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首页> 美国政府科技报告 >Effect of size, shape and end condition of test specimen on compressive strength of high-strength concrete.
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Effect of size, shape and end condition of test specimen on compressive strength of high-strength concrete.

机译：试件尺寸，形状和终止条件对高强混凝土抗压强度的影响。

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Compressive testing of high-strength concrete is a critical issue on which no consensus has yet been reached. Among the many factors that are mostly under discussion are the size, shape and end condition of test specimens for high-strength concrete. The experimental program described herein was designed primarily to investigate the effects and the possible interactions of the above-mentioned factors on compressive strength of high-strength concrete. Three levels of specimen sizes, three methods of specimen capping (mould surface, sulphur capping, grinding) and four grades of concrete strengths were selected. A 3x3x4 factorial experimental design was adopted with two replicates (each an average of three specimens), giving a total of 72 test values (216 specimen). The strictest possible precautions were taken to ensure that all other factors which would conceivably effect the compressive strength were held constant. The statistical methods utilized included analyses of variance, linear regressions and pairwise comparisons of factor main effects.

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