Open Access. Powered by Scholars. Published by Universities.®
Civil and Environmental Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Construction (53)
- Construction material (24)
- Construction equipment (10)
- Software (9)
- Soil (9)
-
- Communication (8)
- Remediation (8)
- Contamination (6)
- Safety (6)
- Security (6)
- Pipe (5)
- Sensor (5)
- Corrosion (4)
- Foundation (4)
- Material (4)
- Mobile (4)
- Real time (4)
- Simulation (4)
- Assessment (3)
- Automation (3)
- Concrete structure (3)
- Excavation (3)
- Frp (3)
- Identification (3)
- In-situ (3)
- Monitoring (3)
- Panel (3)
- Structure (3)
- 3d (2)
- Asbestos (2)
Articles 31 - 60 of 187
Full-Text Articles in Civil and Environmental Engineering
Galvashield™ - Embedded Galvanic Anodes, Purdue Ect Team
Galvashield™ - Embedded Galvanic Anodes, Purdue Ect Team
ECT Fact Sheets
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.
Automated Spray Pothole Patching Truck, Purdue Ect Team
Automated Spray Pothole Patching Truck, Purdue Ect Team
ECT Fact Sheets
The RA-300 patcher, manufactured by Rosco Manufacturing, Madison, S.D., is a fully automated spray patching road maintenance vehicle, which fills potholes and cracks on the road. A operator can control all patching functions with the control panel and joystick from the safety and comfort of the truck cab.
Corrosion Inhibitors For Reinforced Concrete, Purdue Ect Team
Corrosion Inhibitors For Reinforced Concrete, Purdue Ect Team
ECT Fact Sheets
Steel corrosion in reinforced concrete structures has been a major problem across the U.S. Steel-reinforced concrete structures are continually subject to attack by corrosion brought on by naturally occurring environmental conditions. FerroGard, a corrosion inhibitor, developed by Sika Corporation, penetrates hardened concrete to dramatically reduce corrosion by 65% and extend the structure's service life.
Stay-In-Place (Sip) Formwork, Purdue Ect Team
Stay-In-Place (Sip) Formwork, Purdue Ect Team
ECT Fact Sheets
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.
Movax Robotic: Hydraulic Vibratory Pile Driver, Purdue Ect Team
Movax Robotic: Hydraulic Vibratory Pile Driver, Purdue Ect Team
ECT Fact Sheets
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 …
Dis Seismic Isolater, Purdue Ect Team
Dis Seismic Isolater, Purdue Ect Team
ECT Fact Sheets
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.
Safespantm: Multi-Span Bridge Decking And Shielding, Purdue Ect Team
Safespantm: Multi-Span Bridge Decking And Shielding, Purdue Ect Team
ECT Fact Sheets
Contractors in bridge rehabilitation have been experiencing risks and difficulties associated with their line of work: safety and inspection issues, environmental concerns, business interruption, emergency situations, and rising labor costs. Safespan™ Multi-Span Bridge Platform System was developed by James Frangos and Lambros Apostolopoulos in 1995 to alleviate the obstacles found in bridge rehabilitation. The system designs are flexible. It uses various methods to connect the platform to the structure, depending on the bridge's configuration, that allow contractors to adjust the platform's height for a desired working clearance.
Bladepro: 3d Automatic Grade Control System, Purdue Ect Team
Bladepro: 3d Automatic Grade Control System, Purdue Ect Team
ECT Fact Sheets
Currently most of the methods to control grading equipment to achieve the required production accuracy are based on conventional surveying, such as grade stakes and stringlines. BladePro System, developed by Spectra Precision in 1998, is a dual automatic blade control system that uses advance computer technology and user friendly operator controls. This system provides contractors a three dimensional machine control system for roads, railway beds and airport runway construction.
Amir: Asphalt Multi Integrated Roller, Purdue Ect Team
Amir: Asphalt Multi Integrated Roller, Purdue Ect Team
ECT Fact Sheets
Conventional rolling equipment, such as steel vibratory rollers, while capable of achieving a specified density, results in construction induced cracks. These cracks are often visually apparent, and they are due to a mismatch between the geometry and relative rigidity of the roller and the asphalt mix. Asphalt Multi Integrated Roller (AMIR) was developed to compact asphalt and to prevent the surface cracking of pavement. AMIR was developed by replacing the cylindrical stiff shape with a moving flat softer plate which results in a crack free asphalt layer and more uniform compaction along and across the mat.
