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Hyeonggil Choi

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Articles

Strength Prediction of Non-Sintered Hwangto-Substituted Concrete Using the Ultrasonic Velocity Method

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By Wonchang Kim, Hyeonggil Choi, Taegyu Lee, Hajun Im
| MDPI
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.
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Evaluation on Early Strength Development of Concrete Mixed with Non-Sintered Hwangto Using Ultrasonic Pulse Velocity

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By Wonchang Kim, Hyeonggil Choi, Youngjin Nam, Keesin Jeong
| MDPI
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Effects of Nitrite/Nitrate-Based Accelerators on Strength and Deformation of Cementitious Repair Materials under Low-Temperature Conditions

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By Masumi Inoue, Hyeonggil Choi, Heesup Choi, Myungkwan Lim
| MDPI
2.2. Experimental Conditions and Methods Material management, kneading, placing, and curing were performed in a 5 °C environment according to the “Building Work Standard Specifications/Explanation (JASS 5)” of the Architectural Institute of Japan, which states the condition that “the lower limit of the temperature at the time of unloading can be set to 5 °C” [25,26].
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