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Title |
Diamond-Shaped Strength Control Prediction Model for CSG Dam Concrete Considering the Compressive Strength and Vebe Test Results
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Authors |
박주현(Ju-Hyun Park) ; 조중훈(Jung-Hun Cho) ; 이은솔(Eun-Sol Lee) ; 이종한(Jong-Han Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.4.561 |
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Keywords |
CSG 댐; 압축강도; 비비시험; 마름모꼴 강도관리; 예측모델 CSG dam; compressive strength; vebe test; diamond-shaped strength control; prediction model |
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Abstract |
This study proposed a diamond-shaped strength control model to determine whether a CSG dam concrete mixture satisfies both the compressive strength and the vebe test criteria at the mix-design stage. To overcome the limitation of conventional quality management relying on 28-day strength test results, this study constructed and integrated an XGBoost-based compressive strength prediction model and a vebe test decision model. The compressive strength prediction model achieved an accuracy rate of 93.0 % within ±10 %, while the vebe decision model achieved accuracy of 98.1 %. The integrated diamond-shaped strength control algorithm achieved accuracy of 90.6 % in a measurement-based validation assessment. Applying the integrated algorithm to each aggregate type and varying the W/C ratio, this study predicted and visualized the feasible mix region satisfying both the target strength and the workability criteria as a diamond-shaped region, providing a basis for proactive quality management at the mix-design stage.
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