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1223. Identification of the damage types for reinforced concrete using CNN modelsYue Shi, RunYu Wang, Xue Bai, 2025, original scientific article Keywords: convolutional neural network, reinforced concrete, damage detection, image recognition, structural health monitoring, deep learning
Published in DiRROS: 01.09.2025; Views: 425; Downloads: 197
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1226. Thermal and mechanical properties of in-house-manufactured PLA and PA filaments at high temperatureNabilah Afiqah Mohd Radzuan, Izzat Mat Samudin, M. S. H. Al-Furjan, Abu Bakar Sulong, Farhana Mohd Foudzi, Muhammad Amin Azman, 2025, original scientific article Keywords: polymer composites, additive manufacturing, mechanical properties, finite element analysis
Published in DiRROS: 01.09.2025; Views: 396; Downloads: 181
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1229. Municipal solid waste incineration (MSWI) bottom ash-blended cementitious materials : performance, challenges, and potential solutionsBoyu Chen, Priyadharshini Perumal, Chen Liu, Yun Chen, Cheng Chang, Majda Pavlin, Davor Kvočka, Vilma Ducman, Tero Luukkonen, Mirja Illikainen, Guang Ye, 2025, review article Abstract: The recycling of municipal solid waste incineration (MSWI) bottom ash as a supplementary cementitious material (SCM) has attracted global attention, driven by the increasing availability of this by-product and the demand for sustainable SCMs to lower CO2 emissions from cement production. Currently, the widespread use of MSWI bottom ash in the cement industry is hindered by the lack of guidelines to regulate material composition, optimize pretreatment processes, and specify mix design requirements. This review compiles and analyzes literature data on mix design, microstructural evolution, fresh properties, mechanical properties, durability, leaching risks, and environmental impacts of MSWI bottom ash-blended cement pastes, mortars, and concretes. The analysis aims to assess the influence of the pretreatment and physicochemical properties of bottom ash on the microstructure and performance of blended cementitious materials. The Ash Impact Strength Index (AISI) is introduced to quantify the effects of various factors on compressive strength, enabling direct comparison across different studies. Based on the statistical analysis of the 28-day AISI, the key quality requirements for MSWI bottom ash as an SCM are proposed, along with the optimal mix design. This work provides valuable insights and practical guidance to support the integration of bottom ash into the cement industry.
Keywords: ash, ash-blended cementitious materials, performance
Published in DiRROS: 29.08.2025; Views: 420; Downloads: 275
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1230. Effect of sulfide in a 0.2 M NaCl solution on copper and pre-oxidized copper in oxic conditionsKlara Prijatelj, Tadeja Kosec, 2025, original scientific article Abstract: This study investigated copper and pre-oxidized copper immersed in 0.2 M NaCl solutions containing different concentrations of sulfide ions. In order to investigate the corrosion processes, the corrosion potential and electrochemical impedance at room temperature and at an elevated temperature were measured for 24 h during and after exposure to the chloride solution with different sulfide concentrations in aerated conditions. The surfaces of the pre-oxidized copper were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy (EDS), a focused ion beam scanning electron microscopy (FIB-SEM), and Raman spectroscopy. It was shown that the concentration of sulfide ions in the chloride environments, in addition to the temperature itself, greatly affect the film formation in oxic conditions. The thickness of the films observed corresponds well to those calculated using cathodic stripping voltammetry. The mechanism of corroding copper in chloride/sulfide system was proposed.
Keywords: copper, pre-oxidized copper, chloride and sulfide environment, electrochemical properties, surface characterization, Raman, cyclic voltammetry
Published in DiRROS: 29.08.2025; Views: 410; Downloads: 264
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