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360 results for “cements”
Coincident locations of rupture nucleation during the 2019 Le Teil earthquake, France and maximum stress change from local cement quarrying
<p>Earthquakes occurrence is controlled by tectonic stress load. However, it is now proved that geoengineering operations can contribute enough stress change to cause an earthquake. Industrial operations can produce either increase in the stress load and/or degradation of strength on nearby active faults, rising the potential for failure, or cause break on inactive faults that would have not moved instead. The 2019, M<sub>W</sub>=4.9, Le Teil (France) earthquake occurred in a relatively low strain rate area. Its location very close to a cement quarry, where significant mass removal has been continuously carried out for almost two centuries, raises questions about the possible link between stress change associated with rock extraction and occurrence of earthquakes. Here we show that the anthropic activity could have induced or at least triggered the Le Teil earthquake. In this latter case its occurrence could have been hastened by more than 100,000 years. Our results suggest that further mass removal in the area might induce even stronger earthquakes, by activating deeper sectors of the same fault plane.</p>
Dataset for publication Eslam El-Seidy, Mehdi Chougan, Matteo Sambucci, Mazen J. Al-Kheetan, Marco Valente, Seyed Hamidreza Ghaffar. (2023). Lightweight alkali-activated materials and ordinary Portland cement composites using recycled polyvinyl chloride and waste glass aggregates to fully replace natural sand. Construction & Building Materials, doi: https://doi.org/10.1016/j.conbuildmat.2023.130399
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Dataset for publication 7. Eslam El-Seidy, Mehdi Chougan, Yazeed A. AI-Noaimat, Mazen J. Al-Kheetan, Seyed Hamidreza Ghaffar. (2024). The impact of waste brick and geo-cement aggregates as sand replacement on the mechanical and durability properties of alkali–activated mortar composites, Results in Engineering, doi: https://doi.org/10.1016/j.rineng.2024.101797
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Data for Impact of nano-dopants on the mechanical and physical properties of magnesium oxychloride cement composites – experimental assessment
<p>The importance of the World’s reduction of CO2 emissions is inevitable as CO2 is one of the main contributors to climate change. As the Portland cement (PC) industry is a non-negligible contributor to the World’s CO2 emissions, a sustainable PC substitute must be implemented. Previous scientific studies suggest that magnesium oxychloride cement (MOC) – an eco-friendly binder based on reactive magnesia – could be a suitable alternative. This contribution studies the influence of various nanoadditives on the mechanical and physical properties of MOC-based composites. The nanoadditives introduced to the MOC composite were the following: multi-walled carbon nanotubes, oxidized multi‑walled carbon nanotubes, graphene oxide, graphene nanoplatelets, and alumina nanosheets. Ahead of the composite preparation, the nanoadditives were analysed with a wide spectrum of analytical methods to study their composition and microstructure in detail. The used amount of nanoadditive was 1.0 wt.%, relative to the cement paste weight. After a curing period of 28 days, the prepared composite samples underwent a comprehensive analysis of their microstructure, phase, and chemical composition, as well as micro- and macrostructural parameters and mechanical properties. Additionally, the research studied the effects of nanoadditives on the hygric properties and water resistance of the MOC composites after 24-h immersion in water. The findings revealed a noteworthy increase in mechanical performance with the addition of nano-dopants. The highest compressive strength of 85.4 MPa was obtained for the MOC composite enriched with the addition of oxidized multi-walled carbon nanotubes. MOC doped with alumina nanosheets exhibited the best flexural strength (20.99 MPa) and dynamic modulus of elasticity (38.85 GPa). The resistance of MOC composites to deterioration in water was also improved by all the nanoadditives investigated. The softening coefficient determined for samples immersed in water for 24 h varied from 62.7 to 74.8. The best resistance to water degradation was obtained for MOC with alumina nanoadditive, which showed a softening coefficient value about 23.2% higher than that of the reference sample. Thus, the incorporation of nanomaterials as functional nanoadditives in MOC-based composites shows promising advances in both mechanical properties and water resistance, contributing to the development of environmentally sustainable building materials.</p>
3-D micro-architecture and mechanical response of soil cemented via microbial-induced calcite precipitation
<p>The datasets generated and analysed during the current study related to the microstructural and mechanical characterization become available prior to publication date. Data series obtained and analysed for the kinetics study are available from the corresponding author on reasonable request.</p>
Chlorine Determination in Cement Paste Samples Using Laser-Induced Breakdown Spectroscopy and Non-Matching Matrix Calibration Samples – JAAS – Dataset
<p>The dataset provided contains measurements for an article in The Journal of Analytical Atomic Spectrometry (JAAS).</p>
A Randomized Clinical Study Comparing a Fully-Coated Cementless Stem Versus a Cemented Stem for Total Hip Replacements
ClinicalTrials.gov study NCT00689689. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Prospective Randomized Study of Cementless vs Cemented UKA
ClinicalTrials.gov study NCT05377450. IPD Sharing: NO. Countries: 1. Publications: 0.
Hydraulic Cements in Partial Pulpotomy
ClinicalTrials.gov study NCT06881615. IPD Sharing: NO. Countries: 1. Publications: 0.
Cemented vs Cementless Persona Keel RCT
ClinicalTrials.gov study NCT05630053. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Cemented Acetabular Cups Clinical Study
ClinicalTrials.gov study NCT04831918. IPD Sharing: NO. Countries: 1. Publications: 0.
Comparative Evaluation of Effectiveness of Hall Technique and Resin Modified Glass Ionomer Cement in Controlling Occlusoproximal Caries in Primary Molars in Children
ClinicalTrials.gov study NCT04355000. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Resin-Cement Type Influence on Cement Remnants in Implant-Supported Restorations
ClinicalTrials.gov study NCT06711237. IPD Sharing: NO. Countries: 1. Publications: 0.
Evaluation of the Ambuja Cement Foundation Noncommunicable Disease Program in Bathinda District of Punjab, India
ClinicalTrials.gov study NCT04827615. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Cemented Versus Uncemented Total Knee Arthroplasty : a Prospective Randomized Study
ClinicalTrials.gov study NCT02355652. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Clinical Outcomes of CAD/CAM Single-Retainer Monolithic Zirconia Ceramic Resin-Bonded Fixed Dentures Bonded With Two Different Resin Cements
ClinicalTrials.gov study NCT04491097. IPD Sharing: NO. Countries: 1. Publications: 0.
A Comparison of Fixation Method in Total Knee Arthroplasty - Low Viscosity Versus High Viscosity Bone Cement
ClinicalTrials.gov study NCT00175162. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effect of Cemented Stem Design on Periprosthetic Bone Mass Following Primary Total Hip Arthroplasty
ClinicalTrials.gov study NCT00293605. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Bimetric-10: Investigation of Patients Who Have Underwent Total Hip Arthroplasty With a Cemented Bi-Metric Stem
ClinicalTrials.gov study NCT00192699. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Treatment Outcome of Ortho MTA (BioMTA®) Cement vs AH Plus® Bioceramic Sealer (Dentsply).
ClinicalTrials.gov study NCT05984940. IPD Sharing: NO. Countries: 1. Publications: 0.
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.