Utilization of Machine-Made Sand Waste in 3D-Printed Ecological Concrete for Artificial Reefs

Case Studies in Construction Materials, Journal Year: 2025, Volume and Issue: unknown, P. e04494 - e04494

Published: March 1, 2025

Language: Английский

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Lactams Exhibit Potent Antifungal Activity Against Monospecies and Multispecies Interkingdom Biofilms on a Novel Hydrogel Skin Model

Apmis, Journal Year: 2025, Volume and Issue: 133(1)

Published: Jan. 1, 2025

ABSTRACT Infections of intact and damaged skin barriers keratin are frequently associated with complex biofilm communities containing bacteria fungi, yet there limited options for successful management. This study intended to focus on the utility some novel proprietary lactam molecules, quorum sensing (QS)–derived halogenated furanones, which act block QS pathway, against key fungal pathogens ( Candida albicans , Malassezia furfur Microsporum gypseum ). Moreover, we aimed assess how these actives performed interkingdom biofilms in a clinically relevant model. Two derivatives were tested panel important then quantitatively assessed simple increasingly models polystyrene coverslips hydrogel system. The lactams shown be effective wide range species planktonic forms, no ability regrow. component multispecies was significantly reduced treatment. Lactam treatment also comparably compared non‐prescription topical antifungal ‘Lamisil’ C. early late biofilms. highlights effectiveness as antimicrobial management polymicrobial

Language: Английский

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A comprehensive review of the bio-corrosion mechanisms, hydrodynamics and antifouling measures on marine concrete

Ocean Engineering, Journal Year: 2024, Volume and Issue: 310, P. 118696 - 118696

Published: July 16, 2024

Language: Английский

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The Effect of Biofouling on Cement based Concrete Substrate: Insights from Microfouling and Macrofouling Growth

BIO Web of Conferences, Journal Year: 2025, Volume and Issue: 157, P. 06001 - 06001

Published: Jan. 1, 2025

Biofouling poses a significant impact to the durability of offshore structures and vessels, yet its on cement-based concrete in marine environments remains underexplored. This study investigated biofouling growth substrates both microbial biofilms (microfouling) up macrofouling their effect cement based surface. The discussion is supported by literature review contextualize findings. type microorganisms forming are influenced specific environment, substrate characteristics, immersion duration. These factors collectively altering community composition, biochemical activity, mechanisms attachment. microfouling contribute chemical degradation, surface roughness alteration, addition weight. Such combined effects accelerate biodeterioration highlighting critical need for effective mitigation strategies enhance durability. Protective approaches, including antifouling coatings, treatments, advanced materials resistant bioadhesion, essential prolong lifespan ensure exposed biofilm formation macrofouling.

Language: Английский

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Enhancing corrosion resistance in concrete structures using Euphorbia Tortilis cactus extract by non-destructive testing

Zastita materijala, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

This research investigates the corrosion resistance of reinforced concrete structures, a crucial aspect for ensuring their long-term performance and sustainability. Utilizing both half-cell potential method an accelerated test, study introduces novel approach by incorporating Euphorbia Tortilis Cactus (ETC) extract as organic additive in concrete. The involves measuring differences between steel reinforcement external electrode Cu/CuSO4 solution, revealing varied inhibition levels different specimens. Notably, introduction ETC demonstrates unprecedented resistivity, showcasing mere 10% probability corrosion, even atmospheric conditions. test further emphasizes novelty research. exhibits lower applied current mass loss percentages compared to control mixes, indicating superior reduced porosity. use enhances its durability sustainability, providing valuable insights developing resilient structures amid increasing concerns about corrosion-induced deterioration constructions.

Language: Английский

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A sustainable bioremediation of vanadium from marine environment and value-addition using potential thraustochytrids

Bioresource Technology, Journal Year: 2024, Volume and Issue: 411, P. 131356 - 131356

Published: Aug. 25, 2024

Language: Английский

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Experimental study on concrete-breaking by self-excited oscillating cavitation waterjet in a submerged environment

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(9)

Published: Sept. 1, 2024

Self-excited oscillating cavitation waterjet (SOCW) has good prospects for application in concrete-breaking the ocean. This study investigates breaking mechanism of concrete subjected to SOCW a submerged environment, with focus on identifying damage characteristics at both macroscopic and microscopic levels using scanning electron microscopy computed tomography. The effect under impact various times, jet pressures, distances, strength grades was compared. It found that (a) best achieved by ensuring 30 MPa pressure 5 mm distance. (b) Internal pores water wedge accelerated crack propagation. formation pits result closed loops formed cracks leading spalling. (c) Microscopic analysis revealed plastic deformation surface, forming through stages collapse, pore expansion, coalescence. provides theoretical understanding technical support follow-up research parameter optimization efficiency technology.

Language: Английский

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Bio-colonisation, durability, and microstructural analysis of concrete incorporating magnetite and oyster shell waste aggregates in marine environment

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 456, P. 139269 - 139269

Published: Nov. 26, 2024

Language: Английский

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Short-term interactions of concrete, biofilm, and seawater in the submerged zone of marine environments for sustainable floating offshore wind turbines

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 451, P. 138840 - 138840

Published: Oct. 28, 2024

Language: Английский

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Effect of constrictivity of gel/capillary pores in concrete on chloride ions migration

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 18, 2024

Abstract Corrosion of steel bars due to chloride ions in seawater migration into reinforced concrete (RC) lining is a major factor affecting the lifetime subsea tunnels. To improve safety assessment existing tunnels, coupled hydraulic-mechanical-chemical (H-M-C) model proposed simulate process with hydrostatic pressure RC tunnels for obtaining long-term distribution more accurately. In H-M-C model, volume fluid fraction and convection velocity obtained from bidirectionally hydraulic mechanic analysis are unidirectionally considered convection, diffusion, adsorption lining. addition, consider influence microscopic pores (e.g., gel capillary pores) size on ion migration, classic expression effective diffusion coefficient modified by considering constrictivity that varies nonlinearly pore size. Results indicate zone, concentration significantly increases increasing gel/capillary radius ( r peak ), leading rapid non-linear decrease service time tunnel. Afterward, clearly ascertain sensitivity effects analyses carried out four sets parameters (i.e., saturated permeability, van Genuchten parameters, initial saturation, binding capacity parameters). The results suggest ) penetration sensitive saturation S e than vG m ). Furthermore, increase under different conditions increasing.

Language: Английский

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