英文学术报告范.pptx

,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious Composites,Layout,Background,Experimental Program,Experimental Results,C,omparison 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,For serial number from 1 to 5,the sand-binderratio was varied from 30 to 45%with other parameters constant.,For serial number from 6 to 9,the water-binder ratio was varied from 28 to 35%with other parameters constant.,For serial number from 10 to 13,the mineral admixture-binder ratio was varied from 50 to 80%with other parameters constant.,Experimental Program,Table 1.Specimen Information of Each Group,Test series,Specimen shape,Specimen size/mm,Specimen number,Suffix representation,UHTCC,Prism,4040160,9,a,p40u,Matrix,Prism,4040160,9,a,p40m,Results,C,omparison of compressive strength,Fig.1.Comparison of prism compressive strength between UHTCC and matrix,Results,C,omparison 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:,C,omparison 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.,C,omparison 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 behavior or for permitting its use in various structural applications.,Thank You,!,