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Articles 181 - 210 of 238
Full-Text Articles in Engineering
Soundprint: Continuous Acoustic Monitoring For Structure, Purdue Ect Team
Soundprint: Continuous Acoustic Monitoring For Structure, Purdue Ect Team
ECT Fact Sheets
The effective evaluation and management of corrosion in unbonded post-tensioned tendons requires an understanding of the causes of corrosion as well as an appreciation of the measures required to mitigate future corrosion. Present evaluation methods have been unsuccessful in accurately assessing the existing condition of post-tensioned structures. Continuous monitoring technology allows engineers to locate future failures so that property owners can implement cost-effective management strategies. An acoustic monitoring system, SoundPrint® has been developed which allows continuous monitoring of entire structures.
Electromagnetic Acoustic Transducers (Emat), Purdue Ect Team
Electromagnetic Acoustic Transducers (Emat), Purdue Ect Team
ECT Fact Sheets
The current accepted non-destructive evaluation methods used in the inspection of welds have several shortcomings regarding cost, false defect indications, and lack of sensitiveness to certain flaw orientations in welds.
Real-Time Construction Component Tracking System, Purdue Ect Team
Real-Time Construction Component Tracking System, Purdue Ect Team
ECT Fact Sheets
Accurate and timely identification and tracking of construction components are critical to operating a well-managed and cost efficient construction project. The prototype component tracking system developed for this technology integrates field sensors, portable computers, wireless communication, and real-time kinematic (RTK) global position (GPS) equipment.
Fiber Optic Sensor : Monitoring Precast Beams, Purdue Ect Team
Fiber Optic Sensor : Monitoring Precast Beams, Purdue Ect Team
ECT Fact Sheets
A new bridge over the Rio Puerco river, west of Albuquerque will be the first of its kind in the nation with built-in fiber-optic sensors to monitor stress in the bridge's girders. Known as "smart bridge" technology, the self-monitoring system offers many advantages over methods that rely largely on visual inspections.
Acoustic Wave Sensors, Purdue Ect Team
Acoustic Wave Sensors, Purdue Ect Team
ECT Fact Sheets
Modern office buildings are generally considered safe and healthful working environments. However, energy conservation measures have minimized the infiltration of outside air and contributed to the buildup of indoor air contaminants. Three products manufactured by Microsensor Systems Inc. are introduced: HAZMATCAD, CW Sentry Plus, MiniCAD MKII.
Real Time Positioning, Purdue Ect Team
Real Time Positioning, Purdue Ect Team
ECT Fact Sheets
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.
Infrared Gas Sensor, Purdue Ect Team
Infrared Gas Sensor, Purdue Ect Team
ECT Fact Sheets
In recent years, the rapid development of monitoring and detecting technology of indoor air quality have been observed. We have seen the two major streams of detection technology introduced so far: Acoustic wave sensor and Infrared gas sensor. The use of a gas monitoring system in the case of that dangerous levels of gases are detected, can help to prevent an explosion or can help to prevent worker injury or exposure to toxic gases.
Super Therm - Ceramic Paint Insulation, Purdue Ect Team
Super Therm - Ceramic Paint Insulation, Purdue Ect Team
ECT Fact Sheets
SUPER THERM is the result of years of research and development into Thermal Conductivity in cooperation with the Marshall Space Center, division of NASA. SUPER THERM is a combination of high-performance acrylic resins in water, which contain no cosolvents and will dry by evaporation.
Bone-Shaped Short Fiber Composite, Purdue Ect Team
Bone-Shaped Short Fiber Composite, Purdue Ect Team
ECT Fact Sheets
Civil engineers use steel, fiberglass and other similar materials to increase concrete's strength and toughness, but using those materials often requires costly construction techniques. Short-wire reinforced concrete should become a favorite technology since the process is compatible with standard construction processes and the steel used for the bone-shaped fibers is relatively cheap. Researchers at Department of Energy's Los Alamos National Laboratory have discovered that enlarging the ends of small fibers mixed into concrete substantially increases the material's overall strength and toughness.
Modular Frp Composite Bridge Deck, Purdue Ect Team
Modular Frp Composite Bridge Deck, Purdue Ect Team
ECT Fact Sheets
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.
Polymer Concrete Pipes, Purdue Ect Team
Polymer Concrete Pipes, Purdue Ect Team
ECT Fact Sheets
Materials are needed for piping applications that have high strength and are resistant to corrosive chemicals. Polymer concrete pipes are one solution to this problem. These pipes are made by mixing a high strength, thermosetting resin with oven-dried aggregate to form a type of concrete. The resin within the mix provides for bonding the aggregate much like Portland Cement does in traditional concrete pipes.
