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Low Temperature Performance Of Bio-Derived/Chemical Additives In Warm Mix Asphalt, Joseph H. Podolsky, Jesse Studer, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Low Temperature Performance Of Bio-Derived/Chemical Additives In Warm Mix Asphalt, Joseph H. Podolsky, Jesse Studer, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

Corn and soy based bio-derived warm mix asphalt (WMA) additives are currently being developed. In the past, additives with similar properties have been shown to successfully reduce the mixing and compaction temperatures of asphalt by as much as 30°C. Isosorbide distillation bottoms (IDB), a WMA additive, is a co-product from the conversion of sorbitol to isosorbide, where sorbitol is derived by hydrogenating glucose from corn biomass. Past research utilizing IDB at several dosage rates showed there was improvement in low temperature binder performance using the bending beam rheometer (BBR) between dosage rates of 0.5% and 1.0% by ...


Investigation Of Performance Tests Using Bio-Derived/Chemical Additives, Joseph H. Podolsky, Ashley Buss, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Investigation Of Performance Tests Using Bio-Derived/Chemical Additives, Joseph H. Podolsky, Ashley Buss, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

An industry wide emphasis on sustainable asphalt practices has given rise to increasing use of warm mix asphalt technologies. WMA reduces both binder viscosity and mixing and compaction temperatures by 20-55°C during the asphalt mix production and laydown process. This research investigates several bio-derived WMA additives that act as chemical modifiers with surfactant properties. Two established additives derived from the forest products industry are studied as well as a WMA additive in development that is derived from corn. The WMA material responses are measured for binder testing and mixture testing. All binder testing with the additives was conducted using ...


Use Of Bioadvantaged Materials For Use In Bituminous Modification, Conglin Chen, Joseph H. Podolsky, Nacú B. Hernández, Austin Hohmann, R. Christopher Williams, Eric W. Cochran 2018 Iowa State University

Use Of Bioadvantaged Materials For Use In Bituminous Modification, Conglin Chen, Joseph H. Podolsky, Nacú B. Hernández, Austin Hohmann, R. Christopher Williams, Eric W. Cochran

Eric W. Cochran

Historically, the use of “green” materials around the world has been limited due to their higher production costs when compared to petrochemical derived materials. However, due to the recent volatility and increasing price of petroleum derivatives, there is a growing demand for the use of environmentally friendly materials. One of the most commonly used materials for bitumen modification are poly(styrene-block-butadiene-block-styrene) (SBS) type polymers. Recently, Iowa State University Chemical Engineering Department was able to synthetize thermoplastic elastomers using acrylated epoxidized soybean oil (AESO), a bioadvantaged replacement of butadiene, and styrene with the use of controlled radical polymerization techniques. Initial rheological ...


Purdue’S Biowall, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Purdue’S Biowall, Purdue Ect Team

ECT Fact Sheets

Mechanical ventilation, energy recovery ventilation, and infiltration (air that leaks into a building) are commonly used to introduce fresh air. These are all valid approaches, but a living plant-based filter is an innovative complement to these traditional technologies. A Biowall has the potential to improve indoor air quality while reducing the quantity of air needed for ventilation, creating the potential for energy savings. Figure 1 shows a Biowall prototype being evaluated in the ReNEWW House, a research home located near the Purdue University campus (http://www.renewwhouse.com/).


Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue ECT Team 2018 Construction Engineering & Management, Purdue University

Mdp (Machine Drive Power) Intelligent Compaction Technology, Purdue Ect Team

ECT Fact Sheets

Caterpillar developed MDP (Machine Drive Power) technology to fill this gap. Rather than an accelerometer and vibratory drum, it uses the principle of rolling resistance to provide indications of soil stiffness. This allows it to perform more reliably on cohesive and granular soils with less variability than accelerometer systems. It also means that the technology can be used on both vibratory and static drum compactors, which are often used on larger sites. While the technology is quite useful on its own, it is even better as a complementary technology to the existing accelerometer-based systems. Contractors who use vibratory soil compactors ...


Re-Entrained Road Dust Pm10 Emission From Selected Streets Of Krakow And Its Impact On Air Quality, Marek Bogacki, Marian Mazur, Robert Oleniacz, Mateusz Rzeszutek, Adriana Szulecka 2018 AGH University o Science and Technology

Re-Entrained Road Dust Pm10 Emission From Selected Streets Of Krakow And Its Impact On Air Quality, Marek Bogacki, Marian Mazur, Robert Oleniacz, Mateusz Rzeszutek, Adriana Szulecka

Robert Oleniacz

Scientific research studies conducted in various parts of the world confirm that PM10 concentrations in urban air depend to a great extent on the resuspension processes of the dust deposited on the road surface. The paper presents the results of the study related to the determination of the re-entrained PM10 emissions from four selected streets of Krakow (Southern Poland) together with the assessment of its impact on air quality. Examined streets are characterised by different traffic intensity (from 500 to over 20 000 vehicles per day) and individual vehicle structure. Dust material sampling and estimation of the PM10 emission were ...


