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Reliable evaluation method of quality control for compressive strength of concrete

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第8期6卷 836-843页

作者： CHEN Kuen-suan SUNG Wen-pei SHIH Ming-hsiang Department of lndustrial Engineering and Management National Chin-Yi Institute of Technologv Taiping Taichung Taiwan 41111 China Department of Landscape Design and Management National Chin-Yi Institute of Technologv Taiping Taichung Taiwan 41111 China Department of Construction Engineering National Kaoshiang First University of Science and Technology Kaoshiang Taiwan 824 China

Concrete in reinforced concrete structure (RC) is generally under significant compressive stress load. To guarantee required quality and ductility, various tests have to be conducted to measure the concrete’s compressive strength based on ACI (American Concrete Institute) code. Investigations of recent devastating collapses of structures around the world showed that some of the collapses directly resulted from the poor quality of the concrete. The lesson learned from these tragedies is that guaranteeing high quality of concrete is one of the most important factors ensuring the safety of the reinforced concrete structure. In order to ensure high quality of concrete, a new method for analyzing and evaluating the concrete production process is called for. In this paper, the indices of fit and stable degree are proposed as basis to evaluate the fitness and stability of concrete’s compressive strength. These two indices are combined to define and evaluate the quality index of the compressive strength of concrete. Prin-ciples of statistics are used to derive the best estimators of these indices. Based on the outcome of the study, a concrete compres-sive strength quality control chart is proposed as a tool to help the evaluation process. Finally, a new evaluation procedure to assess the quality control capability of the individual concrete manufacturer is also proposed.

关键词： Quality index of concrete the best estimators Quality control chart Evaluation criteria Fit degree of compressive strength of concrete Stable degree of compressive degree of concrete

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