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Articles 391 - 420 of 842

Full-Text Articles in Civil and Environmental Engineering

Ehydraulic Pneumatic Fracturing, Purdue Ect Team Jan 2007

Ehydraulic Pneumatic Fracturing, Purdue Ect Team

ECT Fact Sheets Archive

The technology is an enhancement process designed for integration with primary in-situ treatment technologies such as vapor extraction, bioremediation, thermal treatment, and 'pump and treat'. Fractures in dense soils are created, using hydraulic or pneumatic methods, making existing fractures larger to get at contaminants and allowing a more effective distribution of the extractive air throughout the soil. Pneumatic Fracturing was jointly developed by Accutech Remedial Systems Inc. and the New Jersey Institute of Technology. It involves the injection of air (or another gas) into a contaminated geologic formation at sufficient pressure and flow rate to create artificial fractures or to …

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Electro Osmotic Pulse Technology For Prevention Of Water Intrusion In Concrete Structure, Purdue Ect Team Jan 2007

Electro Osmotic Pulse Technology For Prevention Of Water Intrusion In Concrete Structure, Purdue Ect Team

ECT Fact Sheets Archive

Groundwater intrusion into a building can cause serious structural degradation, corrosion of expensive mechanical equipment. ElectroOsmotic Pulse (EOP) technology is based on the concept of electroosmosis; the movement of an electrically charged ion in a liquid under the influence of an external electric field. EOP not only eliminates water-seepage problems from the interior of the structure without excavation, but it further mitigates corrosion damage to mechanical equipment and reduces the interior relative humidity of the basements.

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Soundprint: Continuous Acoustic Monitoring For Structure, Purdue Ect Team Jan 2007

Soundprint: Continuous Acoustic Monitoring For Structure, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Arcagent – Weld Process Quality Monitoring System, Purdue Ect Team Jan 2007

Arcagent – Weld Process Quality Monitoring System, Purdue Ect Team

ECT Fact Sheets Archive

The ARCAgent 2000 is a real-time monitoring and alarming unit for automated and semi-automated arc welding (GMAW, GTAW, FCAW, SAW, SMAW) applications. The ruggedized ARCAgent 2000 uses an embedded microprocessor for high speed analysis of arc current, supply voltage, gas flow, wire feed speed, and an additional 4-20 mA sensor to verify the weld process parameters. When process problems are detected, context specific diagnostics information is displayed directly to the operator for corrective action.

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Alternative Material Dowel Bars For Rigid Pavement Joints, Purdue Ect Team Jan 2007

Alternative Material Dowel Bars For Rigid Pavement Joints, Purdue Ect Team

ECT Fact Sheets Archive

Over the last thirty to forty years, dowel support of the joint in Rigid Joint Pavement (RJP) has been widely used. The problem of deterioration of concrete pavement joints has resulted in the search for alternate solutions. Fiber-reinforced polymer (FRP) and stainless steel represent corrosion resistant alternatives to conventional galvanized steel in this application. The recently study by the FHWA of Alternative Materials for Highway Construction demonstrated that even with extended wet-dry cycles of exposure to fluids of high chloride content, at various temperatures and PH levels, stainless steel had corrosion resistance hundreds and in many cases thousands of times …

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Encapco Emulsified Treated Base Product, Purdue Ect Team Jan 2007

Encapco Emulsified Treated Base Product, Purdue Ect Team

ECT Fact Sheets Archive

Encapco’s organic-based asphalt emulsion is used to immobilize lead in contaminated soil. Unlike other fixation or stabilization technologies, which physically bind contaminants in the soil matrix, Encapco’s emulsion is capable of chemically fixating lead. The Encapco process employs a chemical binding reaction in addition to encapsulation to meet regulatory leaching tests. The Encapco process has been evaluated on a number of contaminated materials ranging from silty sand from a quarry site, contaminated sand from a steel mill, and a foundry sand.

