Concrete compression is complex. Yet, understanding this behavior is indispensable for design. There are three main factors that affect concrete compression results: the specimen size, shape, and friction at its ends. These factors affect the observed phenomena, and they affect each other. This paper aims to review the current knowledge on concrete compression and the effect of size, shape and friction on it. Understanding their effects is essential for a safer design and more effective testing. Most of the advancements in this topic is old, with a few exceptions. So, this review highlights the gaps in knowledge, and reintroduces them once again. Concrete design codes should consider the size effect in calculations. Reducing friction is recommended to lower the strength variation. Reduced friction may also be used for testing smaller specimens more reliably. This leads to more accurate, and more economic concrete testing.

混凝土压缩是复杂的。但是，了解这种行为对于设计是必不可少的。影响混凝土压缩结果的三个主要因素是：试样的尺寸，形状和两端的摩擦力。这些因素影响观察到的现象，并且彼此影响。本文旨在回顾有关混凝土压缩的现有知识以及尺寸，形状和摩擦对其的影响。了解它们的影响对于更安全的设计和更有效的测试至关重要。除少数例外，该主题的大多数进步都是陈旧的。因此，本文将重点介绍知识方面的空白，并再次进行介绍。具体的设计规范应在计算中考虑尺寸影响。建议减少摩擦以降低强度变化。减小的摩擦也可用于更可靠地测试较小的样本。这导致更准确，更经济的混凝土测试。