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Acoustic signatures of hydration and microcracking in early-age concrete Vrije Universiteit Brussel
Processes occurring during concrete curing such as settlement, hydration, and early-age shrinkage cracking define its long-term performance. These processes result in the emission of elastic waves which contain characteristic information about them. In this study, concrete is monitored from its fresh state up to its early hardening state, using Acoustic Emission (AE), a technique that records waves released by irreversible processes within the ...
Layer-by-layer delithiation during lattice collapse as the origin of planar gliding and microcracking in Ni-rich cathodes University of Antwerp
High-energy-density nickel (Ni)-rich cathode materials are used in commercial lithium (Li)-ion batteries for electric vehicles, but they suffer from severe structural degradation upon cycling. Planar gliding and microcracking are seeds for fatal mechanical fracture, but their origin remains unclear. Herein, we show that "layer-by -layer delithiation"is activated at high voltages during the charge process when the "lattice collapse"(a ...
Fire-exposed stones in constructions: Residual strength, performance loss and damage mode shift due to mineralogical transformation and micro-cracking Vrije Universiteit Brussel
The heritage restoration and the design of modern stone masonry structures bear in mind the material response to fire, the residual strength and post-fire resilience. In this attempt, the decomposition of fire-exposed natural and engineered stones and their mineralogical transformations are reported. The fire-induced petrographic change is further correlated to rise in shrinkage and porosity, and loss of mechanical properties, such as strength, ...
Revised macro-cracking criterion for massive non-reinforced self-compacting concrete structures under thermal load based on extensive experimental testing and field observations University of Antwerp
The Oral Bioavailability and Metabolism of Midazolam in Stable Critically Ill Children: A Pharmacokinetic Microtracing Study KU Leuven
Midazolam is metabolized by the developmentally regulated intestinal and hepatic drug-metabolizing enzyme cytochrome P450 (CYP) 3A4/5. It is frequently administered orally to children, yet knowledge is lacking on the oral bioavailability in term neonates up until 1 year of age. Furthermore, the dispositions of the major metabolites 1-OH-midazolam (OHM) and 1-OH-midazolam-glucuronide (OHMG) after oral administration are largely unknown for the ...
A fundamental investigation of textile reinforced cementitious composites tensile response by Acoustic Emission Vrije Universiteit Brussel
The fracture processes on coupons of glass-fibre textile reinforced cementitious (TRC)matrix composites under tension are revealed using acoustic emission monitoring (AE)method. The fundamental study, based on acoustic signals magnitude, shape and frequency content, discloses the presence of early mortar micro-cracking and assesses the nature of multi-scale damage developed as the ultimate matrix strength is reached. At post-cracking stage, ...