Results 81 to 90 of about 60,085 (278)

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

open access: yesDeep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan   +4 more
wiley   +1 more source

Marine Anoxia and Ocean Acidification During the End‐Permian Extinction

open access: yesGeophysical Monograph Series, Page 325-340., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Ying Cui   +4 more
wiley  

+1 more source

The reaction of slag in cement: theory and computer modelling [PDF]

open access: yes, 2006
In this study, theoretical models available for the reaction of both pure slag\ud (alkali-activated) and slag-blended cement are reviewed.
Brouwers, H.J.H., Chen, W.
core   +1 more source

Restrained Shrinkage of Fly Ash Based Geopolymer Concrete and Analysis of Long Term Shrinkage Prediction Models [PDF]

open access: yes, 2017
The research presented in this manuscript describes the procedure to quantify the restrained shrinkage of geopolymer concrete (GPC) using ring specimen. Massive concrete structures are susceptible to shrinkage and thermal cracking.
Ahmed, Mahbub K   +3 more
core   +3 more sources

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

open access: yesDeep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu   +8 more
wiley   +1 more source

Transformation of a Silicate Material for Carbon Negative Magnesia‐Based Cement via Electrochemistry

open access: yesAdvanced Science
Magnesium silicate hydrate cement (M‐S‐H) can be formed from magnesium oxide (MgO) and silica phases which offer unique properties compared to traditional calcium‐based Portland cement (PC).
Anthony R. Ramuglia   +11 more
doaj   +1 more source

Literature review Characteristics and rationale for the clinical application of tricalcium silicate cement sealer

open access: yesЭндодонтия Today, 2020
Bioceramics-based sealers were introduced to the market after bioceramic cements had appeared. Recently, lots of studies have been carried out regarding the physicochemical and biological properties of sealer such as BioRoot RCSTM based on tricalcium ...
Z. S. Khabadze   +6 more
doaj   +1 more source

Functional glass-ceramic foams from \u2018inorganic gel casting\u2019 and sintering of glass/slag mixtures [PDF]

open access: yes, 2018
The here described investigation was essentially aimed at exploring the chemical stabilization and reutilization of iron-rich slag from copper metallurgy, by the manufacturing of glass-ceramic foams.
Bernardo, Enrico   +2 more
core   +1 more source

Investigation of the effect of consolidation on cement flow behaviour [PDF]

open access: yes, 2020
International audienceOne of the main problems affecting the flow of cement bulk powder is the formation of cohesive arching at the outlet of the hopper, causing blockage of the silo opening and bridge formation.
Belarbi, El-Habib   +3 more
core   +2 more sources

Selective Optical Properties of Cement for Enhanced Radiative Cooling and Energy‐Efficient Construction Materials

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Cement phases are good materials for radiative cooling thanks to the selective emissivity in IR ATW. Cement powders have high reflectance of solar radiation which reduces the thermal losses. The onset of the absorption curves is defined by bound excitons. Sulfates have higher radiated powers and reflectance than calcium silicates.
Jozef Janovec   +3 more
wiley   +1 more source

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