1、Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious Composites 1 Layout nBackground nExperimental Program nExperimental Results Comparison of compressive strength between UHTCC and matrix Comparison of strain at peak stress between UHTCC and matrix n n A theoretical stre
2、ss-strain curve model A theoretical stress-strain curve model n n ConclusionsConclusions 2 Background nNumbers of studies carried out permeability and carbonation properties tensile and bending properties freeze-thaw properties nno uniform test available for the compressive properties n structural a
3、pplications are limited 3 Experimental Program 4 Experimental Program Table 1. Specimen Information of Each Group Test seriesSpecimen shape Specimen size/mm Specimen number Suffix representation UHTCC Prism40401609ap40u MatrixPrism40401609ap40m 5 Results Comparison of compressive strength Fig. 1. Co
4、mparison of prism compressive strength between UHTCC and matrix 6 Results Comparison of strain at peak stress Fig. 3. Comparison of strain at peak stress between UHTCC and matrix 7 Theoretical model Ascending branch: Strain hardening branch: Descending branch: Horizontal branch: 8 Comparison of stre
5、ss-strain curves nThe 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. 9 Comparison of compressive strength 10 Conclusions nThe prism compressive
6、 strength decreases because of the fiber addition. nThe strain at peak stress is larger than that of matrix because of the fiber addition nA theoretical model is provide which is needed for modeling its mechanical behavior or for permitting its use in various structural applications. 11 Thank You ! 12
