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 1 - 30 of 187
Full-Text Articles in Engineering
Alternative Material Dowel Bars For Rigid Pavement Joints, Purdue Ect Team
Alternative Material Dowel Bars For Rigid Pavement Joints, Purdue Ect Team
ECT Fact Sheets
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 …
Snap-Tite Composite Column Reinforcement, Purdue Ect Team
Snap-Tite Composite Column Reinforcement, Purdue Ect Team
ECT Fact Sheets
Recent earthquakes throughout the world have demonstrated the vulnerabilities of older reinforced concrete columns to seismic deformation demands. The Snap Tite Composite Column Reinforcement strengthens a concrete column by confining it in an external composite jacket, which prevents the concrete from expanding during seismic activity or prolonged freeze-thaw cycles. The pre-manufactured fiberglass jacket is comprised of glass fibers and corrosion resistant isopolyester resins.
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
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 …
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
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, …
Superpave System, Purdue Ect Team
Superpave System, Purdue Ect Team
ECT Fact Sheets
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.
Atlss Integrated Building System, Purdue Ect Team
Atlss Integrated Building System, Purdue Ect Team
ECT Fact Sheets
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.
Simcon: Slurry Infiltrated Mat Concrete, Purdue Ect Team
Simcon: Slurry Infiltrated Mat Concrete, Purdue Ect Team
ECT Fact Sheets
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 …
Snap Joint Technology For Composite Structures, Purdue Ect Team
Snap Joint Technology For Composite Structures, Purdue Ect Team
ECT Fact Sheets
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 …
Ultrascreen - Sight And Sound Barrier Partition Walls, Purdue Ect Team
Ultrascreen - Sight And Sound Barrier Partition Walls, Purdue Ect Team
ECT Fact Sheets
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.
Substiwood™ - Concrete Lumber, Purdue Ect Team
Substiwood™ - Concrete Lumber, Purdue Ect Team
ECT Fact Sheets
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.
Frp Rebar (Afrp, Cfrp, Gfrp), Purdue Ect Team
Frp Rebar (Afrp, Cfrp, Gfrp), Purdue Ect Team
ECT Fact Sheets
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.
Pavemend - Ceracrete Rapid Repair Products, Purdue Ect Team
Pavemend - Ceracrete Rapid Repair Products, Purdue Ect Team
ECT Fact Sheets
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.
Steel-Free Concrete Bridge Deck, Purdue Ect Team
Steel-Free Concrete Bridge Deck, Purdue Ect Team
ECT Fact Sheets
Eliminating corrosion makes concrete deck slabs virtually maintenance-free, which makes life cycle costs of steel-free concrete decks much lower than reinforced concrete decks. In response, compressive membrane forces develop in the concrete deck. Ultimate load can be greater than the load at which the same deck would fail if it were reinforced conventionally.
Pothole Repairing Compound : Bondade Tcu-31, Purdue Ect Team
Pothole Repairing Compound : Bondade Tcu-31, Purdue Ect Team
ECT Fact Sheets
Conventional asphalt-based tacking materials such as hot asphalt-cement, cutbacks or emulsions cannot be applied without specialized spraying and heating equipment. With current methods of repair, nearly half of the potholes filled today will fail within six months. Bondade uses readily available spraying equipment to wet the surface and develop a tenacious bond between the asphalt and the existing substrate. It is an environmentally safe and non-hazardous material that may be used with hot or cold asphalt concrete, under damp or dry conditions and on nearly all surfaces.
Use Of Composite Piping Offshore, Purdue Ect Team
Use Of Composite Piping Offshore, Purdue Ect Team
ECT Fact Sheets
The high cost to replace steel piping in retrofit applications and increased longevity in new construction is driving the search for composite materials which are able to withstand the severe conditions experienced by offshore facilities. Advantages of composite piping compared to steel piping are: inherent corrosion resistance, lighter weight, ease of fabrication, lower maintenance costs, and lower life cycle costs.
Precast Inverted T Beam, Purdue Ect Team
Precast Inverted T Beam, Purdue Ect Team
ECT Fact Sheets
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.
