KU researchers explore FRP materials for dams, levee reinforcement

 

To address aging infrastructure, a team of researchers at KU is conducting research into repairing and retrofitting 700-plus dams, levees and related structures nationwide using FRP materials.

University of Kansas School of Engineering (Lawrence, Kan., U.S.) researchers are partnering with U.S. federal agencies in efforts to reinforce dams and levees across the U.S. using fiber-reinforced polymers, sensors, artificial intelligence and drones.

The five-year, $7.7 million project is a partnership between KU, the U.S. Army Engineer Research and Development Center (ERDC), the Department of Homeland Security’s Science and Technology Directorate and the U.S. Army Corps of Engineers (USACE).

The KU team of researchers is led by Caroline Bennett, Dean R. and Florence W. Frisbie Associate Chair of Graduate Studies, Glenn L. Parker Faculty Fellow and professor of civil, environmental and architectural engineering.

“The project focuses on developing repairs and retrofits for the inventory of concrete dams in the U.S., with an emphasis on efficient damage detection,” Bennett says. “In addition to repair methods, we’ll be using fiber-reinforced polymer materials, or FRPs, to address damage. Specifically, we’re targeting sliding at lift joints, restraining rocking between crest block and dam body during seismic loading, and damage on concrete spillways of dams. Our goal is to extend the usable lives of existing concrete dam infrastructure, which was mostly built in the 1930s and 1940s.”

Several of the dams and levees from this era have experienced catastrophic failures in recent years due to disrepair. A recent assessment concluded the nation’s dams and levees require $93.6 billion in upgrades to many of the 700-plus dams and related structures the USACE operates and maintains.

KU researchers are exploring new, safer approaches for assessing dam and levee damage, which traditionally required manual inspection. The team’s approach will rely on artificial intelligence, according to co-primary investigator Jian Li, Francis M. Thomas Chair’s Council associate professor of civil, environmental and architectural engineering at KU.

“My main role is focused on using deep learning and computer vision to autonomously identify the location and severity of dam damage, such as concrete cracking and spalling, for which FRP repair is needed,” Li explains. “Once the repair is done, these locations are no longer inspectable. Therefore, we’ll also develop self-sensing FRP repairs to enable continued monitoring of the repaired regions to ensure long-term safety. By leveraging emerging technologies including artificial intelligence, computer vision and advanced sensing, our research will greatly enhance timely repair, retrofit and maintenance of the nation’s large inventory of concrete dams.” 

In the meantime, work is underway by KU faculty, postdoctoral researchers, graduate students and undergraduate research assistants to identify fiber-reinforced polymer materials for use in concrete gravity dam applications. Materials characterization and large-scale testing is being performed at three different KU laboratories: the West Campus Structural Testing Facility, the Learned Hall Structural Engineering Testing Laboratory and the Lutz Fracture and Fatigue Laboratory. 

Rémy Lequesne, associate professor of civil, environmental and architectural engineering, says, “We’re developing more efficient methods for dam inspection and, through data collection and model development, providing tools that engineers can use to make decisions about whether and how to repair existing dams.”

Lequesne will oversee experimental testing of simulated joints in concrete dams, both with and without repairs. “Results will lead to recommendations and new modeling tools that engineers can use for assessment and design of repairs,” he says.

In addition, KU researchers will conduct a review of all research into FRP materials, with a particular interest in carbon-fiber-reinforced materials, to inform the project. 

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13th International Conference on Fiber Reinforced Polymer 20-21June 2024- Dubai, United Arab Emirates

 

Fiberreinforced Polymer conferences organized by ScienceFather group. ScienceFather takes the privilege to invite speakers, participants, students, delegates, and exhibitors from across the globe to its International Conference on Fiberreinforced Polymer conferences to be held in the Various Beautiful cites of the world.

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Materials & Processes: Fibers for composites

 The structural properties of composite materials are derived primarily from the fiber reinforcement. Fiber types, their manufacture, their uses and the end-market applications in which they find most use are described.

• WIND/ENERGY
• SUSTAINABILITY
• AUTOMOTIVE
• DEFENSE
• CARBON FIBERS
• BIOMATERIALS
• OUT OF AUTOCLAVE
• MARKET OUTLOOK
• MATERIALS
• GLASS FIBERS
• FABRICS/PREFORMS
• PRESSURE VESSELS
• WEAVING
• INFRASTRUCTURE
• CONSUMER
• AEROSPACE
• NATURAL FIBERS
• MASS TRANSIT
• REINFORCEMENTS
• MARKETS
• MARINE
• CONSTRUCTION
• COMPOSITES BASICS
• FRP REBAR

The structural properties of composite materials are derived primarily from the fiber reinforcement. In a composite, the fiber, held in place by the matrix resin, contributes tensile strength, enhancing performance properties in the final part, such as strength and stiffness, while minimizing weight. Fiber properties are determined by the fiber manufacturing process and the ingredients and coating chemistries used in the process.

