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Articles 151 - 180 of 227
Full-Text Articles in Civil Engineering
Chemical Cleaning Process For Porable Water Distrubution Pipe Systems, Purdue Ect Team
Chemical Cleaning Process For Porable Water Distrubution Pipe Systems, Purdue Ect Team
ECT Fact Sheets Archive
Aging potable water distribution pipe systems are becoming a major concern throughout the world. Deterioration of water quality and service as a result of micro biological tuberculation and corrosion continues to increase. Major costs for replacement or rehabilitation of distribution systems are being faced by most communities. The chemical cleaning solution is an organic oxide scavenger which is mixed with a predetermined quantity of muriatic acid and circulated through an isolated section of the water main.
Behavior-Based Safety In Construction, Purdue Ect Team
Behavior-Based Safety In Construction, Purdue Ect Team
ECT Fact Sheets Archive
Behavior-based safety approach that was introduced into the United States in 1930's and has been popular in manufacturing area since 1980's assumes that many of injuries and illnesses are the result of unsafe acts by workers. Behavior-based safety is a proactive approach to increasing safety in the workplace and in the community. It is based on sound, research-based, and behavioral practices, and are easy to use with minimal training.
Cable-Based Water Leak Detection Technology, Purdue Ect Team
Cable-Based Water Leak Detection Technology, Purdue Ect Team
ECT Fact Sheets Archive
Water leaks can be considered as a serious problem from many sources such as water supply and return chains, air conditioning units, cold-water chillers, clogged drains, damaged skylights or windows, or even construction errors. The new water leak detection technologies can provide significant advantages in cost, reliability, and easy adoption have continued since the traditional technology mainly focusing on a spot detector revealed several limitations.
Delmia Safework®Pro™ : Human Modeling, Purdue Ect Team
Delmia Safework®Pro™ : Human Modeling, Purdue Ect Team
ECT Fact Sheets Archive
Manufacturers and designers strive to develop products that conform to all relevant Health and Safety standards and are "user-friendly" while still maximizing the productivity of their own workforce. Digital human modeling technology can assist a designer to determine the performance of people in the context of a workplace or a product before it exists and throughout its entire lifecycle. SAFEWORK’S accurate manikin has the highest number of Anthropometric Variables (104), Segments (99) and Degrees of Freedom (149). It also has fully articulated spine & hand models as well as joints with coupled range of motion. Moreover, it’s unique Multivariate Algorithm …
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
ECT Fact Sheets Archive
Horizontal well technology has been widely used in petroleum and underground utility installation. Since late 1980's, the technology has been adapted for environmental remediation applications. Two general methods in drilling horizontal wells have been used in remediation, trenched and directionally-drilled. The first method involves the excavation of a relatively large diameter borehole, with simultaneous installation of well materials and backfill. The second method, directional drilling, produces a smaller diameter borehole and well materials are installed following the completion of drilling activities.
Plasma Arc Torch Technology, Purdue Ect Team
Plasma Arc Torch Technology, Purdue Ect Team
ECT Fact Sheets Archive
For many years, in-situ thermal vitrification has been recognized as one method to remediate contaminated soils and help stabilize land fills. However, the complexity of the process and the uncertainty of the results have limited the use of this remediation technique.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).The process of plasma remediation of …
Cranium: Device For Improving Crane Productivity And Safety, Purdue Ect Team
Cranium: Device For Improving Crane Productivity And Safety, Purdue Ect Team
ECT Fact Sheets Archive
Cranes are the most important pieces of equipment on many construction sites. CRANIUM is a video system designed to improve productivity and safety of crane operations by improving communications. A video camera mounted on the crane bottom transmits an image to the television monitor in the crane cab. The operator has a real-time picture of the loads and craftsmen that might otherwise be out of the direct line of sight.
Fiber-Optic Laser Technology For Decontaminating Metals, Purdue Ect Team
Fiber-Optic Laser Technology For Decontaminating Metals, Purdue Ect Team
ECT Fact Sheets Archive
Waterjet and abrasive blasting techniques has been used for decontaminating metals. The use of both techniques can pose environmental problems because the cleaning process created additional waste. The fiber-optic laser technology resulted from a collaboration between INEEL (Idaho National Environmental and Engineering Laboratory) scientists and researchers at another Department of Energy facility, Ames Laboratory in Ames, Iowa.
Smart Structures For Bridges, Purdue Ect Team
Smart Structures For Bridges, Purdue Ect Team
ECT Fact Sheets Archive
The critical deterioration of transportation infrastructure across the continent, including highways and bridges, has driven the search for new methods of concrete rehabilitation and repair. Researchers at University of Toronto's Institute for Aerospace Studies (UTIAS) are experimenting with a "smart" structure on the Leslie Street bridge in northern Toronto. The project, involves lining the bridge's columns with fiber optic sensors and wrapping them with advanced composite materials -- light-weight synthetic that covers the structure like plastic sandwich wrap.
