Research on a Multi-Objective Optimization Design for the Durability of High-Performance Fiber-Reinforced Concrete Based on a Hybrid Algorithm

Coatings, Journal Year: 2023, Volume and Issue: 13(12), P. 2054 - 2054

Published: Dec. 7, 2023

To achieve durable high-performance fiber-reinforced concrete that meets economic requirements, this paper introduces a hybrid intelligent framework based on the Latin hypercube experimental design, response surface methodology (RSM), and NSGA-III algorithm for optimizing mix design of concrete. The developed allows prediction performance obtains series Pareto optimal solutions through multi-objective optimization, ultimately identifying best proportion. decision variables in optimization are proportions various materials mix, with concrete’s frost resistance, chloride ion permeability cost as objectives. feasibility was subsequently validated. results indicate following: (1) RSM model exhibits high level predictive accuracy, coefficient determination (R-squared) values 0.9657 resistance 0.9803 resistance. can be employed to construct fitness function algorithm, enhancing efficiency optimization. (2) effectively balances durability considerations determine proportion After improved by 38.1% 6.45%, respectively, compared averages, while decreased 2.53%. method proposed applied practical engineering projects, improving design.

Language: Английский

Evaluation of Boerhaavia diffusa roots extract as a sustainable corrosion inhibitor for mild steel in sulfuric acid environments

Vietnam Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

Abstract Mild steel (MS) is a widely used type of because its different types qualities like versatility, affordability, and ease modification. On the other hand, vulnerability to corrosion may somewhat detract from merits. To mitigate impacts various techniques are applied. The use inhibitors remains one most effective strategies prevent corrosion, especially in environments where sustainability increasingly important. In this study, we evaluated corrosion‐inhibiting properties Boerhaavia diffusa (BHD) root extract concentrations (1–6%) on mild an acidic solution (0.1 M H 2 SO 4 ). characterize functional groups present BHD extract, Fourier‐transform infrared spectroscopy (FTIR) was employed. A combination methods, including weight loss measurements, electrochemical polarization, impedance (EIS), metallurgical research microscopy (MRM), scanning electron (SEM), were assess effectiveness inhibition. showed maximum inhibition efficiency (IE) 86.58% charge transfer resistance ( R ct ) 308 Ω cm recorded for 6% concentration at 25 °C. This study carried out 25, 35 45 revealed that excellent green inhibitor.

Language: Английский

Electrochemical behavior of 250-grade maraging steel by using Cascabela Thevetia as an organic inhibitor

Canadian Metallurgical Quarterly, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17

Published: Dec. 17, 2024

The Cascabela Thevetia (CT) plant, from the Apocynaceae family, is known for its use in traditional medicine across Central and South America tropical Asia. This study examines effect of CT leaf extract on corrosion behavior maraging steel a 1 M H2SO4 solution. addition (10 to 50 ml) reduced rate (CR), with higher concentrations leading greater inhibition efficiency, 64.04% 88.35%. Same trend observed rising temperatures. Electrochemical impedance spectroscopy (EIS) revealed that Rct (charge transfer resistance) increases inhibitor concentration, signifying enhanced 'blanketing' properties protective film as concentration increases. Additionally, calculated free energy value i.e.ΔG∘ ≤ 20 KJ/mol suggests physisorption dominant adsorption process. reduction randomness molecules evident ΔS∘. Moreover, positive ΔH∘ indicates process endothermic. SEM analysis confirmed surface porosity, resulting smoother surface.

Language: Английский