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2007

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Articles 301 - 330 of 340

Full-Text Articles in Civil Engineering

Asphalt Paver Engineering Control Systems, Purdue Ect Team Jan 2007

Asphalt Paver Engineering Control Systems, Purdue Ect Team

ECT Fact Sheets Archive

At present, there are approximately 300,000 asphalt paving workers who are routinely exposed to asphalt fume. Presently, limited data exists concerning the level of exposure and subsequent health effects for paving workers. The engineering control method developed for highway class pavers includes ventilation systems, baffles, and enclosures to capture the generated contaminant within the paver's auger area and to exhaust it before it enters the workers' working environment.

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Paslode - Cordless Finish Nailer, Purdue Ect Team Jan 2007

Paslode - Cordless Finish Nailer, Purdue Ect Team

ECT Fact Sheets Archive

The short length (11.75"), better balance and textured super-grip handles of cordless nailer allow a user to be able to work comfortably in cramped overhead and other hard-to-reach places. The Paslode Impulse IM250 II features patented linear combustion engine that is powered by Impulse fuel cells and rechargeable batteries.

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Movax Robotic: Hydraulic Vibratory Pile Driver, Purdue Ect Team Jan 2007

Movax Robotic: Hydraulic Vibratory Pile Driver, Purdue Ect Team

ECT Fact Sheets Archive

Pile sheeting operations need auxiliary equipment and personnel to complete, while contractors have been concerned in increasing safety for crews, saving money, and efficiency. Movax is a robotic excavator mounted hydraulic vibratory pile driver. Its unique robotic articulation and side gripping ability allows the operator not only to drive and extract sheet piles, but also to pick a sheet, move it, thread it, and place it. The Movax can pick up a 50-foot sheet without releasing the sheet during these operations. This ability allows the Movax Robotic to help increasing crew safety by reducing the need of personnel in the …

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Safe Excavation, Purdue Ect Team Jan 2007

Safe Excavation, Purdue Ect Team

ECT Fact Sheets Archive

Excavating with a backhoe or similar equipment has the potential risk of hitting an underground utility which could cause serious injuries and expensive damages. An electronic device that provides a real-time warning of the utility lines immediately ahead of the digging tool and provides an easily interpreted, real-time computer readout of the depth, location, and size buried metallic objects. Developed by Dr. Leonhard E. Bernold, it consists of an active metal detector search coil; a signal processing (control) unit; and a PC computer equipped with an analog-to-digital converter interface.

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Soft Trencher, Purdue Ect Team Jan 2007

Soft Trencher, Purdue Ect Team

ECT Fact Sheets Archive

Excavation near existing electrical lines, gas lines and other underground utilities can be dangerous and time consuming. A self propelled trencher called the Soft Trencher developed by Battelle Memorial Institute, Columbus, Ohio uses supersonic air to loosen dirt which is then vacuumed up into a truck or piled into a windrow for later removal of backfill. The supersonic air used to break up the soil is harmless to underground utilities and cables. Unlike traditional excavation methods there is no downward force that can be exerted on the underground utilities.

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Soundless Chemical Demolition Agents, Purdue Ect Team Jan 2007

Soundless Chemical Demolition Agents, Purdue Ect Team

ECT Fact Sheets Archive

The traditional approach to demolishing concrete structures or reducing the size of large rocks or boulders has typically included the use of explosives. The resulting explosions are associated with the obvious risks posed by shock waves and fly rock. Soundless chemical demolition agents (SCDAs) have proven to be viable substitutes for the use of explosives. SCDAs are powdery materials that will expand considerably when mixed with water.

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Lumimark - Safety Traffic Marking System, Purdue Ect Team Jan 2007

Lumimark - Safety Traffic Marking System, Purdue Ect Team

ECT Fact Sheets Archive

Masters Builders, Inc. developed Lumimark HW 100 White and Yellow, polymer-modified, cementitious safety traffic marking products. It's designed for use in edge and center line striping on concrete pavement for both mainline and secondary roads, and all striping needs on runways, taxiways and aprons at airports. This technology helped the department avoid a costly bridge replacement project by rehabilitating a steel truss bridge using lightweight composites.

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Dynamic Construction Visualizer, Purdue Ect Team Jan 2007

Dynamic Construction Visualizer, Purdue Ect Team

ECT Fact Sheets Archive

The Dynamic Construction Visualizer (DCV) is general-purpose 3D visualization system that allows simulation model developers to animate modeled operations with chronological and spatial accuracy in 3D virtual space. The system is independent of any particular simulation-modeling program or CAD modeling software.

