The reduction phenomena of concrete compressive strength with the size of cylinders is very interesting, but till now an adequate analysis technique is not available. Based on the existing research results, the bigger the member size, the smaller the strength.…
The reduction phenomena of concrete compressive strength with the size of cylinders is very interesting, but till now an adequate analysis technique is not available. Based on the existing research results, the bigger the member size, the smaller the strength. However, real test results reveal that the reduction rate becomes blunt and there are considerable differences between size effect law and test results. The pmpose of this paper is to propose a model equation which can predict the compressive strength of nonstandard concrete cylinder specimens with varying height to diameter ratio. The effects of maxirmun aggregate size on the microcrack z.one are considered and the concept of characteristic length is newly introduced. Proposed models can be practically used to predict the compressive strength of various sized concrete cores sampled from existing structures.