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214 results for “concrete”
NCCD-PF - A pre-failure narrow concrete cracks dataset for engineering structures damage classification and semantic segmentation
<p>The NCCD-PF dataset was developed for the classification and semantic segmentation of narrow concrete cracks in engineering structures elements at the pre-failure state. It only includes cracks whose width is narrower than 0.3 mm, i.e. the limit value specified in EC 1992-1-1 for typical elements of engineering structures and environmental conditions.</p> <p>This dataset is dedicated to the early crack detection at a stage when the serviceability limit state has not yet been exceeded and the failure of a structural element has not occurred. By implementing the early crack detection approach, it is possible to protect cracks in order to stop or slow down their propagation and thus to extend the structure's lifespan.</p> <p>This dataset contains images of cracks appearing on various elements of engineering structures (bridges, viaducts, tunnels) made of reinforced concrete (including abutments, tunnel walls, concrete barriers, pillars). The images were captured on construction sites and during inspections of engineering structures, at different stages of the reinforced concrete structure's working conditions - from the construction stage (when the elements are loaded only by their own weight) to the structure's use stage (when the elements are loaded by most of the design loads). The images are also differentiated by the cause of the cracking (ex., thermal and shrinkage stresses in young concrete, excessive stresses). The images were acquired using fixed-focus cameras without prior conditioning in order to represent the real working conditions of a bridge engineer during structural inspections. The images are characterised by a high degree of complexity due to the quality of the concrete surface finish (e.g. presence of formwork marks, concrete trowel marks), which could potentially be recognised as cracks.</p> <p>This dataset is dedicated to researchers working in the fields of computer vision, machine learning and deep learning. In particular, it contains domain knowledge in structural health monitoring, so that it can support the work of engineers in detecting cracks of concrete elements in a pre-failure state.</p> <p>A detailed description of the dataset is presented in <a href="https://www.nature.com/articles/s41597-023-02839-z" target="_blank" rel="noopener">A pre-failure narrow concrete cracks dataset for engineering structures damage classification and segmentation</a> (DOI: 10.1038/s41597-023-02839-z).</p>
Concrete habitat: Impervious surface and avian fitness decline in two urban adapters
Open the record for dataset details and reuse information.
Data Accompanying "Fracturing process of concrete under uniaxial and triaxial compression: insights from in-situ x-ray mechanical tests"
<p>These are the datasets analysed in "Fracturing process of concrete under uniaxial and triaxial compression: insights from <em>in-situ</em> x-ray mechanical tests" by Stamati <em>et. al.</em> (submitted on June 2020 in Cement and Concrete Research)</p> <p>The datasets contain the reconstructed x-ray 3D images of selected tests and the corresponding DVC analysis.</p> <p>Note that details regarding the DVC analysis can be found in the paper.</p> <ul> <li>Each folder contains a separate test; uniaxial compression ("<em>C-02"</em>) and triaxial compression at 5MPa ("<em>TX5-01"</em>), 10MPa ("T<em>X10-01</em>") and 15MPa ("<em>TX15-01</em>") confining pressures.</li> <li>For each test, folder 01 contains the first scan, where 01 is the reference state for the DVC analyis. Folder 01 also contains the image of the labelled largest aggregates used for the discrete DVC. Folrders 02-XX contain the scans at intermediate loading steps and the corresponding DVC analysis; "<em>reg</em>" contains the registration result in downscaled 2-binning images. "<em>ddic</em>" contains the discrete DVC computation. "<em>ldic</em>" contains the local DVC computation, before and after the merge and filtering of the grid and discrete DVC fields. "<em>strains</em>" contains the strain fields coming from the corrected merged DVC field.</li> <li>Folder "<em>stressStrain</em>" contains the stress-strain curves measured during the tests after subtracting the displacement corresponding to the loading system.</li> <li>Folder "<em>doubleScanUniaxial</em>" contains the two reconstructed images of the "repeated scan" of the uniaxial tests, from which the DVC measurement uncertainties were evaluated.</li> </ul>
