Articles tagged with Reinforced Concrete
A team of researchers at Penn State developed a new design approach to reduce the cost of ultra-high-performance concrete (UHPC) by optimizing metallic fibers, which currently make up 70% of the material's price. The new design can help produce stronger and more environmentally friendly concrete while reducing costs.
Wavelogix, a concrete sensor manufacturer, has received a $500,000 grant from the National Science Foundation to refine and scale its Rebel concrete strength sensing system. The system enables faster, data-driven decisions through real-time concrete strength monitoring.
A team from UCO develops a 100% recycled paving block made from mollusk shells and mining waste, replacing natural aggregates and conventional cement. The block meets mechanical, durability, and safety criteria without using single natural material, contributing to circular economy and decarbonization in the construction sector.
Researchers found that concrete slab size is the worst offender in terms of carbon emissions, with changing this feature alone able to save large amounts of emissions. Optimize design decisions such as floor thickness, building materials, and construction culture to reduce pollution.
A new framework developed by researchers at KTH Royal Institute of Technology enables builders to reuse structural elements confidently, extending the lifespan of used concrete by 50-100 years. The study's findings show that reusing concrete is one of the most effective ways to cut emissions and reduce waste in construction.
Researchers at University of East London found that discarded seashells can be transformed into a low-carbon concrete ingredient, reducing carbon emissions by up to 36%. The study suggests a promising opportunity for industry to adopt sustainable cement alternatives.
Researchers have developed a synthetic lichen system that enables concrete to heal itself without external intervention. This innovation has far-reaching potential in reducing maintenance costs and extending the longevity of concrete infrastructure.
The study focuses on developing design provisions for using headed reinforcement in bridge structures, reducing construction time and costs. Full-scale experimental testing is underway at the Center for Infrastructure Renewal's High-Bay Laboratory.
The school will focus on methods to address structural safety and infrastructure resilience challenges in a climate change context. Key findings include the importance of increasing infrastructure resilience to reduce social wellbeing impacts.
The National Science Foundation has awarded Wavelogix a two-year, $999,910 Small Business Innovation Research (SBIR) Phase II grant. The funding will help the company develop a complete solution for scaling up production of its REBEL concrete strength sensors, enabling faster and data-driven decisions in construction engineering.
The new material resists cracking and avoids sudden failure, unlike conventional brittle cement-based counterparts. By manipulating the structure of the material itself, researchers achieve significant improvements in toughness without additional material.
Researchers at Rice University have discovered a graphene-derived material that can serve as a substitute for sand in concrete, offering a potential solution to the looming 'sand crisis.' The study found that the graphene-based concrete is 25% lighter but just as tough as conventional concrete.
A new study by the National Institute for Environmental Studies shows that current infrastructure deployment is insufficient to meet Paris Agreement targets, requiring a shift in how materials are used or consumed. The study estimates that feasible supply of steel and cement within a carbon budget will fall short of expected global dem...
Drexel University's 'BioFiber' technology uses living tissue systems to stabilize and heal damaged concrete. The system incorporates biomineralizing bacteria that can create a stone-like material to repair cracks in concrete, improving durability and reducing greenhouse gas emissions.
Researchers developed a fast and affordable test to predict cement durability using computer vision, which can analyze water droplet absorption on surfaces. The new test is less tedious than current methods and could help the cement industry improve quality control.
Researchers develop AI-based method to quantify cracking patterns in reinforced concrete structures, enabling more accurate and efficient assessments of structural damage. The approach uses graph theory and machine learning algorithms to create a unique 'fingerprint' for each set of cracks, allowing for quick and consistent evaluations.
Dresden researchers have identified textile-technological and physico-chemical methods to improve fiber-matrix interaction at different temperatures. These modifications aim to enhance load transfer between carbon fibers and cement-based matrices.
Researchers from the University of Tsukuba developed a reliable means to quantify reinforced concrete structure deterioration using crack width measurements. Increasing crack width leads to decreased bond strength in infrastructure.
Researchers found that Caltech Hall's natural frequencies have increased by 5% in the east-west direction and 2% in the north-south direction over 20 years. This suggests up to 20% variation in the building's stiffness between earthquakes, posing a challenge for seismic structural health monitoring.
A new study concludes that net zero carbon emissions in the concrete industry need both supply-side and demand-side strategies. Changes in purchasing habits and infrastructure design can reduce concrete consumption, promoting recycling, reuse, and material efficiency.
Using denitrifying bacteria in recycled coarse aggregate concrete increases its strength and durability, reducing water absorption by 33% and improving compressive strength by 30.3%. The novel method offers an environmentally friendly solution to enhance freeze-thaw resistance.
Researchers advocate for a paradigm shift in forecasting corrosion damage within reinforced concrete structures, citing the flaws of using a single theoretical concept. A multiscale, multidisciplinary approach is needed to quantify corrosion rates and develop reliable forecast models.
Researchers at Shibaura Institute of Technology develop a fast and reliable method to detect defects in concrete structures using laser-induced plasma shock waves. The technique analyzes vibration patterns to identify Rayleigh waves, which can reveal the presence of cracks.
Engineers developed a computational modeling strategy to simulate restoration strategies for reinforced concrete columns. The models predict the effects of repair methods on column strength and ductility before and after repair.
A 13-year-long study finds that fiber-reinforced polymer (FRP) coatings can sustain concrete structures for extended periods. The study tested FRP and glass fiber reinforced polymer (GFRP) systems under various environmental conditions, revealing significant impact on bond behavior.
A University of Missouri researcher is using a grant from the National Science Foundation to explore how time can factor in a building collapse. She's conducting thousands of hours of laboratory tests to determine the breaking points of reinforced concrete building materials.
Scientists warn that seismic guidelines in Canada's national building code may be inadequate for Metro Vancouver's unique geological conditions, particularly the Georgia sedimentary basin. This could put taller, older buildings at greater risk during a magnitude-9 Cascadia earthquake.
Researchers from the University of Córdoba study found that carbonation and chlorides are two primary agents causing steel corrosion. The study cataloged parameters with varying degrees of influence, highlighting areas for future research to combat this issue.
A recent study suggests that reinforced concrete walls in Seattle may experience up to 11% larger displacement and a higher probability of collapse during magnitude 9 earthquakes due to basin effects. The research highlights the need for updated building codes and retrofits to mitigate potential damage.
The DFG is funding 12 projects to develop new instrumentation technologies for basic research. A new X-ray system will be built at the Technical University of Kaiserslautern, enabling researchers to analyze reinforced concrete components in unprecedented detail.
The study found that increasing beam section height and lower steel bar rebar ratio significantly improves collapse-resistance capacity. Meanwhile, lengthening the specially shaped column limb only enhances stiffness, while slab upper and lower steel bar rebar ratios increase the frame's stiffness and collapse-resistance capacity.
The Controlled Impact Rescue Tool (CIRT) rapidly rescues those trapped beneath concrete by creating a contained hole with high-energy jolts, making it up to four times faster than traditional methods. CIRT units have been distributed to various search-and-rescue teams across the US.
Thomas Hsu, a University of Houston civil engineering professor, has been recognized for his work on the 'Universal Element Tester,' a device capable of testing reinforced concrete under varied controlled forces. The UET allows engineers to predict seismic behavior and design cost-effective structures.