Glass fibers

The majority of all fibers used in the composites industry are glass. Glass fibers are the oldest and, by far, the most common reinforcement in most end-market applications (the aerospace industry is a significant exception) to replace heavier metal parts. Glass fiber weighs more than the second most common reinforcement, carbon fiber, and is not as stiff, but is more impact-resistant and has a greater elongation-to-break (that is, it elongates to a greater degree before it breaks). Depending upon the glass type, filament diameter, coating chemistry (called “sizing,” see “Critical fiber sizing," below) and fiber form, a wide range of properties and performance levels can be achieved.

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13th International Research Awards on Fiberreinforced Polymer 20-21June 2024- Dubai, United Arab Emirates

 

13th International Research Awards on Fiberreinforced Polymer 20-21June ...

Bio-based Construction Polymer Market Builds Sustainable Growth, Offering Opportunities and Eco-Friendly Solutions for Construction Industry 2024-2032

The Bio-based Construction Polymer Market is poised for growth as sustainable building materials gain traction in the construction industry. With properties comparable to traditional polymers but lower environmental impact, bio-based polymers offer a compelling solution for eco-conscious builders and developers.

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Moreover, these polymers offer comparable performance properties such as durability, strength, and thermal insulation while reducing carbon footprint and dependence on fossil fuels. Additionally, technological advancements in polymer synthesis and processing techniques further drive market growth.

As the construction industry embraces sustainable practices and green building standards, the Bio-based Construction Polymer market is poised for continued expansion and innovation to meet the growing demand for environmentally friendly materials.

The Worldwide Bio-based Construction Polymer Market is Expected to Grow at a Booming CAGR of 11.71% During 2024-2032.

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With increasing emphasis on reducing carbon emissions and minimizing environmental impact, bio-based construction polymers will gain traction as alternatives to traditional petroleum-based materials.

Future developments may include bio-based polymers with superior mechanical properties, fire resistance, and durability, meeting or exceeding the performance of conventional materials. Moreover, advancements in bio-refining technologies and waste valorization will enable the production of bio-based polymers from renewable resources and agricultural by-products.

Additionally, the adoption of circular economy principles will drive the recycling and reuse of bio-based construction polymers, further reducing their environmental footprint. As the construction industry transitions towards more sustainable practices, the Bio-based Construction Polymer market is poised for significant growth and innovation in the future.

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Moreover, these polymers offer comparable performance properties such as durability, strength, and thermal insulation while reducing carbon footprint and dependence on fossil fuels. Additionally, technological advancements in polymer synthesis and processing techniques further drive market growth.

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This report analyzes the key opportunities in the Bio-based Construction Polymer market and identifies the factors that are driving the growth of the industry and will continue to grow in the future. Consider past development designs, development drivers, trends and future patterns.

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Owens Corning initiates review of strategic alternatives for glass fiber business

 

The decision to explore alternatives for the GR business is consistent with the company’s strategy to focus on building and construction materials. A range of options are under consideration, including a potential sale, spin-off or other strategic option.

The business, which operates within the company’s Composites segment, manufactures, fabricates and sells glass fiber reinforcements in a variety of product forms. The GR business generates annual revenues of approximately $1.3 billion and has operations in 11 countries, with 18 manufacturing facilities. It supplies a wide variety of glass fiber products for applications in wind energy, infrastructure, industrial, transportation and consumer markets.

Owens Corning’s vertically integrated glass nonwovens business that supports the Roofing segment and other building products customers, along with the recently acquired WearDeck business, remain core activities of the company and are out of the scope of this evaluation.

“Our board and management team regularly review strategic opportunities with a goal to maximize shareholder value,” Brian Chambers, board chair and CEO of Owens Corning, says. “Through this disciplined approach to capital allocation, we have taken actions over the past several years to optimize our performance and have concluded it is the right time to explore options for our glass [fiber] reinforcements business as we continue to focus on strengthening our position in building and construction materials.”

Chambers adds that, throughout the company’s review, Owens Corning is committed to maintaining a strong customer relationships with the same high standards and close collaboration.

The company has retained Morgan Stanley & Co. LLC as financial advisor to assist in the review of strategic alternatives. There can be no assurance that the strategic review will result in any transaction or other outcome. 

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