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Articles by Wonchang Kim
AI-driven quality classification of concrete after high-temperature exposure: a hybrid framework for structural integrity assessment
Abstract Accurately assessing the residual performance of fire-damaged concrete is crucial for structural safety but challenging due to non-linear degradation. Traditional methods often suffer from data scarcity and lack objective quality criteria, creating a prediction-decision gap. This study introduces a novel AI-driven quality classification framework, shifting from numerical prediction to actionable decision-making.
Experimental Evaluation of Concrete Blended with Eco-Friendly Bio-Sulfur as a Cement Replacement Material
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Materials | Free Full-Text | Statistical Reliability Analysis of Ultrasonic Velocity Method for Predicting Residual Strength of High-Strength Concrete under High-Temperature Conditions
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Strength Prediction of Non-Sintered Hwangto-Substituted Concrete Using the Ultrasonic Velocity Method
All articles published by MDPI are made immediately available worldwide under an open access license. No special permission is required to reuse all or part of the article published by MDPI, including figures and tables. For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. For more information, please refer to https://www.mdpi.com/openaccess.
Evaluation on Early Strength Development of Concrete Mixed with Non-Sintered Hwangto Using Ultrasonic Pulse Velocity
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A Study to Improve the Reliability of High-Strength Concrete Strength Evaluation Using an Ultrasonic Velocity Method
3.1. Mechanical Properties of Concrete 3.1.1. Compressive Strength Figure 5 shows the compressive strengths of the specimens with respect to age (Figure 5a) and temperature (Figure 5b). At the same target strength, NAC exhibited a higher compressive strength than LAC for all ages. Previous studies have also reported that concrete blended with conventional lightweight aggregates exhibits low strength development due to the low strength of the aggregates. Vargas et al.
Materials | Free Full-Text | Investigating Ultrasonic Pulse Velocity Method for Evaluating High-Temperature Properties of Non-Sintered Hwangto-Mixed Concrete as a Cement Replacement Material
Open AccessArticle by Wonchang Kim 1, Hyeonggil Choi 2,* and Taegyu Lee 1,* 1 Department of Fire and Disaster Prevention, Semyung University, Choongbuk 27136, Republic of Korea 2 School of Architecture and Civil Engineering, Kyungpook National University, Daegu 41566, Republic of Korea * Authors to whom correspondence should be addressed.
Residual Compressive Strength Prediction Model for Concrete Subject to High Temperatures Using Ultrasonic Pulse Velocity
This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Wonchang Kim 1, Hyeonggil Choi 2,* and Taegyu Lee 1,* 1 Department of Fire and Disaster Prevention, Semyung University, Jecheon-si 27136, Republic of Korea 2 School of Architecture and Civil Engineering, Kyungpook National University, Daegu 41566, Republic of Korea * Authors to whom correspondence should be addressed.
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