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1、Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious CompositesLayoutnBackgroundnExperimental ProgramnExperimental ResultsComparison of compressive strength between UHTCC and matrixComparison of strain at peak stress between UHTCC and matrixn n A theoretical stress-strain
2、 curve model A theoretical stress-strain curve modeln nConclusionsConclusionsBackgroundnNumbers of studies carried outpermeability and carbonation propertiestensile and bending propertiesfreeze-thaw propertiesnno uniform test available for the compressive propertiesn structural applications are limi
3、tedExperimental ProgramExperimental ProgramTable 1.Specimen Information of Each GroupTable 1.Specimen Information of Each GroupTest seriesSpecimen shapeSpecimen size/mmSpecimen numberSuffix representationUHTCC Prism40401609ap40uMatrixPrism40401609ap40mResultsComparison of compressive strength Fig.1.
4、Comparison of prism compressive strength between UHTCC and matrixResultsComparison of strain at peak stress Fig.3.Comparison of strain at peak stress between UHTCC and matrixTheoretical modelAscending branch:Strain hardening branch:Descending branch:Horizontal branch:Comparison of stress-strain curv
5、esnThe chart shows the comparison between the predictions and the test data of UHTCC nThe predicted curves are obtained by using the experimental strain value at peak stress instead of the fixed value of 0.002.Comparison of compressive strengthConclusionsnThe prism compressive strength decreases because of the fiber addition.nThe strain at peak stress is larger than that of matrix because of the fiber additionnA theoretical model is provide which is needed for modeling its mechanical behavior or for permitting its use in various structural applications.Thank You!
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