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Acoustic Wave Sensors, Purdue Ect Team Jan 2007

Acoustic Wave Sensors, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Fiber Optic Sensor : Monitoring Precast Beams, Purdue Ect Team Jan 2007

Fiber Optic Sensor : Monitoring Precast Beams, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Precast Concrete Beam-To-Column Connection System, Purdue Ect Team Jan 2007

Precast Concrete Beam-To-Column Connection System, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Tru-Frame Steel Truss, Purdue Ect Team Jan 2007

Tru-Frame Steel Truss, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Attachment Of Steel Decking Using Mechanical Fasteners And Powder Actuated Or Pneumatic Tools, Purdue Ect Team Jan 2007

Attachment Of Steel Decking Using Mechanical Fasteners And Powder Actuated Or Pneumatic Tools, Purdue Ect Team

ECT Fact Sheets Archive

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.

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Pipeman:Safety In Trenches, Purdue Ect Team Jan 2007

Pipeman:Safety In Trenches, Purdue Ect Team

ECT Fact Sheets Archive

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 …

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Smart Sewer Assessment Systems, Purdue Ect Team Jan 2007

Smart Sewer Assessment Systems, Purdue Ect Team

ECT Fact Sheets Archive

The need for accurate preventive assessment of sewer conditions is increasing world wide. The new method utilizes qualified inspection systems that are automated and that utilize artificial intelligence to assess whether or not a crack in the surface of the pipe exists. The KARO system is one example. Developed by the German Federal Ministry of Education, Science, Research, and Technology (BMBF) and four partners from both industry and research institutions. This system is composed of a mobile control and surveillance station, and a mobile robot.

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Virtualstep: 4d Simulation, Purdue Ect Team Jan 2007

Virtualstep: 4d Simulation, Purdue Ect Team

ECT Fact Sheets Archive

The main value from 4D is derived from using it proactively to visualize the construction sequence. Another benefit is the ability to run what-if scenarios to determine optimum scheduling and resource management. Also, by linking 3D drawings to a project schedule, all project stakeholders, from the owner to the tiling subcontractor, can see how the project is supposed to progress. VirtualSTEP Products include 4D Project Navigator, Conflict Coordinator, Project Reporter, and Project Analyzer. All these products are web-based.

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Pneumatic Capsule Pipeline, Purdue Ect Team Jan 2007

Pneumatic Capsule Pipeline, Purdue Ect Team

ECT Fact Sheets Archive

Pneumatic capsule pipeline (PCP) uses wheeled capsules (vehicles) to carry cargoes through a pipeline filled with air. Modern large diameter PCP systems utilize through flow booster pumps, also known as jet pump injectors. These create the pressure differentials required to propel multiple capsules through a pipeline, while allowing both terminals at atmospheric pressure. This is done by placing a booster pump midway along the pipeline, and designing it in such a way that capsules can bypass the pump.

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Lean Project Delivery System, Purdue Ect Team Jan 2007

Lean Project Delivery System, Purdue Ect Team

ECT Fact Sheets Archive

The Lean Construction Institute, (LCI), founded in August 1997, is currently doing research to develop knowledge regarding the design and implementation of project based production systems in the design, engineering, and construction of capital facilities. Lean Project Delivery System (LPDS) model consists of 13 modules, 9 of which are organized in 4 interconnecting triads or phases extending from project definition to design to supply and assembly, plus 2 production control modules and the work structuring module, both conceived to extend through all project phases, and the post-occupancy evaluation module, which links the end of one project to the beginning of …

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Palm Estimating, Purdue Ect Team Jan 2007

Palm Estimating, Purdue Ect Team

ECT Fact Sheets Archive

Estimators need a way to increase efficiency and lessen the chance for error when collecting estimate information in the field. With Palm Estimating from Timberline, users can have access to the same Precision estimating data they use in the office. Cover page information, item numbers and descriptions, assembly numbers and descriptions, WBS codes, variables and variable help can all be stored on a hand-held device. This ensures estimators have the information they need to collect all of the project details necessary to deliver an accurate, complete bid.