In-Situ Vitrification, Purdue Ect Team
In-Situ Vitrification, Purdue Ect Team
ECT Fact Sheets Archive
While landfills are the predominant form of solid-waste disposal for municipalities in the U.S., people are objecting to the establishment of new landfills in their communities. Decreasing availability of land, worries about potential health problems and a growing concern for the environment have made the disposal of solid waste a challenge. This technology represents a safety improvement. There is no need for contaminated soil transportation and handling. The need for disposal landfills disappears. Any type of radioactively contaminated buried waste unit, which because of its high activity represents significant risk for exhumation and re-disposal, would be a potential application for …
Ust(Underground Storage Tanks) Leak Detection System, Purdue Ect Team
Ust(Underground Storage Tanks) Leak Detection System, Purdue Ect Team
ECT Fact Sheets Archive
Low range differential pressure (LRDP) leak detection system used to detect leaks in underground storage tanks (UST) was developed by Vista Research, Inc. This leak detection and monitoring system is used for early detection of small leaks in bulk fuel UST’s. The technology works independently of the tank size and rate of leakage as low range differential pressure (LRDP) system is a mass-based.
Real-Time Construction Component Tracking System, Purdue Ect Team
Real-Time Construction Component Tracking System, Purdue Ect Team
ECT Fact Sheets Archive
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.
Electromagnetic Acoustic Transducers (Emat), Purdue Ect Team
Electromagnetic Acoustic Transducers (Emat), Purdue Ect Team
ECT Fact Sheets Archive
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.
Infrared Gas Sensor, Purdue Ect Team
Infrared Gas Sensor, Purdue Ect Team
ECT Fact Sheets Archive
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 Archive
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 Archive
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.
Gfrc Facade Panels With Steel Stud/Flex Anchor Connection, Purdue Ect Team
Gfrc Facade Panels With Steel Stud/Flex Anchor Connection, Purdue Ect Team
ECT Fact Sheets Archive
The ability of building cladding systems to perform successfully depends primarily on their proper design and construction. Current practices in the United States utilize GFRC (Glass Fiber Reinforced Concrete) panels. However, new problems are being detected with such systems. The facade and its attachments (using GFRC) are not being adequately implemented to accommodate vertical and horizontal differential movement between the panels and concrete frame which is resulting in failure or cracking of the panels, and chipping off of the supporting concrete. With proper design and construction, steel stud-framed GFRC-skin cladding concept provides a versatile system for freedom of expression in …
Substiwood™ - Concrete Lumber, Purdue Ect Team
Substiwood™ - Concrete Lumber, Purdue Ect Team
ECT Fact Sheets Archive
In the United States, wood lumber products have always formed the primary (and secondary) elements of many types of construction, especially in the single-and multi-family housing sector. A new cementitious material, 'concrete lumber' products (SubstiwoodTM) developed by Substiwood Inc. is structurally strong, durable, nailable with conventional screws and nails, and sawable using hand or electric saws. Unlike other construction alternatives to wood framing, the SubstiwoodTM products essentially maintain the existing wood frame construction methods, processes, equipment, and skilled labor.
Ultrascreen - Sight And Sound Barrier Partition Walls, Purdue Ect Team
Ultrascreen - Sight And Sound Barrier Partition Walls, Purdue Ect Team
ECT Fact Sheets Archive
Panels have been widely used for many years to act as sight and sound barriers in most of the highways and in residential areas where visual privacy is needed. The United States Gypsum Company, early in the 1980's started developing technologies to improve and reduced costs using lightweight cement panels. Recently, USG along with AFM Corporation introduced ULTRASCREEN: Sight and Sound Barrier. This lightweight panels require no special equipment for installation, maintenance, or replacement making them beneficial. This latest development also creates a system with good acoustical performance and excellent strength to weight ratio.
Atlss Integrated Building System, Purdue Ect Team
Atlss Integrated Building System, Purdue Ect Team
ECT Fact Sheets Archive
The AIBS (ATLSS Integrated Building Systems) program was developed to coordinate ongoing research projects in automated construction and connection systems. The objective of this technology is to design, fabricate, erect, and evaluate cost-effective building systems with a focus on providing a computer integrated approach to these activities.
Polymer Concrete Pipes, Purdue Ect Team
Polymer Concrete Pipes, Purdue Ect Team
ECT Fact Sheets Archive
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.
Frp Rebar (Afrp, Cfrp, Gfrp), Purdue Ect Team
Frp Rebar (Afrp, Cfrp, Gfrp), Purdue Ect Team
ECT Fact Sheets Archive
Insufficient concrete cover, poor design or workmanship, and presence of large amounts of aggressive agents including environmental factors all can lead to cracking of the concrete and corrosion of the steel rebar. The problems of steel corrosion are avoided with the use of FRPs because FRP materials are nonmetallic and noncorrosive. In addition, FRP materials exhibit several properties including high tensile strength, that make them suitable for the use as structural reinforcement. Furthermore, codes and design guide provisions have been recently prepared for the use of FRP bars in concrete structures for bridges and buildings.
