普通混凝土在外荷载作用下,试件往往在粗集料——水泥石界面处首先破坏。凡是能加强粗集料——水泥石界面的粘结力及能增加它们之间的粘结面积的一切措施,都可以认为是提高普通混凝土强度的重要手段。如减小粗集料的粒径,增加其与水泥石的粘结面积,减小粗集料下的水囊尺寸、数量及粗集料表面的水膜层厚度、增加粗集料表面的粗糙程度等。本文旨在研究卵石混凝土中石子最大粒径对混凝土强度的影响。试验结果不仅又一次证实了在普通混凝土中,粗集料 Normal concrete under the action of external loads, specimens are often first destroyed at the rough aggregate-cement interface. Any measure that can strengthen the coarse aggregate-cement interface bond and increase the bond area between them can all be considered as an important means to increase the strength of ordinary concrete. Such as reducing the size of coarse aggregate, increasing its bonding area with cement, reducing the size and number of water sac under the coarse aggregate, and the thickness of water film on the surface of coarse aggregate, and increasing the rough surface of coarse aggregate. Degree and so on. This paper aims to study the effect of the maximum particle size of gravel concrete on the strength of concrete. The test results not only confirm once again that in ordinary concrete, coarse aggregate