Evaluation Of Compatibility Of Neutron-Shielding Boron Aggregates With Portland Cement In Mortar, Michal A. Glinicki, Aneta Antolik, Marek Gawlicki 2018 Institute of Fundamental Technological Research

Evaluation Of Compatibility Of Neutron-Shielding Boron Aggregates With Portland Cement In Mortar, Michal A. Glinicki, Aneta Antolik, Marek Gawlicki

Michal A. Glinicki

No abstract provided.


Addressing Clay Mineralogy Effects On Performance Of Chemically Stabilized Expansive Soils Subjected To Seasonal Wetting And Drying, Bhaskar C.S. Chittoori, Anand J. Puppala, Aravind Pedarla 2018 Boise State University

Addressing Clay Mineralogy Effects On Performance Of Chemically Stabilized Expansive Soils Subjected To Seasonal Wetting And Drying, Bhaskar C.S. Chittoori, Anand J. Puppala, Aravind Pedarla

Bhaskar C. S. Chittoori

Premature failures in chemically stabilized expansive soils cause millions of dollars in maintenance and repair costs. One of the reasons for these failures is the inability of existing stabilization design guidelines to consider the complex interactions between clay minerals and the stabilizers. It is vital to understand these complex interactions, as they are responsible for the strength improvement and swell/shrink reduction in these soils, in turn affecting the overall health of the infrastructure. Hence, this research study examined the longevity of chemically stabilized expansive soils subjected to wetting/drying conditions with a major focus on clay mineralogy. Eight different ...


Exploring High-Resolution Data Obtained From Asc/3 Controller Of Intersection Se Division St & Se 122nd Ave, Portland, Oregon., Naowar Al-Abbas 2018 Portland State University

Exploring High-Resolution Data Obtained From Asc/3 Controller Of Intersection Se Division St & Se 122nd Ave, Portland, Oregon., Naowar Al-Abbas

Civil and Environmental Engineering Master's Project Reports

High-resolution data obtained from ASC/3 controllers can be used to create a variety of performance measures, helping engineers and professionals in monitoring intersection performance, identifying issues, and making proper improvements. These measures concern the intersection quality of the progression, capacity, and non-vehicular operations (e.g. pedestrian crossings). In this report, we explored high-resolution data obtained from the intersection of SE Division Street and 122nd Avenue. This intersection had some safety concerns as it is considered one of most dangerous intersections in Portland, Oregon. Thus, the first variable we examined from the data was pedestrian wait time when a cross ...


Basic Highway Workzone Safety, Collin Shamberger 2018 The University of Akron

Basic Highway Workzone Safety, Collin Shamberger

Honors Research Projects

The purpose of this essay will be to examine, and provide information detailing work zone safety practices, and maximizing safety in construction zones. This report will examine the functionality of components of a work zone and how they work together, the use of standard construction drawings of work zones, personal protective equipment of workers, possible hazards of work zones, minimizing risks and ultimately work zone safety training. Also this report will provide a spreadsheet which can be used to calculate and layout a construction work zone based on a GPS location.


Addressing Clay Mineralogy Effects On Performance Of Chemically Stabilized Expansive Soils Subjected To Seasonal Wetting And Drying, Bhaskar C.S. Chittoori, Anand J. Puppala, Aravind Pedarla 2018 Boise State University

Addressing Clay Mineralogy Effects On Performance Of Chemically Stabilized Expansive Soils Subjected To Seasonal Wetting And Drying, Bhaskar C.S. Chittoori, Anand J. Puppala, Aravind Pedarla

Civil Engineering Faculty Publications and Presentations

Premature failures in chemically stabilized expansive soils cause millions of dollars in maintenance and repair costs. One of the reasons for these failures is the inability of existing stabilization design guidelines to consider the complex interactions between clay minerals and the stabilizers. It is vital to understand these complex interactions, as they are responsible for the strength improvement and swell/shrink reduction in these soils, in turn affecting the overall health of the infrastructure. Hence, this research study examined the longevity of chemically stabilized expansive soils subjected to wetting/drying conditions with a major focus on clay mineralogy. Eight different ...


The Need For Enhanced Physical Infrastructure In The United States, Tanvi Gandham 2018 Claremont McKenna College

The Need For Enhanced Physical Infrastructure In The United States, Tanvi Gandham

CMC Senior Theses

An examination of necessary infrastructure improvements in the United States.


Effect Of Substrate Roughness, Slope, And Body Size On Climbing Behavior And Performance Of Juvenile American Eels (Anguilla Rostrata), Zahra Anwar 2018 University of Massachusetts Amherst

Effect Of Substrate Roughness, Slope, And Body Size On Climbing Behavior And Performance Of Juvenile American Eels (Anguilla Rostrata), Zahra Anwar

Environmental & Water Resources Engineering Masters Projects

The effect of ramp slope and substrate grain size on the passage of juvenile American Eel (Anguilla rostrata) over indoor ramps was tested from May – August 2016. Two size classes of fish (300 glass eels 50 – 70 mm and 300 elvers 90-114 mm), five substrates varying in coarseness (Substrate 1: 0.18-0.25 mm grain size, Substrate 2: 0.25-0.60 mm grain size,

Substrate 3; 0.60-1.00 mm grain size, Substrate 4: 1.00 – 2.00 mm grain size, Substrate 5: 2.00-

4.00 mm grain size), and three ramp slopes (25, 35 and 45 degrees) were ...