New Infrastructure Repair Method - Fiber Reinforced Plastics, Purdue Ect Team
New Infrastructure Repair Method - Fiber Reinforced Plastics, Purdue Ect Team
ECT Fact Sheets
As the United States infrastructure gets older, the need for repair and rehabilitation increases. Most of the constructed facilities are deteriorating at a rate faster than they can be repaired. Thermal setting resins and fiber rods and sheets are being used to repair and upgrade structural systems. High-strength FRP fabric can be wrapped with relative ease around a bridge pier, a concrete column, or a concrete beams. They are primarily used to stiffen columns and beams and to repair deteriorated concrete components.
Recycled Plastic Composite Railroad Crossties, Purdue Ect Team
Recycled Plastic Composite Railroad Crossties, Purdue Ect Team
ECT Fact Sheets
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.
Low Temperature Concrete Admixture, Purdue Ect Team
Low Temperature Concrete Admixture, Purdue Ect Team
ECT Fact Sheets
Performing construction processes under the cold weather condition requires construction engineers to plan operations considering low temperature condition. Concrete admixture mostly chemically interact with the constituents of concrete and affect the properties and characteristics of the fresh and hardened concrete and its durability. The purposes of the admixtures include water reduction, high strength, corrosion protection, crack control, finish enhancement, flowability, etc. One of the interesting and useful purposes is protection against freeze.
Segmental Precast Floating Draw Span, Purdue Ect Team
Segmental Precast Floating Draw Span, Purdue Ect Team
ECT Fact Sheets
The Admiral Clarey Bridge, includes a 100 ft long causeway, a 400 ft long fixed trestle and a 1035 ft long moveable section that includes the transition and floating drawspan. The fixed spans include a low level section as well as a high level section to allow a small boat channel. Floating structures, with a modular and repetitive configuration, provide the classic precasting opportunity for multiple reuses of the concrete formwork. This will reduce forming costs, produce nearly identical finished pieces, smooth surfaces, and easy fit-up and assembly.
Electrochemical Chloride Extraction, Purdue Ect Team
Electrochemical Chloride Extraction, Purdue Ect Team
ECT Fact Sheets
Conventional methods to deal with chloride-contaminated concrete require the removal of the contaminated concrete and replacement with uncontaminated concrete. These methods are noisy, dirty, time consuming, costly, and in some cases structurally detrimental. The Norcure system is a rehabilitation method developed to remove salt (chloride ions) from salt contaminated concrete structures without damaging the concrete. The removal of chloride ions stops the corrosion of embedded reinforcing steel and greatly extends the service life of salt contaminated structures.
Unpaved Road Stabilizer, Purdue Ect Team
Unpaved Road Stabilizer, Purdue Ect Team
ECT Fact Sheets
Many roads cannot be paved due to geological, environmental or economical reasons. However, unpaved roads may cause environmental concern from residents and users of the roadway. Natural Solutions Corporation's Roadbind products can reduce unpaved road maintenance costs by up to 95%, and help provide for a safer and healthier environment by eliminating hazardous fugitive dust and unsafe driving conditions.
Float-In Dam - "In The Wet" Construction Methods, Purdue Ect Team
Float-In Dam - "In The Wet" Construction Methods, Purdue Ect Team
ECT Fact Sheets
"In-the-Wet" construction methods use off-site prefabrication combined with lift-in or float-in of large precast segments onto pre-installed foundations. Ben C. Gerwick, Inc. is teamed with Bergmann Associates of Rochester, New York, and D'Appolonia of Pittsburgh, Pennsylvania, to design a replacement for Dam 2 on the Monongahela River for the US Army Corps of Engineers. This method offers several advantages over conventional "In-the-Dry" construction.
Soundless Chemical Demolition Agents, Purdue Ect Team
Soundless Chemical Demolition Agents, Purdue Ect Team
ECT Fact Sheets
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.
Lateral Statnamic Testing, Purdue Ect Team
Lateral Statnamic Testing, Purdue Ect Team
ECT Fact Sheets
STATNAMIC system was developed by adapting an axial test device. The device consists of three main parts: piston, cylinder/silencer, and reaction masses. STATNAMIC testing overcomes the practical difficulties of both static and dynamic load tests.
Plasma Arc Torch Technology Stabilization And Ground Improvement, Purdue Ect Team
Plasma Arc Torch Technology Stabilization And Ground Improvement, Purdue Ect Team
ECT Fact Sheets
This technology represents an additional alternative for stabilizing weak foundation soils upon which buildings, bridges, roads or other structures are to be constructed. A plasma is a gas that has been ionized by the electric arc of a plasma torch and can therefore respond to electrical and magnetic fields. Plasma arc technology can create plasma using almost any type of gas (oxygen, nitrogen, carbon monoxide, air, etc.) and in a wide range of pressures (vacuum to 20 atmospheres).
