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The effect of cylindrical specimen size on the compressive strength of concrete

机译：圆柱试样尺寸对混凝土抗压强度的影响

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摘要

In this study, the influence of size and capping type of cylindrical specimens on compressive strength of concrete is investigated. For this purpose, eight series of concrete mixtures were designed to have water/cement ratios of 37%, 42%, 47%, 48%, 55%, 62%, 71% and 77% (by volume). Three hundred and eighty-four cylindrical specimens having dimensions of 150/300 and 120/200 mm were casted. At the end of 28-day standard curing period, the uniaxial compressive strength of capped and uncapped specimens was determined. Cement, gypsum and sulphur are used as capping materials. The results of the experimental study reveal that the suitable average conversion factor (the ratio of compressive strength of 100/200 mm cylinder to 150/300 mm cylinder—f_(c100)/f_(c150)) can be taken as 103%. Linear and nonlinear regression analyses were employed between f_(c100) and f_(c150). Linear and nonlinear regression analyses exhibited better performance.
机译：在这项研究中，研究了圆柱形试样的尺寸和封盖类型对混凝土抗压强度的影响。为此目的，设计了八个系列的混凝土混合物，以具有37％，42％，47％，48％，55％，62％，71％和77％（按体积计）的水/水泥比率。铸造了尺寸为150/300和120/200 mm的384个圆柱试样。在标准的28天固化期结束时，确定有盖和无盖标本的单轴抗压强度。水泥，石膏和硫磺用作封盖材料。实验研究的结果表明，合适的平均转化率（100/200 mm圆柱体与150/300 mm圆柱体的抗压强度之比-f_（c100）/ f_（c150））可取为103％。在f_（c100）和f_（c150）之间进行了线性和非线性回归分析。线性和非线性回归分析显示出更好的性能。

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