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Modular Frp Composite Bridge Deck, Purdue Ect Team Jan 2007

Modular Frp Composite Bridge Deck, Purdue Ect Team

ECT Fact Sheets Archive

The bridge infrastructure of the United States is in constant need of repair and rehabilitation. It is reported that 43% of the bridges in the USA have been identified as being structurally deficient or functionally obsolete due to corrosion. SuperdeckTM, a non-corrosive fiber reinforced polymer (FRP) composite bridge deck. The Deck is designed and engineered into a lightweight, strong and rigid structure that will not corrode. The deck sections, composed of hexagon and double-trapezoid profiles, are bonded with a high-strength adhesive under controlled conditions in the manufacturing plant.

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Superpave System, Purdue Ect Team Jan 2007

Superpave System, Purdue Ect Team

ECT Fact Sheets Archive

The Superpave is the acronym for 'SUperior PERforming Asphalt PAVEments' system. It was developed by Strategic Highway Research Program (SHRP) to give highway engineers and contractors the tools they need to design asphalt pavements that will perform better under extremes of temperature and heavy traffic loads.

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Recycled Plastic Composite Railroad Crossties, Purdue Ect Team Jan 2007

Recycled Plastic Composite Railroad Crossties, Purdue Ect Team

ECT Fact Sheets Archive

The U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL) led a team that developed, demonstrated, and patented innovative recycled plastic composite material for use as railroad crossties to replace chemically-treated wood ties. Replacement of turnout ties is a major cost item because of the size and complexity of these components. Since the mid-1990s CERL has conducted research on composite RR ties made of recycled post-consumer waste plastics. Because these plastic composite ties are inherently resistant to moisture damage, rot, and insect attack, they require no chemical treatments as do wood ties.

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Smart Concrete, Purdue Ect Team Jan 2007

Smart Concrete, Purdue Ect Team

ECT Fact Sheets Archive

Concrete has been widely used for many years as a composite material for various types of structures. One of the weakness of concrete is that it cannot withstand tension which can cause cracks easily. There has been a huge demand to monitor concrete structures cracking and preventing them from propagating further. Smart concrete was developed Dr. Deborah D.L. Chung from State University of New York at Buffalo. Smart concrete is reinforced by carbon fiber as much as 0.2% to 0.5% of volume to increase its sense ability to strain or stress while still has good mechanical properties.

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Digital Hardhat System, Purdue Ect Team Jan 2007

Digital Hardhat System, Purdue Ect Team

ECT Fact Sheets Archive

The Digital Hardhat (DHH) is a pen-based personal computer (PC) running a Windows operating system, which is used to collect multimedia information such as text, sound, video, and images. This pen-based computer can also be used to communicate between the construction site and other locations using various connection methods including a wireless network connection, which enables a personnel to roam around the site and video teleconference live with others to solve problems collaboratively.

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Bridge Lock-Up Device System, Purdue Ect Team Jan 2007

Bridge Lock-Up Device System, Purdue Ect Team

ECT Fact Sheets Archive

The Colebrand Lock-up Device (LUD) provides additional substructure strength to resist seismic forces as a structural shock transmission unit for highway bridges. This system can provide a temporary rigid link between bridge structural members under seismic, braking, or other fast-acting type loads, while permitting slow thermal movements.

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Primecontract.Com, Purdue Ect Team Jan 2007

Primecontract.Com, Purdue Ect Team

ECT Fact Sheets Archive

The PrimeContract.com network is based on a three-tier software architecture using JAVA in a UNIX environment. The network is designed to effortlessly accommodate large numbers of users in an extremely secure environment.

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Prosidyc: Simulation Program For Construction Operations, Purdue Ect Team Jan 2007

Prosidyc: Simulation Program For Construction Operations, Purdue Ect Team

ECT Fact Sheets Archive

PROSIDYC is a system for simulating construction operations jointly developed by the Planning and Methods Unit of Dragados y Construcciones, Madrid, Spain and the Division of Construction Engineering & Management at Purdue University. PROject SImulation Dragados Y Construcciones (PROSIDYC) is a computer based system for analyzing construction job site production processes. It is used to improve productivity in the field by studying resource utilization and cycle times and identifying opportunities for production improvement. PROSIDYC uses the CYCLic Operations NEtwork (CYCLONE) modeling format originally developed by Daniel W. Halpin

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An Industrial Gas Turbine/Compressor Package Designed For Rapid Installation And Commissioning, Purdue Ect Team Jan 2007

An Industrial Gas Turbine/Compressor Package Designed For Rapid Installation And Commissioning, Purdue Ect Team

