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正交设计大量用于混凝土材料试验,在我国始于70年代末。从1981年本刊第4期首次发表应用正交设计优选混凝土干热养护的工艺参数及其配合比的试验成果以来,已发表这方面内容的研究报告或学术论文共约十余篇。特别在1986年9～10月本刊举办正交设计技术传授班以后,专业工作者应用正交设计的深度和广度向前推进了一大步。实践表明,正交设计在减少试验次数和科学地分析试验数据方面,越来越显示出它的优越性。为把正交设计的运用提高到一个新的水平,有必要就某些基本概念和运用技巧进一步明确和提高。为此,特选此文发表。该文作者在正交设计的理论和实践方面造诣较深。本文结合本刊已发表的部分实例与混凝土材料专业的特点,对以下几个方面:1.选因素、抓主要矛盾;2.混合水平分析的特点;3.试验误差及处理技巧等进行探讨和述评。本文引用的实例,取材于某些单位和个人的试验结果,作者已声明表示感谢。
Orthogonal design was used extensively for concrete material tests. It began in China in the late 1970s. Since the first publication of the 4th issue of the journal published in 1981 to optimize the process parameters and mix ratios of concrete dry heat conservation, more than ten research reports or academic papers have been published in this area. In particular, after the Orthogonal Design Technology Transfer Course was held in the Journal from September to October 1986, the depth and breadth of the application of orthogonal design for professional workers was a major step forward. Practice has shown that orthogonal design has increasingly demonstrated its superiority in reducing test times and scientifically analyzing test data. In order to raise the application of orthogonal design to a new level, it is necessary to further clarify and improve certain basic concepts and application techniques. For this reason, this article was published specially. The author of this article has a deep understanding of the theory and practice of orthogonal design. This article combines the characteristics of the concrete examples of concrete materials and concrete examples published in this journal, and includes the following aspects: 1. Selecting factors and grasping major contradictions; 2. Analyzing the characteristics of mixed level analysis; 3. Discussing experimental errors and processing techniques, etc. Commentary. The examples cited in this article are based on experimental results of certain units and individuals. The authors have stated their thanks.