of polymer science and technology, new polymer modified asphalt technologies have emerged. Among the most innovative modification technologies belong the use of B2last, a commercial product of BASF. Unlike other …
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Performance analysis of asphalt mixtures modified with ground tire rubber and recycled materials
Extensive 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 …
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An acoustic emission-based test to evaluate low temperature behavior of asphalt materials
Low temperature cracking in asphalt pavements located in cold climates is a major cause of pavement deterioration. Accurate evaluation of low temperature cracking behavior of asphalt materials is necessary in order to design pavements that are resistant to thermally induced cracking. Detrimental …
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Prediction of Linear Viscoelastic Response of the Loss Shear Modulus of Polymer-Modified Binders
… mathematical models, developed on straight asphalt binders, are inadequate to characterize the frequency dependence of response of polymer-modified asphalt binders. In an earlier study at Virginia Tech, mathematical models were developed to predict the storage and loss shear moduli of …
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INVESTIGATING THE INTERACTION BETWEEN THE RECYCLED COMPONENTS AND THE ASPHALT BINDERS, PLANT, LAB, AND FIELD MIXES
<p>"Modifying asphalt binders and mixes with recycled components is common practice due to their environmental and economic merits. Literature has indicated that different recycled components interact with (blend with) asphalt differently, ranging from no blending, partial blending, or full …
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Performance of advera® warm mix asphalt with reclaimed asphalt pavement materials
… global attention and implementation of warm mix asphalt (WMA) technology in the asphalt industries. The constant efforts by asphalt industry to reduce emissions by lowering asphalt production temperature, made possible by incorporating warm asphalt additive named Advera®. Reclaimed asphalt …
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