Raw data and supplementary material of the fifth inter-laboratory testing program (RRT5, self-healing concrete with macrocapsules) of the EU COST action SARCOS
<p>This data is the result of a collaboration of scientists working on the development of self-healing concrete within the framework of the European Cooperation in Science and Technology (COST) Action “Self-healing as preventive repair of concrete structures” SARCOS CA15202.</p> <p>In the framework of SARCOS 6 inter-laboratory testing programs are being executed to investigate possible standard test methods for self-healing concrete, each of the testing programs focusing on a different self-healing technique:<br> (1) Concrete with mineral additions,<br> (2) Concrete with the addition of magnesium oxide,<br> (3) Concrete enhanced with crystalline admixtures,<br> (4) High performance fibre reinforced concrete enhanced with crystalline admixtures,<br> (5) Concrete with preplaced macrocapsules containing polymeric healing agent, and<br> (6) Concrete with encapsulated bacteria.</p> <p>The data which can be found here have been obtained in the inter-laboratory testing program 5 "Concrete with preplaced macrocapsules containing polymeric healing agent". In total 6 labs participated in this testing program: Ghent University, Politecnico di Torino, Riga Technical University, Cracow University of Technology, Cambridge University, and KU Leuven (Ghent Technology Campus). All specimens were cast at Ghent University and were then distributed to the different labs, where they were tested.</p> <p>The testing program consisted of tests on both concrete and mortar specimens. The reinforced concrete specimens were cracked in a displacement-controlled three-point bending setup. Subsequently, they were subjected to two capillary water absorption tests, each with a different waterproofing technique. The mortar specimens were not reinforced, instead they were provided with a Carbon Fibre Reinforced Polymer (CFRP) laminate at the top. They were cracked in a force-controlled three-point bending setup, and immediately an active crack width control technique was applied to restrain the crack width of the specimens to a desired crack width range. After measuring of the crack width, the water permeability of the mortar specimens was accessed in a water flow test. In the end, the specimens were cracked open to assess the spread of the polyurethane healing agent.</p>
Concrete Statue
Created in RealityCapture by Capturing Reality from 890 images in 01h:16m:19s. Source: Objaverse 1.0 / Sketchfab
Concrete hedgehog anti-tank
The Czech hedgehog (Czech: rozsocháč or ježek) is a static anti-tank obstacle defense made of metal angle beams or I-beams (that is, lengths with an L- or I-shaped cross section). The hedgehog is very effective in keeping light to medium tanks and vehicles from penetrating a line of defense; it maintains its function even when tipped over by a nearby explosion. Although Czech hedgehogs may provide some scant cover for infantry, infantry forces are generally much less effective against fortified defensive positions than mechanized units. Source: Objaverse 1.0 / Sketchfab
Concrete Wall 24 Meter
# This is a 3D Scan of a old Cocrete Wall with a distance from 24 Meters * Highpoly * Real World Scaling and Alignmend * VR Ready * 8K JPEG Textures - Diffuse, Roughness, Normal * FBX File Format Source: Objaverse 1.0 / Sketchfab
RK17 F0001 Concretion - Stage 1
RK17 F0001 is a large concretion found during the archaeological excavation of the Rooswijk in 2017. The concretion was excavated by conservators and archaelogists in the conservation facility. In 2017 and 2018, the shipwreck of the Rooswijk, a 300 year old Dutch East India Company (VOC) ship which sank on the treacherous Goodwin Sands in January 1740 off the coast of England, was excavated by an international team of maritime archaeologists. Post-excavation work began straight after each excavation campaign, focusing on ex-situ research, the conservation and analysis of the artefacts and will continue until the end of the project. The #Rooswijk1740 project is funded and led by the Cultural Heritage Agency of the Netherlands (Ministry of Education, Science and Culture), in collaboration with project partner Historic England and UK-contractor MSDS Marine. Follow #Rooswijk1740 on social media and https://english.cultureelerfgoed.nl/topics/maritime-heritage/shipwrecks/rooswijk1740 Source: Objaverse 1.0 / Sketchfab
Brutal outdoor concrete hexagon flower pot