ECT Fact Sheets Archive

A reduction in both the time and the cost of installation of medium-to-large industrial gas turbine mechanical drive packages can be achieved. Integration of the gas turbine driver, driven equipment, and ancillaries on two easily-assembled skids is made possible by the application of several technological developments, including aeroderivative gas turbine engines, dry gas compressor seals, compact plate-type heat exchangers, variable-speed AC motor drives, and microprocessor-based control systems which are certified for hazardous environments. By minimizing the need for interconnection of piping and wiring between multiple equipment and controls locations, site installation and commissioning time is drastically reduced. This can result …

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Stroboscope, Purdue Ect Team Jan 2007

Stroboscope, Purdue Ect Team

ECT Fact Sheets Archive

STROBOSCOPE is an acronym for STate and Resource Based Simulation of COnstructionProcEsses. It is a general-purpose simulation programming language that has been designed for the simulation of very complex construction processes that involve many different types of resources. STROBOSCOPE models are based on a network of interconnected modeling elements and on a series of programming statements that give the elements unique behavior and control the simulation.

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Site Characterization And Analysis Penetrometer System (Scaps) : Assessing Site Cotamination, Purdue Ect Team Jan 2007

Site Characterization And Analysis Penetrometer System (Scaps) : Assessing Site Cotamination, Purdue Ect Team

ECT Fact Sheets Archive

While a number of techniques exist for the remediation of contaminated soils, one of the largest problems is often the initial site assessment. It can be a difficult, expensive and time-consuming process to determine the exact extent of site contamination. The U.S. Army Engineer Waterways Experiment Station (WES) under the sponsorship of the U.S. Army Environmental Center (AEC) initiated the development of the Site Characterization and Analysis Penetrometer System (SCAPS) Research, Development, and Technology Demonstration Program to provide the Department of Defense (DoD) with a rapid and cost-effective means to characterize soil conditions at DoD sites undergoing installation restoration (cleanup).

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3d Laser Scanning & Modeling System, Purdue Ect Team Jan 2007

3d Laser Scanning & Modeling System, Purdue Ect Team

ECT Fact Sheets Archive

Traditional methods of measuring and modeling the surface geometry of large, complex structures or sites that require engineering or survey-grade accuracy are often inaccurate, incomplete or expensive. Inaccurate or incomplete drawings and models often lead to costly construction errors or delays. A portable, auto-scanning laser and PC system that lets users economically obtain accurate, complete, and timely as-built geometry information for large structures and sites. The system can remotely measure natural surfaces up to 100m away at the speed of 800 points per second. With spacing between adjacent points as fine as 1mm, users can capture an extremely high level …

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Real Time Positioning, Purdue Ect Team Jan 2007

Real Time Positioning, Purdue Ect Team

ECT Fact Sheets Archive

Construction operations involve location and positioning elements in the field. There are two primary components to the system; transmitters and receivers. The system allows multiple users to work at the same time once the system is set up. These users can include surveyors, craft people, and equipment operators each of whom is working concurrently and using the positioning system to capture accurate real-time position information about the work environment.

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Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team Jan 2007

Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team

ECT Fact Sheets Archive

Removal of contaminated soil underneath existing structures causes settlement. There is a need for a remediation technology that eliminates this problem. The jet grouting by the triple rod system can be combined with an on site remediation technology (e.g., soil washing). Jet grouting was developed primarily for underpinning and/or excavation support. The benefits of this technology lie in the future reduction of structural settlement, and site access flexibility.

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Mechanically Stabilized Earth Wall Abutments For Bridge Support, Ioannis Zevgolis, Philippe L. Bourdeau Jan 2007

Mechanically Stabilized Earth Wall Abutments For Bridge Support, Ioannis Zevgolis, Philippe L. Bourdeau

JTRP Technical Reports

The research is an investigation on the possible use of MSE bridge abutments as direct support of bridges on Indiana highways. First, analysis was performed following conventional design methods, in order to assess the performance of MSE bridge abutments with respect to ultimate limit states, i.e. external and internal stability. In the second part of the study, finite element analysis was performed, in order to assess the performance of the structures with respect to serviceability limit states, i.e. immediate and consolidation settlements. In both parts, analysis was performed on case examples that reflect relatively typical situations. The main findings confirm …

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Effective And Robust Coordination Of Traffic Signals On Arterial Streets, Volume 1, Research Report, Wei Li, Andrew P. Tarko Jan 2007

Effective And Robust Coordination Of Traffic Signals On Arterial Streets, Volume 1, Research Report, Wei Li, Andrew P. Tarko

