Kevlar fibers are widely used for industrial and military purposes due to their remarkable mechanical properties, such as their high tenacity and high strength-to-weight ratio. In this study, two-layered Kevlar composite specimens were impregnated with 10 wt.% poly (vinyl butyral)/ethanol solution which contained TiO2 nanoparticles as reinforcement...
Published in Materials Research Express
The combination of electrospun nanofibers and nanoparticles is opening up potential in the field of bifunctional materials. Herein, polystyrene (PS, Mw ≈ 260, 000), polyvinyl pyrrolidone (PVP, Mw ≈1, 300, 000), and poly(methyl methacrylate) (PMMA, Mw ≈ 350, 000) bifunctional fibers containing Tb(acac)3phen complexes (acac: acetylacetone, phen: 1,10...
Published in Science and Engineering of Composite Materials
The study aims to substitute river sand used in ultra-high performance concrete (UHPC) with pond ash (PA), a waste by-product from the Sikka thermal power station in Gujarat, India, at replacement levels ranging from 0 to 20%. Also, 20% of the cement was replaced with ground granulated blast-furnace slag, which is a sustainable, eco-friendly materi...
Traffic sign recognition is one of the main components of intelligent transportation systems (ITS). It improves safety by informing the driver of the current state of the road, e.g. warnings, prohibitions, restrictions and other information useful for driving. This paper presents a new road signs recognition method which is achieved in three main s...
Vývoji a praktickému uplatnění materiálu UHPC je stále věnováno velké množství pozornosti. Kotvení v tomto moderním kompozitním materiálu představuje důležitou součást komplexní problematiky navrhování a realizace prefabrikovaných konstrukcí z UHPC. Práce se zaměřuje na vlastnosti kotvení v prvcích z materiálu UHPC. Cílem práce je provedení experim...
status: Published online
Published in Frontiers in Nutrition
Published in Functional Composites and Structures
This study aims to investigate the viability of untreated sisal fibers (N.F.), NaOH-treated sisal fibers (NaOH.F.) and cellulose extracted from sisal (CELL.F.) as an alternative to synthetic materials to produce biocomposites. The main objective was to conduct an in-depth study of the properties of these fibers whose aim is to limit matrix/fiber sl...
Published in Frontiers in Environmental Science
Microplastics are found in agricultural soils worldwide; however, little is known about the impacts of this ubiquitous pollutant on the growth and development of crops. Microfibres are one of the dominant microplastic types found in agricultural soils. Sources of microfibres in the agricultural environment are multiple, including soil amendment app...
Tato práce je zaměřena na problematiku tunelových betonových ostění za požáru, zejména na negativní jev betonu při vystavení požáru, tj. odštěpování. Nejprve byly shrnuty normové požadavky na betonové ostění. Těmito požadavky jsou požadovaná požární odolnost betonového ostění a třída reakce na oheň ostění a jeho povrchových úprav. Dále byla stručně...