New Infrastructure Repair Method - Fiber Reinforced Plastics, Purdue Ect Team
New Infrastructure Repair Method - Fiber Reinforced Plastics, Purdue Ect Team
ECT Fact Sheets Archive
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.
Frp Deck - Rehabilitation Of A Steel Truss Bridge, Purdue Ect Team
Frp Deck - Rehabilitation Of A Steel Truss Bridge, Purdue Ect Team
ECT Fact Sheets Archive
To avoid a costly bridge replacement project, the New York State Department of Transportation partnered with private industry to rehabilitate a steel truss bridge using lightweight composites. Reducing dead load on the bridge by 265 tons, the application of composite deck technology doubled the load ratings (to a level higher than the original design) and allowed weight restrictions to be removed, while saving $1.4 million. This was the first time this type of rehabilitation was accomplished in the U.S. FRP bars appear to be promising alternative to steel reinforcement in concrete structures such as marine structures, parking structures, bridge decks, …
Surtreat - Concrete Restoration & Protection System, Purdue Ect Team
Surtreat - Concrete Restoration & Protection System, Purdue Ect Team
ECT Fact Sheets Archive
Reinforcing steel corrosion is the most common cause of failure of concrete structures. Once started, rebar corrosion can not be stopped by simply waterproofing the surface of the concrete. Surtreat is a proprietary concrete restoration and protection system. The system includes sequential application of chemical treatments to improve the properties of the deteriorating concrete and protect new structures.
Simcon: Slurry Infiltrated Mat Concrete, Purdue Ect Team
Simcon: Slurry Infiltrated Mat Concrete, Purdue Ect Team
ECT Fact Sheets Archive
The cost of civil infrastructure constitutes a major portion of the national wealth. Its rapid deterioration has thus created an urgent need for the development of novel, long-lasting and cost-effective methods for repair, retrofit and new construction. A promising new way of resolving this problem is to selectively use advanced composites, such as High-Performance Fiber Reinforced Cementitious Composites (HPFRCCs). The investigations conducted in North Carolina University have demonstrated that a special type of continuous fiber-mat HPFRCC, called SIMCON which stands for Slurry Infiltrated Mat Concrete, is well suited for the development of novel repair, retrofit and new-construction solutions that lead …
Use Of Recycled Tire Rubber In Concrete, Purdue Ect Team
Use Of Recycled Tire Rubber In Concrete, Purdue Ect Team
ECT Fact Sheets Archive
More than 250 million scrap tires weighing more than 3 million tons are generated each year in the United States. This is considered as one of the major environmental challenges facing municipalities around the world because waste rubber is not easily biodegradable even after a long period of landfill treatment. One of the solutions suggested is the use of tire rubber particles as additives in cement-based materials. Experiments under the laboratory environments commonly presented that the use of rubber in the concrete cement mix reduced drying shrinkage, brittleness, and elastic modulus, which might improve the overall durability and serviceability of …
Snap Joint Technology For Composite Structures, Purdue Ect Team
Snap Joint Technology For Composite Structures, Purdue Ect Team
ECT Fact Sheets Archive
The optimum composite joint design is the one capable of distributing stresses over a wide area rather than to concentrate them at a point. Adhesively bonded joints can satisfy these requirements, however, most of the adhesives are brittle, and brittle failure is unavoidable. This was the motivation of developing what is called the SNAP joint. The snap joint technology developed by W. Brandt Goldworthy & Associates, Inc. The concept is based on similar joining technology used for connecting wooden parts (wood is considered as natural orthotropic composites). Also, this technique is very similar to techniques which were used a decade …
Precast Inverted T Beam, Purdue Ect Team
Precast Inverted T Beam, Purdue Ect Team
ECT Fact Sheets Archive
Current systems are either costly or time consuming to erect and have limitations. Cast-in-place slabs have become too expensive and time-consuming due to extensive field formwork. The Nebraska Inverted Tee (IT) system was designed for use by small contractors in sparsely populated areas where relatively modest erection equipment exists. The ITs were developed in "hard" metric units, i.e., using round-figure millimeters.
Conductive Concrete, Purdue Ect Team
Conductive Concrete, Purdue Ect Team
ECT Fact Sheets Archive
Concrete has been used for many years as a composite material that has excellent mechanical properties and durability for construction. However, concrete is a poor electrical conductor, especially under dry conditions. Traditional methods can warm roads, but installation cost is high and the procedure is complicated. A research team in Material Laboratory of Institute for Research in Construction, National Research Council Canada, led by Dr. James J. Beaudoin, has developed a new conductive concrete with both superior electrical conductivity and mechanical properties.