Italgrip System, Purdue Ect Team
Italgrip System, Purdue Ect Team
ECT Fact Sheets
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.
New Structural Material - Fiber Reinforced Plastics, Purdue Ect Team
New Structural Material - Fiber Reinforced Plastics, Purdue Ect Team
ECT Fact Sheets
Traditional structural materials are heavy and require a great deal of maintenance. If a new breed of structural material could be produced that was lighter, stronger and more resistant to corrosion, impacts, parasites and chemicals, it could be a good substitute for steel, concrete, masonry and wood. One new material that has the potential to meet these demands is starting to show up on the construction industry market, it is Fiber Reinforced Plastics (FRP). Some technologies that have been developed using FRP materials within the last few years are: structural shapes, concrete reinforcing, prestressing and post-tensioning tendons and pre-engineered structural …
Surtreat - Concrete Restoration & Protection System, Purdue Ect Team
Surtreat - Concrete Restoration & Protection System, Purdue Ect Team
ECT Fact Sheets
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.
Rapid-1 Hardening Accelerator Concrete Admixture, Purdue Ect Team
Rapid-1 Hardening Accelerator Concrete Admixture, Purdue Ect Team
ECT Fact Sheets
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.
Carbon Fiber Reinforced Polymer (Cfrp) Laminates For Structural Strengthening, Purdue Ect Team
Carbon Fiber Reinforced Polymer (Cfrp) Laminates For Structural Strengthening, Purdue Ect Team
ECT Fact Sheets
Strengthening measures are required in structures when they are required to accommodate increased loads. Also, when there are changes in the use of structures, individual supports and walls may need to be removed. The pultruded CFRP laminate reinforcing consists of bonding the CFRP strip with the concrete structure using a high-strength epoxy resin as the adhesive. The CFRP strips are manufactured using a pultrusion process. The pultrusion principle is comparable with a continuous press. It provides great strength, high modulus of elasticity, and outstanding fatigue resistance It is a very lightweight non-corrosive material, that requires minimal preparation of laminates, and …
Use Of Recycled Tire Rubber In Concrete, Purdue Ect Team
Use Of Recycled Tire Rubber In Concrete, Purdue Ect Team
ECT Fact Sheets
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 …
Smart Concrete, Purdue Ect Team
Smart Concrete, Purdue Ect Team
ECT Fact Sheets
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.
Rapid In-Situ Load Testing, Purdue Ect Team
Rapid In-Situ Load Testing, Purdue Ect Team
ECT Fact Sheets
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.
Prepacked Shotcrete Admixture : Spray-Con Ws, Purdue Ect Team
Prepacked Shotcrete Admixture : Spray-Con Ws, Purdue Ect Team
ECT Fact Sheets
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.
Reactive Powder Concrete, Purdue Ect Team
Reactive Powder Concrete, Purdue Ect Team
ECT Fact Sheets
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.
Shrinkage Reducing Admixture For Concrete, Purdue Ect Team
Shrinkage Reducing Admixture For Concrete, Purdue Ect Team
ECT Fact Sheets
Concrete shrinkage cracking is a common problem in all types of concrete structures, especially for structures and environments where the cracks are prevalent and the repercussions are most severe. A liquid shrinkage reducing admixture for concrete, developed by GRACE Construction Products and ARCO Chemical Company, that reduces significantly the shrinkage during concrete drying and potentially reduces overall cracking over time.
Mellose Non-Dispersible Underwater Concrete Admixture, Purdue Ect Team
Mellose Non-Dispersible Underwater Concrete Admixture, Purdue Ect Team
ECT Fact Sheets
Mellose is a viscose agent based on under water Cellulose (Hydroxy Propyl Methyl Cellulose). It is commonly referred to as a a self-leveling agent that increases viscosity when is dissolved in water. It can be also described as an anti-washout concrete or non-dispersible concrete mixture. Mellose is an essential component of high performance concrete construction under water.
Self-Placing Concrete, Purdue Ect Team
Self-Placing Concrete, Purdue Ect Team
ECT Fact Sheets
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.
High Performance Concrete (Hpc), Purdue Ect Team
High Performance Concrete (Hpc), Purdue Ect Team
ECT Fact Sheets
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.