Brutal outdoor concrete hexagon flower pot public space planter - **test for a community 3D print** https://en.wikipedia.org/wiki/Brutalist_architecture @ Usti nad Labem, regional goverment building https://goo.gl/maps/pGcUzD3mnbHxHVxbA Legendary 1980s design by Prefa Přeštice, more info: https://www.fb.com/architektura489/posts/1214134412117289 Photogrammmetry scan 160x24MP, Free download, 16K texture. Source: Objaverse 1.0 / Sketchfab
Concrete Pedestal Photoscan
Images captured on a smartphone, model and textures generated in Meshroom, final adjustments and baking in Blender. One 4k diffuse texture. Location: -33.8985, 151.2390 Source: Objaverse 1.0 / Sketchfab
Dual Brutal outdoor concrete hexagon flower pot
Dual Brutal outdoor concrete hexagon flower pot public space planter https://en.wikipedia.org/wiki/Brutalist_architecture @ Prague, redisential area street https://goo.gl/maps/HR3kP8ytP5YtneL47 Legendary 1980s design by Prefa Přeštice, more info: https://www.fb.com/architektura489/posts/1214134412117289 Photogrammmetry scan 160x24MP, Free download, 3x8K texture Created in RealityCapture by Capturing Reality Source: Objaverse 1.0 / Sketchfab
RK17 F00001 Concretion Stage 5
RK17 F00001 is a large concretion found during the archaeological excavation of the Rooswijk in 2017. The concretion was excavated by conservators and archaelogists in the conservation facility. In 2017 and 2018, the shipwreck of the Rooswijk, a 300 year old Dutch East India Company (VOC) ship which sank on the treacherous Goodwin Sands in January 1740 off the coast of England, was excavated by an international team of maritime archaeologists. Post-excavation work began straight after each excavation campaign, focusing on ex-situ research, the conservation and analysis of the artefacts and will continue until the end of the project. The #Rooswijk1740 project is funded and led by the Cultural Heritage Agency of the Netherlands (Ministry of Education, Science and Culture), in collaboration with project partner Historic England and UK-contractor MSDS Marine. Follow #Rooswijk1740 on social media and https://english.cultureelerfgoed.nl/topics/maritime-heritage/shipwrecks/rooswijk1740 Source: Objaverse 1.0 / Sketchfab
Quasi-Static Cyclic Tests of Two U-Shaped Reinforced Concrete Walls
<p>U-shaped or channel-shaped walls are frequently used as lateral strength providing members in reinforced concrete (RC) buildings since their form does not only provide strength and stiffness in any horizontal direction but is also well suited to accommodate elevator shafts or staircases. Despite this popularity, experimental results on the seismic behavior of U-shaped walls are scarce. For this reason a research program with the objective to provide additional experimental evidence for such walls under seismic loading was developed. It included quasi-static cyclic testing of two U-shaped walls at the structural engineering laboratories of the ETH Zurich. The walls were built at half-scale and designed for high ductility. The main difference between the two walls was their wall thickness. The project was chiefly focusing on the bending behavior in different directions and therefore the walls were subjected to a bi-directional loading regime. This article discusses the design of the test units, the test setup and the test predictions. Finally the main results are summarized in terms of failure mechanisms and force-displacement hystereses.</p>
Tests on Thin Reinforced Concrete Walls Subjected to In-plane and Out-of-plane Cyclic Loading - General
<p>The entire dataset describes an experimental campaign on five thin T-shaped reinforced concrete walls, including: details on the test units, materials, test setup, loading protocol, instrumentation, main features of each unit’s response, organization of the provided test data, and examples of derived data. The tests aimed at assessing the influence of wall thickness on member stability, the role of lap splices on damage distribution and displacement ductility, and the effects of the simultaneous application of out-of-plane loading on the member response.</p>
Cyclic tensile-compressive tests on thin concrete boundary elements with a single layer of reinforcement prone to out-of-plane instability
