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Showing 1 to 20 of 38 for “"Ultra-High Performance Concrete (UHPC)"”.
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Evaluation of Elastic-Plastic and Damage Models for Ultra High Performance Concrete (UHPC)
<p>Ultra-high performance concrete (UHPC) has been developed in recent decades as a new class of concrete which exhibits increased strength, durability and long-term stability when compared with normal strength concrete (NSC) and high performance concrete (HPC). While extensive research has …
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Optimization of Highway Bridge Girders for Use with Ultra-High Performance Concrete (UHPC)
Ultra High Performance Concrete (UHPC) is a class of cementitious materials that share similar characteristics including very large compressive strengths, tensile strength greater than conventional concrete and high durability. The material consists of finely graded cementitious particles and …
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Fracture toughness of ultra high performance concrete
In this study, fracture properties of Ultra-High Performance Concrete (UHPC), and High Performance Concrete (HPC) are presented. The average compressive strengths of UHPC and HPC used in the tests were 141 MPa, and 55 MPa respectively. Formulation and processing of the mixes and test specimens are …
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Development and optimization of ultra-high performance concrete using local materials
… bridge construction, a material known as ultra-high performance concrete (UHPC) is often used to join structural elements of the bridge together. While the material performs well in accelerated conditions, more widespread adoption of UHPC is often hindered by its high price and the …
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Recommendations for the design of ultra-high performance concrete structures
… manufacture and installation. DUCTAL, a new ultra-high performance concrete (UHPC) with enhanced tensile, compressive, and deflective behavior offered by LaFarge, is one such material, and current guidelines for concrete do not sufficiently account for these improved properties. Research by …
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Multiscale Computational Framework for Analysis and Design of Ultra-High Performance Concrete Structural Components and Systems
… components and systems constructed with Ultra-High Performance Concrete (UHPC). The modeling strategy utilizes the Lattice Discrete Particle Model (LDPM) to represent UHPC material and structural member response, and extends a structural-level triaxial continuum constitutive law to …
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Numerical Modeling of UHPC using a Concrete Damage Plasticity Model
Ultra-High Performance Concrete (UHPC) is a type of concrete that is known for its high compressive strength, elastic-plastic or strain hardening tensile behavior, and enhanced material ductility and toughness. These properties are achieved through the use of a low water-to-binder ratio, optimized …
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Design of wind turbines with Ultra-High Performance Concrete
Ultra-High Performance Concrete (UHPC) has proven an asset for bridge design as it significantly reduces costs. However, UHPC has not been applied yet to wind turbine technology. Design codes do not propose any recommendations or guidance for the towers, thus encouraging the engineer to use less …
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VHPC Material Characterization and Recommendations for the Buffalo Branch Bridge Rehabilitation
… deteriorating and debonding from the precast concrete in the shear key, reflective cracking propogates through the deck allowing water and chemicals to leak down into the joints. This can lead to the prestressing steel inside the precast member and the transverse tie steel corroding. This …
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Investigation of Ultra-High Performance Concrete for Longitudinal Joints in Deck Bulb Tee Bridge Girders
… recent decades, many state DOTs have implemented ultra-high performance concrete (UHPC) in bridge construction because of its advanced mechanical properties beyond those of conventional concrete. The Federal Highway Administration (FHWA) has extensively tested a proprietary class of UHPC, but …
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Prediction of early-age cracking of UHPC materials and structures : a thremo-chemo-mechanics approach
Ultra-High Performance Concrete [UHPC] has remarkable performance in mechanical properties, ductility, economical benefit, etc., but early-age cracking of UHPC can become an issue during the manufacturing process due to the high cement content and the highly exothermic hydration reaction. Because …
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Single Straight Steel Fiber Pullout Characterization in Ultra-High Performance Concrete
… single straight steel fiber pullout in Ultra-High Performance Concrete (UHPC). Several parameters were explored including the distance of fibers to the edge of specimen, distance between fibers, and fiber volume in the matrix. The pullout load versus slip curve was recorded, from which …
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Design and performance of cost-effective ultra-high performance concrete for prefabricated elements
… a mixture design methodology for cost-effective ultra-high-performance concrete (UHPC) incorporating high volume of supplementary cementitious materials and conventional concrete and masonry sands; (2) developed UHPC with adapted rheology incorporating lightweight sand, hybrid fibers, and …
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Design and performance of cost-effective ultra high performance concrete for bridge deck overlays
… of this research is to develop a cost-effective ultra-high performance concrete (UHPC) for bonded bridge deck overlays. The high durability and mechanical properties of such repair material can offer shorter traffic closures and prolong the service life of the pavement. The UHPC was optimized …
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DESIGN AND PERFORMANCE OF SELF-CONSOLIDATING AND THIXOTROPIC ULTRA-HIGH-PERFORMANCE CONCRETE FOR INFRASTRUCTURE CONSTRUCTION AND REHABILITATION
… of this research is to develop two classes of ultra-high-performance concrete (UHPC), one with self-consolidating consistency and the other with improved thixotropy. Tailoring the rheological properties of low yield stress UHPC can improve dispersion and orientation of steel fibers used in the …
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Investigation of fiber and cracking behavior for conventional and ultra-high performance concretes using x-ray computed tomography
To make significant advances in concrete engineering, understanding the behavior of cementitious materials at the micro-scale will be necessary. To reach this goal, the location and orientation of constituent materials within concrete members, as well as the nature of damage initiation and growth, …
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Investigation of UHPC Columns for Stress-Strain Behaviour, Economic and Environmental Feasibility
Ultra High Performance Concrete (UHPC) also known as Reactive Powder Concrete (RPC) was developed by in France circa 1995 (Richard & Cheyrezy, 1995). The most notable characteristics of RPC are its mechanical properties, which are an “ultra high” compressive strength (𝑓′𝑐 ≥ 150 𝑀𝑃𝑎), a high …
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Ultra-High Performance Concrete Shear Walls in Tall Buildings
… an effort to quantify the implications of using ultra-high performance concrete (UHPC) for shear walls in tall buildings considering structural efficiency and environmental sustainability. The Lattice Discrete Particle Model (LDPM) was used to simulate the response to failure of concrete shear …
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A New CFRP-UHPC System for Strengthening Reinforced Concrete T-Beams
… construction field, strengthening of reinforced concrete beams using FRP laminates became a common repair and retrofit technique. Traditionally, Reinforced Concrete (RC) beams are strengthened by adhering FRP laminates to the tension side of the beam to work as an additional tensile …
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