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Articles 151 - 180 of 340
Full-Text Articles in Civil Engineering
Procurezone.Com, Purdue Ect Team
Procurezone.Com, Purdue Ect Team
ECT Fact Sheets Archive
TProcureZone.com is a comprehensive procurement system. On-line functions include: estimating the cost of a purchase; preparing and issuing detailed specifications and complete requests for proposals; requesting bids from selected suppliers; communicating with bidders; receiving, comparing, and evaluating bids; negotiating offers and conducting auctions; issuing purchase orders with all required attachments; making payment; and monitoring schedules and deliveries.
Armstrong I-Ceilings - Wireless Systems, Purdue Ect Team
Armstrong I-Ceilings - Wireless Systems, Purdue Ect Team
ECT Fact Sheets Archive
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.
Self-Placing Concrete, Purdue Ect Team
Self-Placing Concrete, Purdue Ect Team
ECT Fact Sheets Archive
Certain concrete pours have areas where the congestion of reinforcing bars make placement of concrete almost impossible. Using conventional placing and vibration techniques, the resulting concrete can have considerable honeycombing due to the development of voids. Self-placing concrete is a possible solution to the problem. Also known as self-compactable concrete, self-consolidating concrete, flowable concrete, and non-vibration concrete. These concretes eliminate the need for vibration in a placement process where the reinforcement makes proper vibration difficult or impossible.
Rapid-1 Hardening Accelerator Concrete Admixture, Purdue Ect Team
Rapid-1 Hardening Accelerator Concrete Admixture, Purdue Ect Team
ECT Fact Sheets Archive
SIKA Rapid-1 is a concrete admixture that allows the development of very early high strengths in concrete consisting of commonly used mix components. Unlike concrete set accelerators, it does not reduce set time or long-term strength, and it does not corrode steel reinforcing. This hardening accelerator allows placement of fresh concrete without early stiffening, followed by a period of very rapid strength gain after initial set.
Corrosion Inhibitors For Reinforced Concrete, Purdue Ect Team
Corrosion Inhibitors For Reinforced Concrete, Purdue Ect Team
ECT Fact Sheets Archive
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.
Automated Spray Pothole Patching Truck, Purdue Ect Team
Automated Spray Pothole Patching Truck, Purdue Ect Team
ECT Fact Sheets Archive
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.
Lateral Statnamic Testing, Purdue Ect Team
Lateral Statnamic Testing, Purdue Ect Team
ECT Fact Sheets Archive
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.
Encapco Emulsified Treated Base Product, Purdue Ect Team
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.
Dry Link Hose Coupling Assembly, Purdue Ect Team
Dry Link Hose Coupling Assembly, Purdue Ect Team
ECT Fact Sheets Archive
Conventional dry-disconnects routinely leak up to 15cc of process fluid after every transfer and require catch buckets and costly cleanups. The Dry Link System, by Victaulic, solves this problem by implementing a hose coupling assembly with a drip free design. This pipe connection technology is proving to be a highly versatile solution when there is a need to transfer volatile and/or toxic fluids through a series of hoses or pipes.
Realabor: Labor Management Software, Purdue Ect Team
Realabor: Labor Management Software, Purdue Ect Team
ECT Fact Sheets Archive
In the construction industry, many operations and processes are labor intensive. Efficient management of labor or human resources can be key in a successful construction project. REALabor is a real time labor cost and productivity tool designed for the daily interactive tracking of performance on the job site. REALabor is an electronic daily timesheet that displays all employees and all cost codes for a project on one sheet.
Acoustic Wave Sensors, Purdue Ect Team
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.
Pavemend - Ceracrete Rapid Repair Products, Purdue Ect Team
Pavemend - Ceracrete Rapid Repair Products, Purdue Ect Team
ECT Fact Sheets Archive
Repair of concrete continues to be a major maintenance item in the budget of many agencies. There are many circumstances in which a rapid repair is highly desirable. Ceracrete Technologies, Inc. (CTI) is a Richmond, Virginia-based small business. CTI focuses on the manufacture of commercial products for construction applications using non-hazardous inorganic recovered raw materials to replace conventional virgin raw materials. Ceracrete technology is a chemical bonding process that uses very high percentages of coal ash, municipal solid waste ash, foundry sand residue, dredge material, flue gas desulferization by-products, etc. to create rapid concrete repair products.
