英文学术报告范例

Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious Composites Layoutn Backgroundn Experimental Programn Experimental Results Comparison of compressive strength between UHTCC and matrix Comparison of strain at peak stress between UHTCC and matrix Backgroundn Numbers of studies carried out permeability and carbonation properties tensile and bending properties freeze-thaw propertiesn no uniform test available for the compressive propertiesn structural applications are limited Experimental ProgramFor 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 ProgramTable 1. Specimen Information of Each GroupTest series Specimen shape Specimen size/mm Specimen number Suffix representationUHTCC Prism 40 40 160 9a p40uMatrix Prism 40 40 160 9a p40m ResultsComparison of compressive strength Fig. 1. Comparison of prism compressive strength between UH TCC and matrix ResultsComparison of strain at peak stress Fig. 3. Comparison of strain at peak stress between UH TCC and matrix Theoretical model Ascending branch: 1 2c c Strain hardening branch:Descending branch:Horizontal branch: 1 2c c c 3 23 2( 0.2 0.8 )c c cc c 3c c 3 23 2 ( 0.2 0.8 )c c cc c 3c c 0.2 c Comparison of stress-strain curvesn The chart shows the comparison between the predictions and the test data of UH TCC n 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 Conclusionsn The prism compressive strength decreases because of the fiber addition.n The strain at peak stress is larger than that of matrix because of the fiber additionn A theoretical model is provide which is needed for modeling its mechanical behavior or for permitting its use in various structural applications. Thank You !