JTRP Technical Reports

Many transportation agencies use Synchro and SimTraffic software package to optimize signal coordination. In general, this software package effectively reduces the efforts of traffic systems engineers and improves the quality of the designed coordination. Nevertheless, the initial solutions given by the software packages usually require adjustment, at both the design and implementation stages. The major objective of this research, therefore, is to reduce the time and effort needed in solution tuning and thus to improve the effectiveness and the efficiency of using Synchro/SimTraffic in arterial signal coordination design. The research outcome is expected to help traffic systems engineers reach reasonable …

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Recasting Dilemma Zone Design As A Marginal Cost-Benefit Problem, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta Jan 2007

Recasting Dilemma Zone Design As A Marginal Cost-Benefit Problem, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta

Department of Civil and Environmental Engineering: Faculty Publications

One control objective at high-speed isolated intersections is to provide safe phase transition by minimizing the occurrence of high-speed vehicles in the dilemma zone before the phase is terminated. An upper limit for extending the green (maximum green time) is used to avoid an indefinite extension of the main-street green. Currently, the maximum green times are chosen by using engineering judgment. This approach does not explicitly consider the trade-offs between safety and delay and hence often results in both unsafe and inefficient performance at the intersection under medium to heavy traffic volumes. The dilemma problem is recast as one of …

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Limitations Of Simultaneous Gap-Out Logic, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta Jan 2007

Limitations Of Simultaneous Gap-Out Logic, Anuj Sharma, Darcy M. Bullock, Srinivas Peeta

Department of Civil and Environmental Engineering: Faculty Publications

The current practice of specifying simultaneous gap-out logic places constraints on signal controller logic. These constraints cannot be achieved under high traffic flow conditions, and degraded signal efficiency and dilemma zone protection often result. This study documents the phenomenon described above with set-back detectors at an instrumented intersection in Noblesville, Indiana, and characterizes the problem of dilemma zone protection as being traffic-volume dependent, a factor that should be carefully considered before the simultaneous gap-out logic is applied. Implementation of simultaneous gap-out logic led to max out ranging from 3.5% to 40% of cycles per hour during peak traffic flow periods …

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Event-Based Data Collection For Generating Actuated Controller Performance Measures, Edward J. Smaglik, Anuj Sharma, Darcy M. Bullock, James R. Sturdevant, Gary Duncan Jan 2007

Event-Based Data Collection For Generating Actuated Controller Performance Measures, Edward J. Smaglik, Anuj Sharma, Darcy M. Bullock, James R. Sturdevant, Gary Duncan

Department of Civil and Environmental Engineering: Faculty Publications

Cycle-by-cycle data have been shown to be effective in the analysis of a signalized intersection with measures of effectiveness such as volume-to-capacity ratios, arrival type, and average vehicular delay. Currently, actuated traffic controllers are unable to store vehicle counts and vehicle occupancy in cycle-by-cycle bins, requiring extra equipment and personnel to collect data in these bins. The objective of this research was to develop an integrated general purpose data collection module that time stamps detector and phase state changes within a National Electrical Manufacturers Association actuated traffic signal controller and uses those data to provide quantitative graphs to assess arterial …

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Bs News Jan 2007

Bs News

Building Services Engineering

No abstract provided.

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A Prescriptive Analysis Of The Indiana Coal Transportation Infrastructure, Thomas F. Brady, Chad M. Pfitzer Jan 2007

A Prescriptive Analysis Of The Indiana Coal Transportation Infrastructure, Thomas F. Brady, Chad M. Pfitzer

JTRP Technical Reports

This report presents the findings of a scoping study of Indiana’s coal transportation infrastructure. Throughout the literature search and investigative phases of this project, it was clear that there exists growing awareness of the importance that transportation plays in the domestic coal industry. There is evidence that suggests transportation costs may be higher than the cost of mining coal. Numerous studies suggest that coal transportation can be developed and utilized for significant competitive economic advantage. The Powder River Basin area in Wyoming is a stellar example of how the combination of a large natural resource and careful transportation planning can …

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A Study Of Effective Soil Compaction Control Of Granular Soils, Vincent P. Drnevich, Aaron C. Evans, Adam Buser Prochaska Jan 2007

A Study Of Effective Soil Compaction Control Of Granular Soils, Vincent P. Drnevich, Aaron C. Evans, Adam Buser Prochaska

JTRP Technical Reports

Although it is known that impact compaction tests are not appropriate for granular soils, these tests continue to be widely used. Excessive settlements frequently occur in granular soils where specified field compaction is based on Standard Proctor (ASTM D 698; AASHTO T 99) maximum dry unit weights. A laboratory test program evaluated alternative test methods for granular soil compaction control and showed that a Vibrating Hammer method (similar to British Standard BS 1377:1975, Test 14) has great promise for laboratory compaction of these soils. A One-Point Vibrating Hammer test on an oven-dry soil sample is able to provide the maximum …

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