英文学术报告范例.ppt

Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious Composites,Layout,Background Experimental Program Experimental Results Comparison of compressive strength between UHTCC and matrix Comparison of strain at peak stress between UHTCC and matrix A theoretical stress-strain curve model Conclusions,Background,Numbers of studies carried out permeability and carbonation properties tensile and bending properties freeze-thaw properties no uniform test available for the compressive properties structural applications are limited,Experimental Program,Experimental Program,Results Comparison of compressive strength,Fig. 1. Comparison of prism compressive strength between UHTCC and matrix,Results Comparison of strain at peak stress,Fig. 3. Comparison of strain at peak stress between UHTCC and matrix,Theoretical model,Ascending branch:,Strain hardening branch:,Descending branch:,Horizontal branch:,Comparison of stress-strain curves,The chart shows the comparison between the predictions and the test data of UHTCC The predicted curves are obtained by using the experimental strain value at peak stress instead of the fixed value of 0.002.,Comparison of compressive strength,Conclusions,The prism compressive strength decreases because of the fiber addition. The strain at peak stress is larger than that of matrix because of the fiber addition A theoretical model is provide which is needed for modeling its mechanical behavio