Ar2000 Super Recycler, Purdue Ect Team
Ar2000 Super Recycler, Purdue Ect Team
ECT Fact Sheets
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.
Hot In Place Asphalt Recycling (Hipar), Purdue Ect Team
Hot In Place Asphalt Recycling (Hipar), Purdue Ect Team
ECT Fact Sheets
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.
Asphalt Paver Engineering Control Systems, Purdue Ect Team
Asphalt Paver Engineering Control Systems, Purdue Ect Team
ECT Fact Sheets
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.
3d-Mc Three Dimensional Machine Control, Purdue Ect Team
3d-Mc Three Dimensional Machine Control, Purdue Ect Team
ECT Fact Sheets
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
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.
Soft Trencher, Purdue Ect Team
Soft Trencher, Purdue Ect Team
ECT Fact Sheets
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.
Soil-Stiffness Gauge For Soil Compaction Control, Purdue Ect Team
Soil-Stiffness Gauge For Soil Compaction Control, Purdue Ect Team
ECT Fact Sheets
Soil stiffness and modulus are the most meaningful engineering parameters for soil structures. Until now, there were no practical and reliable means to rapidly measure the in-situ soil stiffness and elastic modulus of soils. The Humboldt Stiffness Gauge (HSG) enables both the design and construction to be controlled by the same physical parameters, namely stiffness and modulus. Used as a compaction process control tool, it brings the contractor closer to the real purpose of compaction, which is to improve the stability of the soil over the life of the structure. The HSG's sensitivity and ability to rapidly take large amounts …
Lumimark - Safety Traffic Marking System, Purdue Ect Team
Lumimark - Safety Traffic Marking System, Purdue Ect Team
ECT Fact Sheets
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.
Deep Mixing Method For Ground Improvement, Purdue Ect Team
Deep Mixing Method For Ground Improvement, Purdue Ect Team
ECT Fact Sheets
Many causes including presence of peats and highly organic soils in construction projects increase the risk of foundation failure or inadmissible settlements due to low strengths, high compressibility, prolonged creep, and low permeability. The Deep Mixing Method (DMM), also known in parts of the U.S. as soil mixing, is an in situ soil treatment and improvement technology mechanically blending the in situ soil with cementitious materials that are referred to as binders using a hollow stem auger and paddle arrangement.
Osterberg Load Cell, Purdue Ect Team
Osterberg Load Cell, Purdue Ect Team
ECT Fact Sheets
Establishing the bearing capacity of piles, piers, and shafts is difficult and expensive for engineers to determine. The Osterberg Load Cell allows geotechnical engineers to determine the capacity of drilled shafts, piers, and driven piles. It is used to test for the bearing and skin friction forces that can be developed in the soil through which the shaft, pier, or pile is placed.
Kwik-Kap Metal Roof Fastener Seals, Purdue Ect Team
Kwik-Kap Metal Roof Fastener Seals, Purdue Ect Team
ECT Fact Sheets
Metal roof leaks cause damage to insulation and energy loss, structural damage that deteriorates supporting beams and damage to building contents. The major cause of metal roof leaks is fastener movement. The Kwik-Kap is an aluminum faced conforming disc with a heavy modified asphalt base. This proven material has survived more than 100,000 cycles with no signs of cracking or other failure.
Mortarless Concrete Blocks, Purdue Ect Team
Mortarless Concrete Blocks, Purdue Ect Team
ECT Fact Sheets
Traditional concrete block systems are expensive to construct, not as structurally sound as concrete walls, and do not have the ability to conceal any mechanical or electrical systems easily. The Intralock System is a mortarless concrete block building system comprised of blocks with six different internal configuration that form three separate air cores when stacked in a single thickness.
Autoclaved Aerated Concrete, Purdue Ect Team
Autoclaved Aerated Concrete, Purdue Ect Team
ECT Fact Sheets
High energy costs, increasingly expensive construction labor and equipment, and a higher environmental consciousness of home owners, has forced home builders to search for new construction materials. Autoclaved Aerated Concrete (AAC) is well known as an environmentally friendly construction material. Compared to the energy consumed in production of many other basic building materials, only a fraction is required to produce AAC. Raw material consumption is very low for the amount of finished product produced.
