加气混凝土断裂能测定的尺寸效应

THE INFLUENCE OF SIZE ON MEASURING THE SPECIFIC FRACTURE ENERGY OF AAC

    摘要
  • 摘要: 在加气混凝土断裂参数的研究及实际工程应用中,尺寸效应是很受关注的。在本研究过程中,采用了RILEM推荐的试件,研究了试件尺寸(厚度及断裂韧带高度)对加气混凝土断裂能测定的影响。研究表明,对于试验中采用的加气混凝土而言,当试件厚度大于200mm及韧带高度大于130mm时,尺寸效应可基本忽略不计。该尺寸在实验室中是可以满足的。

     

    Abstract: In this paper the wedge-splitting specimens recommended by RILEM are used to determine the specific fracture energy Gf of AAC. The influence of the specimen's size is investigated and analyzed with the theory in fracture mechanics.According to the data such a conclusion can be drawn that if the specimen is thicker than 200mm and the ligament is higher than 130mm, the influence of size is negligible.

     

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