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Articles 271 - 300 of 340
Full-Text Articles in Civil Engineering
Italgrip System, Purdue Ect Team
Italgrip System, Purdue Ect Team
ECT Fact Sheets Archive
The ever increasing number of registered vehicles has resulted in, up until the present time, a parallel increase in the number of road accidents. One of the reasons for this is that the quality of the road surface has not adequately kept pace with the increased volume of traffic. The Italgrip System increases skid resistance, reduces hydroplaning risk, reduces noise, and reduces salt consumption and can be applied to asphalt, concrete, or steel surfaces. It has been applied to several roadways in Europe, particularly road sections exhibiting problem areas.
Reactive Powder Concrete, Purdue Ect Team
Reactive Powder Concrete, Purdue Ect Team
ECT Fact Sheets Archive
RPC represents a new class of Portland cement-based material with compressive strengths in excess of 200 MPa range. By introducing fine steel fibers, RPC can achieve remarkable flexural strength up to 50 MPa. The material exhibits high ductility with typical values for energy absorption approaching those reserved for metals.
Segmental Precast Floating Draw Span, Purdue Ect Team
Segmental Precast Floating Draw Span, Purdue Ect Team
ECT Fact Sheets Archive
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.
3d-Mc Three Dimensional Machine Control, Purdue Ect Team
3d-Mc Three Dimensional Machine Control, Purdue Ect Team
ECT Fact Sheets Archive
Construction equipment using laser control technology cannot perform curves on a road construction project. The guiding of road construction equipment in curving contours requires references such as hubs, staking, or elevated string lines. The 3D MC system uses three modules to control the piece of equipment: a total station, receiver and control system device. The main benefit of the 3D MC system is the obvious gain of productivity generated by this innovation.
Shaking Table System For Geotechnical Centrifuge, Purdue Ect Team
Shaking Table System For Geotechnical Centrifuge, Purdue Ect Team
ECT Fact Sheets Archive
The shaking table system for geotechnical centrifuge, which can simulate sinusoidal and real seismic waves under a centrifugal force of 50 times earth gravity, is capable of providing significant data for the seismic design of structures. The shaking table can accommodate test specimens up to 250kg under 50G condition, so it can be used to perform various types of ground shaking tests.
High Performance Concrete (Hpc), Purdue Ect Team
High Performance Concrete (Hpc), Purdue Ect Team
ECT Fact Sheets Archive
Normal Strength Concrete (NSC) is heavy and lacks the required workability in some large concrete structures, such as high-rise buildings, bridges, and structures under severe exposure conditions. High Performance Concrete (HPC) is the latest development in concrete.
Ar2000 Super Recycler, Purdue Ect Team
Ar2000 Super Recycler, Purdue Ect Team
ECT Fact Sheets Archive
Hot in-place recycling (HIR) is a process for rehabilitating deteriorated asphalt pavements. HIR recycling enables repaving to be 25-30% cheaper than traditional asphalt resurfacing systems and minimizes the disruption of traffic. Martec's AR2000 Super Recycler is a self-propelled equipment train, consisting of two identical Preheaters, a Heater-Miller and a Heater-Mixer as the main units totaling 210 feet (64 m) in length, with a conventional paver, a rubber-tired roller and a vibratory roller added to handle laydown and compaction. This train recycles asphalt pavement in five separate stages: preheating, hot milling, heat and stir, pugmill mixing, and laydown and compaction.
Stay-In-Place (Sip) Formwork, Purdue Ect Team
Stay-In-Place (Sip) Formwork, Purdue Ect Team
ECT Fact Sheets Archive
With the recent development of composite materials, SIP system are offering architects and engineers numerous advantages over competitive systems such as maximum flexibility, cost saving, and efficient time control in the various construction field; residential, commercial, industrial building and bridge as well. SIP systems have been applied to various type of project providing various panels composed of synthetic materials such as polyvinyl chloride (PVC), galvanized coiled sheet steel, fabricated steel, carbon/epoxy thin shell and so on for the specific requirement of each project.
Galvashield™ - Embedded Galvanic Anodes, Purdue Ect Team
Galvashield™ - Embedded Galvanic Anodes, Purdue Ect Team
ECT Fact Sheets Archive
Repair of chloride-contaminated or carbonated concrete structures can result in accelerated corrosion problems on the reinforcing steel in adjacent concrete areas. Galvashield XP anodes provide localized corrosion protection in reinforced concrete buildings and structures. The palm-sized anode consists of a galvanic zinc core surrounded by an active cementitious matrix. These anodes are designed to reduce the ring anode corrosion commonly associated with concrete patch repairs and delay the onset of future corrosion.
Hot In Place Asphalt Recycling (Hipar), Purdue Ect Team
Hot In Place Asphalt Recycling (Hipar), Purdue Ect Team
ECT Fact Sheets Archive
With limited funds destined to highway maintenance, the need to repair and maintain highways at the lowest cost possible has created a need for cost-effective ways to rehabilitate existing pavements in preference of reconstruction. Hot-In-Place-Asphalt-Recycling is defined as a process of correcting asphalt pavement surface distress by softening the existing surface with heat, mechanically removing the pavement surface, mixing with recycling agent, possibly adding virgin asphalt and/or aggregate and replace it on the pavement without removing the recycled material from the original pavement site.
Unpaved Road Stabilizer, Purdue Ect Team
Unpaved Road Stabilizer, Purdue Ect Team
ECT Fact Sheets Archive
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 Archive
"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.
Dis Seismic Isolater, Purdue Ect Team
Dis Seismic Isolater, Purdue Ect Team
ECT Fact Sheets Archive
Seismic isolation bearings isolate a structure from the ground motion produced by an earthquake. The energy absorption devices are designed to absorb the energy associated with an earthquake. This seismic (Base) Isolator consists of alternate layers of rubber and steel bonded together, with a cylinder of pure lead tightly inserted through a hole in the middle. The rubber layers allow the isolator to easily displace sideways, reducing the earthquake loads felt by the building and its occupants. They also act as a spring, ensuring that the structure returns to its original position after the shaking has stopped.
Asphalt Paver Engineering Control Systems, Purdue Ect Team
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.
Paslode - Cordless Finish Nailer, Purdue Ect Team
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.
Movax Robotic: Hydraulic Vibratory Pile Driver, Purdue Ect Team
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 …
Safe Excavation, Purdue Ect Team
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.
Soft Trencher, Purdue Ect Team
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.
Soundless Chemical Demolition Agents, Purdue Ect Team
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.
Lumimark - Safety Traffic Marking System, Purdue Ect Team
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.
Dynamic Construction Visualizer, Purdue Ect Team
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.
Modular Frp Composite Bridge Deck, Purdue Ect Team
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.
Superpave System, Purdue Ect Team
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.
Recycled Plastic Composite Railroad Crossties, Purdue Ect Team
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.
Smart Concrete, Purdue Ect Team
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.
Digital Hardhat System, Purdue Ect Team
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.
Bridge Lock-Up Device System, Purdue Ect Team
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.
Primecontract.Com, Purdue Ect Team
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.
Prosidyc: Simulation Program For Construction Operations, Purdue Ect Team
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
An Industrial Gas Turbine/Compressor Package Designed For Rapid Installation And Commissioning, Purdue Ect Team
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 …