Mmfx Microcomposite Steel (Mmfx2), Purdue Ect Team
Mmfx Microcomposite Steel (Mmfx2), Purdue Ect Team
ECT Fact Sheets
One of the major problems facing the construction industry today is the effect of corrosion on steel, and the inherent structural weaknesses it causes in highways, bridges and buildings. MMFX 2 rebar was developed through the use of nanotechnology by Dr. Gareth Thomas, graduate school professor of materials science at Univ. of California, Berkeley. It is highly corrosion resistant and equal, or in many cases, far superior to existing conventional carbon steel in its properties of strength, energy absorption, toughness, brittleness, ductility, and formability.
Adjustable Steelwork Connectors, Purdue Ect Team
Adjustable Steelwork Connectors, Purdue Ect Team
ECT Fact Sheets
Since the outset of steel construction, there has been an increasing demand for connections that are faster and easier to assemble. Traditional weld and drill methods are a labor and time intensive part of steel erection and innovative solutions are vital. Lindapter® offers two steelwork connection systems that allow I beams to be bolted together without the need to drill or weld the steel members. Without drilling, the integrity of the steelwork remains intact. Without welding, the connection is quick, simple and adjustable where required.
Pipeman:Safety In Trenches, Purdue Ect Team
Pipeman:Safety In Trenches, Purdue Ect Team
ECT Fact Sheets
Even though heavy construction equipment such as a crane or backhoe excavator, is used to perform the task of pipe laying in the trench, workers are required to be inside the trench to guide the excavation, pipe laying, and final alignment. Work place safety has become a major concern in the construction industry over the past few decades, and trench cave-ins have caused serious and often fatal injuries to workers in the United States. The Construction Automation and Robotics Laboratory(CARL) at North Carolina State University has developed an alternative which involves advanced new technology: the prototype robotic excavation and pipe …
Armstrong I-Ceilings - Wireless Systems, Purdue Ect Team
Armstrong I-Ceilings - Wireless Systems, Purdue Ect Team
ECT Fact Sheets
It is sometimes inconvenient to use cell phones with laptop computers in many buildings, especially in a room with no windows or on the basement floors. Cell phone or wireless equipment coverage is limited in many buildings due to the lack of technical support to the wireless service. It has required installing many small antennas in a building. Armstrong's new i-ceilings Wireless Systems Antenna Panel is a standard Armstrong ceiling panel with the antenna already imbedded inside.
Starbandsm - Satellite Internet Service, Purdue Ect Team
Starbandsm - Satellite Internet Service, Purdue Ect Team
ECT Fact Sheets
The Internet has become one of the most important communication systems in the present. However people across the continental United States have not been able to get broadband Internet service. StarBand service, with no special phone lines or cable modems required is a feasible solution. StarBand is America’s first consumer two-way, always-on, high-speed satellite Internet service.
Placeware: Web Conferencing, Purdue Ect Team
Placeware: Web Conferencing, Purdue Ect Team
ECT Fact Sheets
Proper training of employees, partners and customers is critical to gaining a competitive edge in the marketplace. But most traditional training methods require an in-person meeting. PlaceWare Web conference is simply the combination of a phone call with live web-based visuals and interaction. Web conferencing enables presenter to communicate more effectively, decreasing the amount of time spent traveling and ultimately leading the audience to understanding.
Projectcenter, Purdue Ect Team
Projectcenter, Purdue Ect Team
ECT Fact Sheets
As a subscription based service, ProjectCenter provides an entire project team with point and click access to all relevant project information, without having to purchase additional software or learn complex systems. Shared information includes directory, specification, correspondence, sketches, meeting notes, shop drawing logs and field reports, RFIs, CCDs and CAD drawings.
Smart Pigs, Purdue Ect Team
Smart Pigs, Purdue Ect Team
ECT Fact Sheets
Smart Pigs are inspection vehicles that move inside a pipe line pushed along by the flowing material. Smart Pigs use different technologies to locate problems along the pipelines. Magnets have been used to detect corrosion where the most common technology is the Magnetic Flux Leakage (MFL) that detects corrosion on thinning walls. Another detection technology uses ultrasonic sensors to detect coating disbondment, cracks, dents and gouges. The Global Positioning System (GPS) technology is being adapted to smart pigs to obtain the exact location of any problem in the pipe or to map the pipe itself. Some of these new Smart …
Lokring Tube Connection, Purdue Ect Team
Lokring Tube Connection, Purdue Ect Team
ECT Fact Sheets
A fast and solderless system for connecting air-conditioning and refrigeration tubing of the same or different metals (aluminum, copper, steel) and between the same or different sizes. The system provides a hermetically sealed metal-to-metal connection that intrinsically safe. It can be used in areas where flammable or explosive conditions may exist.