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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"Conventional concrete"”.
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Seismic Performance of Self-Consolidating Concrete Bridge Columns
… the seismic performance of self-consolidating concrete (SCC) bridge columns. This study included literature review, experimental evaluation of concrete mixtures, experimental testing of reinforced concrete bridge columns under combined axial loading and lateral load reversals, and analytical …
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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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Mitigating alkali silica reaction in recycled concrete
<p>Concrete made with recycled concrete aggregate (RCA) that had shown alkali silica reaction (ASR) distress was evaluated. It was found that ASR mitigation was needed to prevent continued expansion. Several mitigation methods were evaluated and compared to conventional concrete using the testing …
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Transfer Length, Development Length, Flexural Strength, and Prestress Loss Evaluation in Pretensioned Self-Consolidating Concrete Members
… determine the effect of using self-consolidating concrete versus normal concrete on transfer and development lengths, and flexural strengths of prestressed members. Three small rectangular members were made, two cast with SCC mixes and one cast with a conventional mix, to determine the transfer …
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Development and Structural Performance Assessment of Low-Carbon Concrete Using Recycled Concrete Aggregates and Secondary Materials
… the structural performance of low carbon concrete (LCC) developed with various proportions of recycled concrete aggregates (RCA) and supplementary cementitious materials (SCMs) as sustainable material alternatives to conventional concrete materials. Extensive materials testing and analysis …
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Investigation of Ultra-High Performance Concrete for Longitudinal Joints in Deck Bulb Tee Bridge Girders
… 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 WSDOT has been hesitant to …
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Influencia de la dosificación y empleo de diferentes tipos de cemento y adiciones en las propiedades mecánicas del hormigón autocompactante
… of the mechanical properties of self compacting concrete, both in a more general form and in terms of the cement type and the type of additions used in the mixtures. In addition, the applicability of the estimating models used to calculate the mechanical properties of conventional concrete, to …
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Attainable Compressive Strength Of Pervious Concrete Paving Systems
The pervious concrete system and its corresponding strength are as important as its permeability characteristics. The strength of the system not only relies on the compressive strength of the pervious concrete but also on the strength of the soil beneath it for support. Previous studies indicate …
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Characterizing the Shear Behavior of Ultra-High-Performance Concrete through the Universal Panel Tester
… of the shear behavior of Ultra-High-Performance Concrete (UHPC), especially under the effects of axial loads and varying scales, poses challenges to the formulation of reliable design models. Although UHPC is being utilized in structural applications, its complex behavior under combined stress …
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The use of aggregate from demolition rubble in the making of ordinary and structural concretes
… to introduce the concept of recycling demolished concrete as aggregate which is then used in fresh concrete - to be known as "recycled concrete". Various aspects of concrete technology are covered and in this way recycled concrete is compared to conventional concrete. The work was performed in …
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Self-Compacting Concrete for Prestressed Bridge Girders
Self-consolidating concrete (SCC), which is different from conventional concrete especially in its fresh state, is a highly workable concrete that flows through congested reinforcement under its own weight alone, filling the formwork without segregation of its constituent materials with a void-free …
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Evaluation of structural systems for mass timber buildings in low to moderate seismic regions
… efficiencies and tradeoffs of replacing conventional concrete cores with mass timber braced frames and steel-timber hybrid frames. The lateral resistance of prototype configurations is evaluated through numerical analyses to understand in more detail the characteristics of an efficient …
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Seismic Design Manual for Interlocking Compressed Earth Blocks
… placed. While ICEB construction is similar to conventional masonry construction, current design code standards for masonry only partially capture the actual behavior of ICEB structures. This thesis seeks to supplement the existing masonry design procedures and tailor them for use with …
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Seismic Behavior of Simcon-Jacketed High Strength Lightweight Aggregate Fiber Reinforced Concrete Filled Steel Tube Column Members
… such as High-Performance Fiber Reinforced Concretes (HPFRCs) have been developed. These innovative composite materials exhibit behavior not attainable with conventional concrete materials, such as high compressive and tensile strength, as well as ductility, which lead to a significant …
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Current technologies and trends of aluminum design
… and bridge retrofitting projects. By replacing conventional concrete decks of a bridge with aluminum decks, not only is the dead load red load capacity of the bridge is increased. However, there are design issues related with aluminum construction that must be carefully considered. Issues such …
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The behaviour of steel fibre reinforced concrete material and its effect on impact resistance of slabs
Concrete structures are usually subjected to both static as a long term and dynamic as a short term loads. The impact resistance of plain concrete is low and that’s mainly due to a fairly low energy dissipating features and inadequate tensile strength. To compensate for the weak tensile properties …
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Programmable Mud: 3D Printing earth to achieve low-carbon, low-cost construction automation
… a hybrid floor system combining shape-optimized concrete beams with 3D-printed ceramic blocks, (3) zero-waste earthen formwork for reinforced concrete, and (4) thermally optimized wall systems for passive climate control. Life cycle assessment reveals that 3D-printed earth structures have …
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Performance of Steel Fiber-Reinforced Concrete Beams Under Shock Tube Induced Blast Loading
… and static behavior of steel fiber-reinforced concrete (SRFC) beams. As part of this study a total of eighteen (18) beams are tested, including fourteen (14) SFRC beams, and a companion set of four (4) beams built without fibers. Seven (7) of the beams are tested under quasi-static (slowly …
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Design and performance of cost-effective ultra-high performance concrete for prefabricated elements
… 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 nanomaterials with improved …
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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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