High Performance Steel, Purdue Ect Team
High Performance Steel, Purdue Ect Team
ECT Fact Sheets
High strength steels have been available for years, but their use required more welding control and fabrication processes than conventional strength steels. A new grade of high performance steel, HPS-485W or HPS-70W, developed by a cooperative program between the Federal Highway Administration, the American Iron and Steel Institute, and the Department of the Navy in August 1994; uses a new chemical composition that provides improved welding and toughness properties.
Tru-Frame Steel Truss, Purdue Ect Team
Tru-Frame Steel Truss, Purdue Ect Team
ECT Fact Sheets
After earthquakes, repair and replacement of structural elements is time consuming and expensive. This new truss system contains several diagonal elements designed to absorb seismic energy and yield at prescribed levels. Standard moment frame design requires 100% visual inspection and ultrasonic testing which is eliminated when using the Tru-Frame system. Since all Tru-Frame connections are single pass fillet welds and tension control bolts, they can be visually inspected any time after completion without need for additional testing. This allows subsequent trades to start their work sooner.
Post-Tensioned Steel Structure, Purdue Ect Team
Post-Tensioned Steel Structure, Purdue Ect Team
ECT Fact Sheets
Welded steel Moment-Resisting Frames (MRFs) were long considered as one the most earthquake-resistant types of structures. Recently, the idea of applying the post-tensioning technology to achieve moment resistant structural systems has been investigated at the University of California, San Diego. Since 1996, moment-resisting connections using post-tensioning concepts have been developed and tested for precast concrete beam-to-column connections, and concrete shear walls.
Attachment Of Steel Decking Using Mechanical Fasteners And Powder Actuated Or Pneumatic Tools, Purdue Ect Team
Attachment Of Steel Decking Using Mechanical Fasteners And Powder Actuated Or Pneumatic Tools, Purdue Ect Team
ECT Fact Sheets
An alternative method of attaching steel metal decks onto open web bar joist or structural steel beams. Erectors require a fast, reliable, efficient fastening method that can be used independent of weather conditions, and is easy, cost effective and verifiable. Attachment of the deck panels has historically been performed using puddle welding, with self-drilling screws used only when necessary. Today, special nails, driven either by powder propellant (powder actuated tools) or by compressed air (pneumatic tools), are experiencing ever-increasing usage due to the speed, versatility and cost-effectiveness benefits derived by the installer and owner.
Friction Pendulum™ - Seismic Isolation Bearings, Purdue Ect Team
Friction Pendulum™ - Seismic Isolation Bearings, Purdue Ect Team
ECT Fact Sheets
Recent large earthquakes in Turkey, Taiwan, and Japan have wreaked terrible destruction in highly urbanized areas. Preventing such tragic loss of life and damage to society's infrastructure is the aim of Friction PendulumTM seismic isolation bearings, a technology developed with the support of the National Science Foundation's (NSF) Small Business Innovation Research (SBIR) program.
Bridge Lock-Up Device System, Purdue Ect Team
Bridge Lock-Up Device System, Purdue Ect Team
ECT Fact Sheets
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.
Precast Concrete Beam-To-Column Connection System, Purdue Ect Team
Precast Concrete Beam-To-Column Connection System, Purdue Ect Team
ECT Fact Sheets
Compared to conventional concrete constructions, precast concrete is a better option which is more cost-effective for production, transport, and erection when columns and beams can be fabricated independently. The BSF connection is a hidden beam and connection for gravity loads that eliminates the need for projecting column corbels. From a steel box cast into the concrete beam end, a sliding steel “knife” plate with a safety notch is cantilevered into a steel box that has been cast into the concrete column.
Atlss Beam-To-Column Connections, Purdue Ect Team
Atlss Beam-To-Column Connections, Purdue Ect Team
ECT Fact Sheets
The ATLSS Connection (AC) is a new beam-to-column connection consisting of a tenon, which is bolted and welded to the end of the beam, and a mortise, which is attached to the column and into which the tenon is dropped. It is safer, easier, and faster to erect and fit-up than traditional beam-to-column connections.