Lies, Damned Lies, Avs, Shared Mobility, And Urban Transit Futures, Graham Currie 2018 Monash University

Lies, Damned Lies, Avs, Shared Mobility, And Urban Transit Futures, Graham Currie

Journal of Public Transportation

It seems to me there is a gigantic lot of nonsense discussed about the future of transport and the future of public transport in particular. As a researcher in the field, I find my emotions boiling over. I get angry at blanket statements telling us public transport has no future and it seems to me much of what is talked about regarding transport futures flies in the face of facts and a long history of what knowledge has gleaned about the human condition, economics, cities, and travel. My hope is that readers will see prevailing discourse differently as a result ...


Just Around The Corner: The Future Of U.S. Public Transportation, Steven E. Polzin 2018 Urban Transportation Research, University of South Florida

Just Around The Corner: The Future Of U.S. Public Transportation, Steven E. Polzin

Journal of Public Transportation

No abstract provided.


Structural Cyber-Physical Systems: A Confluence Of Structural Health Monitoring And Control Technologies, Rosana E. Martínez-Castro, Shinae Jang 2018 University of Connecticut

Structural Cyber-Physical Systems: A Confluence Of Structural Health Monitoring And Control Technologies, Rosana E. Martínez-Castro, Shinae Jang

Articles

Many bridges in the nation’s transportation infrastructure network have been found to be structurally deficient. In face of a natural or man-made disaster, this poses a serious threat to the execution of emergency respondent logistics, as the failure of such structures could disconnect communities from the necessary provisions and services that must remain accessible after a disaster. To predict such an eventuality, dependable information on structural status for decision-making can be obtained from structural health monitoring (SHM) systems. However, the avoidance of such a situation is preferred. Structural control systems offer an option to improve structural response during extreme ...


Can Public Transportation Compete With Automated And Connected Cars?, Ralph Buehler 2018 Virginia Tech

Can Public Transportation Compete With Automated And Connected Cars?, Ralph Buehler

Journal of Public Transportation

Over the next 30 years, technological innovation will make automobile travel more convenient. Automated and connected vehicles will perform an increasing number of driving tasks without human input and will lure customers away from traditional public transportation. This paper first explores key characteristics of public transportation demand in the United States today--based on an international comparison with other Western countries. Next, the paper provides potential pathways on how public transportation agencies and local governments in the United States could respond to the emergence of automated and connected vehicles. The paper argues that space efficiency in urbanized areas and the rush ...


Future Of Rural Transit, Jill Hough, Ali Rahim Taleqani 2018 Upper Great Plains Transportation Institute, North Dakota State University

Future Of Rural Transit, Jill Hough, Ali Rahim Taleqani

Journal of Public Transportation

This paper provides a contemplative description of the future of rural public transportation. It considers emerging technologies along with their long-term implications and corresponding impacts on rural communities. The authors used their collective knowledge to identify key drivers of change in rural areas. As a result, the authors expect the future definition of rural areas to change and a new geographical classification to emerge. This classification is a continuum of population density gradient from highly populated urban areas to sparsely populated areas. The paper also suggests that automated vehicles and hologram telecommuting could dominate the U.S. transportation industry, even ...


Does The Future Of Mobility Depend On Public Transportation?, Kari Watkins 2018 Georgia Institute of Technology

Does The Future Of Mobility Depend On Public Transportation?, Kari Watkins

Journal of Public Transportation

We’ve all seen the headlines. “Will self-driving cars, taxis make mass transit obsolete?” (Davidson 2017) and “What happens if Uber or Lyft outcompetes public transit?” (Sen 2017) or even “Department Of Transportation Says The Future Of Transit Looks Pretty Bleak” (Griggs 2015). We are entering the next great revolution in how people move about in cities. But does the future of transportation mean the end of transit?


Ishs_Ab_2018.Docx, A Ballu, G. Pineau, D. Calluaud, L. David 2017 Selected Works

Ishs_Ab_2018.Docx, A Ballu, G. Pineau, D. Calluaud, L. David

L. David

To restore the ecological continuity of European rivers and streams and more specifically the free circulation of aquatic species, vertical slot fishways (VSF) are built to offer the possibility for fish to cross dams or weirs. Initially, such devices were constructed to allow the migration of fish species with an important swimming capacity like salmonids. Currently, more and more VSFs are equipped with macro-roughnesses fixed on their bed to help small or benthic species to cross obstructions. Macro-roughnesses are most often stones or concrete cylinders and have been introduced to decrease the velocity and the turbulent kinetic energy of the ...


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