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Hybrid Computerized Decision Support System For Infrastructure Assessment, Purdue Ect Team Jan 2007

Hybrid Computerized Decision Support System For Infrastructure Assessment, Purdue Ect Team

ECT Fact Sheets Archive

Currently, assessment techniques are performed subjectively, time consuming, and rely mostly on human visual inspection. Such subjective assessment methods have been identified as a critical obstacle to effective infrastructure management. The hybrid computerized decision support system for construction quality assessment applies concepts in the fields of machine learning, pattern recognition, and image processing. The system will automate the assessment process by acquiring digital images of the areas to be assessed and analyzing the images to identify and measure defects. Moreover, sample images will be used to train the system to acquire expert knowledge in identifying the defects and using this …

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Radio Frequency Identification (Rfid) Tag, Purdue Ect Team Jan 2007

Radio Frequency Identification (Rfid) Tag, Purdue Ect Team

ECT Fact Sheets Archive

For the receipt and tracking of pipe supports material at construction jobsites, the proprietary electronic identification tags, RFID (Radio Frequency Identification) was designed and manufactured by SAT Corporation. A RFID system consist of two major components (reader and the tag) which work together to provide the user with a non-contact solution to uniquely identify people, assets, and locations.

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Production Of Construction Materials Using Advanced Recycling Technologies, Purdue Ect Team Jan 2007

Production Of Construction Materials Using Advanced Recycling Technologies, Purdue Ect Team

ECT Fact Sheets Archive

Waste reduction, material reuse, and use of recycle-content products can be focused on the management system somewhat. In contrast, material recycling is the technical issue how to create new materials using wastes. Thus, three advanced recycling technologies; 1) Synthetic Lightweight Aggregate technology (SLA), 2) Clean Coal Technology (CCT), and 3) RP-1 Polymer Identification System are introduced.

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Storm Chamber Technology For Storm Water Storage And Gray Water Management And Reuse, Purdue Ect Team Jan 2007

Storm Chamber Technology For Storm Water Storage And Gray Water Management And Reuse, Purdue Ect Team

ECT Fact Sheets Archive

StormChamber™ is an open bottom, arch-shaped, HDPE infiltration chamber which functions in both permeable and non-permeable soils for subsurface retention, detention, recharge and reuse of storm water, or gray water, designed to overcome the deficiencies of other technologies. It provides a higher level of nutrient and pollutant removal by taking advantage of the natural biological and physical properties of the soil. StormChamber™ systems mimic pre-development conditions by putting post-construction run off back into the ground approximately where it used to go, maintaining base flow to streams, wetlands, lakes, ponds and countering salt-water intrusion in coastal areas.

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Asbestos Removal System (Envirosystem), Purdue Ect Team Jan 2007

Asbestos Removal System (Envirosystem), Purdue Ect Team

ECT Fact Sheets Archive

A new asbestos removal system called EnviroSystem(TM) has been developed by CUPS Systems, Inc., and GRI (Gas Research Institute). It basically comprises a portable line traveling system that is composed of a high-pressure water jet coating removal device, called HydroKleaner, a vacuum pump, a side boom, a pump sled, a process sled, and a 20 cu.yd. disposal container. The system is operated by workers wearing protective gear and clothing.

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Rp-1 Polymer Identification System : Recycler Of Plastics, Purdue Ect Team Jan 2007

Rp-1 Polymer Identification System : Recycler Of Plastics, Purdue Ect Team

ECT Fact Sheets Archive

It has been noticed that one of the primary obstacles in recycling is the lack of sufficient means to avoid cross contamination during collection. In particular, the new method to quickly and easily identify materials has been demanded in plastic industry due to the dramatic acceleration of plastic consumption in the last forty years. SpectraCode's new technology enables the instant point-and-shoot identification of black plastics, extracting a definitive signature from most black plastics in half a second or less. This speed is achieved through a modified probe that uses a sampling technique SpectraCode calls distributed focusing. This technology, when used …