Prepacked Shotcrete Admixture : Spray-Con Ws, Purdue Ect Team
Prepacked Shotcrete Admixture : Spray-Con Ws, Purdue Ect Team
ECT Fact Sheets Archive
Over the past 10 years, the wet shotcrete method has become increasingly used in the repair of vertical and overhead concrete surfaces. The wet shotcrete admixture products, Spray-Con, are mixed on-site with locally supplied sand and Portland cement. Spray-Con's silica fume enhanced and fiber reinforced formulations make it easy to control air entertainment in shotcrete - an important requirement for freeze/thaw durability and salt-scaling resistance.
Soil-Stiffness Gauge For Soil Compaction Control, Purdue Ect Team
Soil-Stiffness Gauge For Soil Compaction Control, Purdue Ect Team
ECT Fact Sheets Archive
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 …
Fiber Optic Sensor : Monitoring Precast Beams, Purdue Ect Team
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.
Deep Mixing Method For Ground Improvement, Purdue Ect Team
Deep Mixing Method For Ground Improvement, Purdue Ect Team
ECT Fact Sheets Archive
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.
Precast Concrete Beam-To-Column Connection System, Purdue Ect Team
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.
Rapid In-Situ Load Testing, Purdue Ect Team
Rapid In-Situ Load Testing, Purdue Ect Team
ECT Fact Sheets Archive
Load tests and structural monitoring are used to gain information regarding the health and performance of an existing structure. Both are more representative than analytical approaches to evaluate the structure, especially when little is known about the structure's geometry and composition. Rapid in-situ load testing is intended to be much simpler and can be carried out in a fraction of the time and at a much lower cost. The testing procedure was originally developed at Center for Infrastructure Engineering Studies, University of Missouri-Rolla to offer a non-destructive yet conclusive demonstration of the performance of new construction techniques and technologies.
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 Archive
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).
Osterberg Load Cell, Purdue Ect Team
Osterberg Load Cell, Purdue Ect Team
ECT Fact Sheets Archive
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.
Mortarless Concrete Blocks, Purdue Ect Team
Mortarless Concrete Blocks, Purdue Ect Team
ECT Fact Sheets Archive
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.
Kwik-Kap Metal Roof Fastener Seals, Purdue Ect Team
Kwik-Kap Metal Roof Fastener Seals, Purdue Ect Team
ECT Fact Sheets Archive
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.
Autoclaved Aerated Concrete, Purdue Ect Team
Autoclaved Aerated Concrete, Purdue Ect Team
ECT Fact Sheets Archive
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.
Tru-Frame Steel Truss, Purdue Ect Team
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.
A Decision Support System For The Selection Of Imaging Technologies To Detect Undergraound Utilities: Imagtech, Purdue Ect Team
A Decision Support System For The Selection Of Imaging Technologies To Detect Undergraound Utilities: Imagtech, Purdue Ect Team
ECT Fact Sheets Archive
A wide variety of geophysical imaging technologies and different application conditions pose challenges in selecting appropriate imaging technologies for the successful identification of underground utilities. A prototype computer decision tool, named IMAGTECH, was developed to assist in selecting the most appropriate imaging technologies to locate underground utilities. This dialog based computer application in a Microsoft Windows environment is an output of the research “Imaging and Locating Buried Utilities” under the Joint Transportation Research Program (JTRP) at Purdue University, IN, funded by the Indiana Department of Transportation (INDOT).
Mmfx Microcomposite Steel (Mmfx2), Purdue Ect Team
Mmfx Microcomposite Steel (Mmfx2), Purdue Ect Team
ECT Fact Sheets Archive
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 Archive
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.
High Performance Steel, Purdue Ect Team
High Performance Steel, Purdue Ect Team
ECT Fact Sheets Archive
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.
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 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.
Friction Pendulum™ - Seismic Isolation Bearings, Purdue Ect Team
Friction Pendulum™ - Seismic Isolation Bearings, Purdue Ect Team
ECT Fact Sheets Archive
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.