<p>The growing need for residential housing in Latin American countries has led to the construction of reinforced concrete buildings with wall thicknesses as low as 8-10 cm. Such walls have typically only a single layer of vertical rebars and are therefore particularly susceptible to out-of-plane failure. To investigate the response of the corresponding wall boundary elements, twelve reinforced concrete columns with a single layer of vertical rebars were tested under tension-compression cycles. The objective of this test series was to gain insights into parameters triggering wall instability and out-of-plane failure. The experimental tests investigate the effect of thickness, reinforcement ratio, and eccentricity of the longitudinal rebars with respect to the element axis. This paper summarises the results of the test campaign. The specimen response is analysed at the global and local level, and the influence of the crack pattern on the out-of-plane response of the column and the conditions leading to out-of-plane failure are described. Furthermore, the differences between members with a single layer of vertical rebars to members with two layers are discussed. The influence on the response of the parameters analysed in the experimental campaign is addressed, showing that section with small thickness and large reinforcement content are more prone to out-of-plane failures. Finally, the predictions of existing models are compared to the new experimental data. The entire data set is publically available.</p>
Data and code to accompany the manuscript Phillipsite and Al-tobermorite mineral cements produced through low-temperature water-rock reactions in Roman marine concrete, American Mineralogist
<p>EPMA data and code used to produce figures in the publication.</p>
Small concrete bunker with graffiti
The interior of this old WW2 pillbox or observation post now partly hidden in the trees had interesting looking layers of graffiti. (Texture photoshopped to edit out the rude bits!) Orewa, New Zealand. My 3D model from photos uploaded with photogrammetry software 3DF Zephyr v5.019 Source: Objaverse 1.0 / Sketchfab
RK17 F00001 Concretion Stage 8
RK17 F00001 is a large concretion found during the archaeological excavation of the Rooswijk in 2017. The concretion was excavated by conservators and archaelogists in the conservation facility. In 2017 and 2018, the shipwreck of the Rooswijk, a 300 year old Dutch East India Company (VOC) ship which sank on the treacherous Goodwin Sands in January 1740 off the coast of England, was excavated by an international team of maritime archaeologists. Post-excavation work began straight after each excavation campaign, focusing on ex-situ research, the conservation and analysis of the artefacts and will continue until the end of the project. The #Rooswijk1740 project is funded and led by the Cultural Heritage Agency of the Netherlands (Ministry of Education, Science and Culture), in collaboration with project partner Historic England and UK-contractor MSDS Marine. Follow #Rooswijk1740 on social media and https://english.cultureelerfgoed.nl/topics/maritime-heritage/shipwrecks/rooswijk1740 Source: Objaverse 1.0 / Sketchfab
Brutal outdoor concrete flower pot
Brutalist outdoor concrete flower pot - **test for a community 3D print** https://en.wikipedia.org/wiki/Brutalist_architecture @ Usti nad Labem https://goo.gl/maps/5Q1B4EUKtv2czRhT9 Legendary 1980s design by Prefa Přeštice, more info: https://www.fb.com/architektura489/posts/1214134412117289 **Free 3D printable file (edited and cleaned .STL) by @pasta3d: ** https://sketchfab.com/3d-models/brutal-outdoor-concrete-flower-pot-print-edit-1c6e58990abb488ab15cc95329b6cefa Free download, Draft capture, 16K texture. Source: Objaverse 1.0 / Sketchfab
Evaluation of the self-healing capacity of concrete with low-cost macro-capsules
<p>This study focuses on the evaluation of the efficiency of a low-cost macrocapsule, using commercially available pharmaceutical capsules with specific modifications, for self-healing concrete. The macrocapsules were developed by the Belgian Building Research Institute in a previous study. The healing agent is a resin based on alkyd-urethane, a low-cost commercial product, which was selected for its compatibility with concrete and shell, and also for the following reasons: resin release, adhesion to concrete, and reduction in capillary water absorption. After their manufacturing, the macrocapsules were carefully integrated within the concrete mix at 5 volume-%, and cubes and slabs for compressive and impact tests were cast. Small beams 160 x 40 x 40 mm<sup>3</sup> containing each three capsules (placed 15 mm above the bottom surface) were tested for flexural strength and capillary water absorption. The effect of self-healing was evaluated by sorptivity test for two different crack mouth opening displacements of 0.5 mm and 0.9 mm. In both cases, the cracks were partially or completely healed, and the mechanical properties of the macrocapsule specimens were quite the same as the reference specimens. This demonstrates that the modified low-cost macrocapsules are sufficient to heal large cracks without losing the concrete mechanical properties.</p>
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