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给出了基于荷载挠度全曲线的脆性指数B和基于断裂面的脆性指数R ,对不同材料组成的混凝土试验测定了这两种脆性和强度 ,比较了这两种脆性的相关性 ,指出了混凝土材料的脆性实质上是断裂面上的脆性指数R的变化 .通过掺入冶金集料改变断裂面的脆性指数R ,使混凝土的脆性减小并提高了混凝土的强度 .
The brittleness index B based on the full curve of load deflection and the brittleness index R based on the fracture surface are given. The two kinds of brittleness and strength are tested on the concrete made of different materials. The correlation between the two brittleness is compared. The brittleness of the material is essentially the change of the brittleness index R on the fracture surface.The brittleness index R of the fracture surface can be changed by incorporating the metallurgical aggregate to reduce the brittleness of the concrete and increase the strength of the concrete.