Shape is an important physical property of aggregates. However, the large amount of work required to measure with precision the size of coarse aggregate and the lack of relevant tests obscure how the shape of the coarse aggregate affects the strength of concrete. In this work, granite coarse aggregate was first divided into flaky stone and massive stone by manual screening. Next, the coarse aggregate was selected at random for size and volume measurements to obtain and analyze the aggregate shape parameters such as sphericity and flatness. Based on the selected aggregate, three aggregate combinations were designed according to the content of flaky stone. Finally, we measured the compressive strength and splitting tensile strength of hydraulic concrete (7, 28, and 60 days) with water‐binder ratios of 0.33, 0.41, and 0.5. The results show that the three aggregates clearly differ in shape, and the measured compressive strengths and splitting tensile strengths of the concrete with water‐binder ratios of 0.41 and 0.5 are similar. However, the compressive strength of the concrete with water‐binder ratio of 0.33 is significantly correlated with the three selected aggregate combinations.

中文翻译：

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粗骨料形状对水工混凝土强度的影响

形状是骨料的重要物理性质。但是，要精确测量粗骨料的尺寸需要大量的工作，而缺乏相关的测试，使这种粗骨料的形状如何影响混凝土的强度变得难以理解。在这项工作中，首先通过人工筛选将花岗岩粗骨料分为片状石料和块状石料。接下来，随机选择粗骨料进行尺寸和体积测量，以获得并分析骨料形状参数，例如球形度和平坦度。根据所选骨料，根据片状石材的含量设计了三种骨料组合。最后，我们测量了水胶比为0.33、0.41和0.5的水工混凝土（7、28和60天）的抗压强度和抗拉强度。结果表明，三种骨料的形状明显不同，水灰比为0.41和0.5的混凝土测得的抗压强度和劈裂抗拉强度相似。但是，水粘结比为0.33的混凝土的抗压强度与所选的三种骨料组合显着相关。