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Dma™: Digestion Material For Asbestos, Purdue Ect Team Jan 2007

Dma™: Digestion Material For Asbestos, Purdue Ect Team

ECT Fact Sheets Archive

Current techniques for removing asbestos- containing fireproofing require the construction of air-tight barriers, labor- intensive scraping of the fireproofing, and the installation of new asbestos-free fireproofing. The DMATM product is the result of a joint development by W.R. Grace & Co. and Department of Energy's Brookhaven National Laboratory. The new technology uses a foamy solution sprayed directly onto asbestos-containing fireproofing. After absorbing into the fireproofing, the foam chemically digests asbestos fibers and dissolves them into harmless minerals. The process is the first to chemically destroy asbestos without first removing the fireproofing.

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Glass Diaphragm Walls, Purdue Ect Team Jan 2007

Glass Diaphragm Walls, Purdue Ect Team

ECT Fact Sheets Archive

The materials currently applied to confine contaminated soils are not the best solution (ex. slurry walls). A new contaminant confining material is presented where the costs of digging and hauling the contaminated soil are eliminated. For contaminant enclosure, the new technology incorporates a diaphragm wall system consisting of special glass panels with a sealing made out of glass.

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Reinforced Cage Robot For Concrete Beams And Colums, Purdue Ect Team Jan 2007

Reinforced Cage Robot For Concrete Beams And Colums, Purdue Ect Team

ECT Fact Sheets Archive

The robot or machine, which builds reinforcing cages required for concrete beams and columns, places the longitudinal bars on a jig, then places and ties the hoop reinforcing bars to the longitudinal bars automatically. All the operator must do is turn the machine on, align the hoop bars on the machine, and attach the necessary rigging to the cage for removal after the machine has finished.

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Air Ventilation Protection System For Building Security, Purdue Ect Team Jan 2007

Air Ventilation Protection System For Building Security, Purdue Ect Team

ECT Fact Sheets Archive

The new technology to solve the limitation of conventional Collective protection equipment (CPE) system has been developed as "Combined ESP/ESF/PCO and microfibrous media CPE application". This concept of this new technology is the combination of the both systems; 1) Microfibrous Material Technology, and 2) Photocataytic Oxidation Technology.

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Funnel & Gate System, Purdue Ect Team Jan 2007

Funnel & Gate System, Purdue Ect Team

ECT Fact Sheets Archive

The limited success and high cost of traditional 'active' ground-water-contaminant plume management efforts (i.e., pump-and-treat systems) has stimulated a search for less expensive 'passive' plume interception and in-situ treatment technologies. The 'funnel and gate system,' which uses heterogeneous (surface-mediated) reactions on porous media to degrade dissolved contaminants, is one passive technology under consideration.

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In Situ Enhanced Soil Mixing, Purdue Ect Team Jan 2007

In Situ Enhanced Soil Mixing, Purdue Ect Team

ECT Fact Sheets Archive

In Situ Enhanced Soil Mixing (ISESM) is a remediation technology that has been used to remediate soils contaminated with volatile organic compounds (VOCs). The technology was developed by industry with the assistance of the U.S. Department of Energy’s Office of Science and Technology and the Office of Environmental Restoration.

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Emerging Video Surveillance And Monitoring Technologies, Purdue Ect Team Jan 2007

Emerging Video Surveillance And Monitoring Technologies, Purdue Ect Team

ECT Fact Sheets Archive

The traditional video surveillance applications have some limitations; 1) one unit per one person in one place, 2) the limited area for surveillance due to the location of cameras 3) increasing operating cost, 4) hard reductions in theft and claim rates over the long term. Recently, video technology has grown by leaps and bounds throughout the last few years due to the steep development of Information Technology (IT). The newest video surveillance technologies seem to be taking two aspects: 1) Digital Video Surveillance (DVS) of a turn toward digital video servers using Internet access, and 2) Multi-modal User Interface (MUI).

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