Ascending branch:c1c2
c3cc2(c30.2c20.8)
Strain hardening branch: c1pc2

Horizontal branch: c3pc c3cc2(c30.2c20.8)
Descending branch: c3pc
0.2c
Comparison of stress-strain curves
➢ 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
Results
Comparison of strain at peak stress
Fig. 3. Comparison of strain at peak stress between UHTCC and matrix
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Theoretical model
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
structural applications are limited
Experimental Program
Experimental Program
Results
Comparison of compressive strength
Fig. 1. Comparison of prism compressive strength between UHTCC and matrix
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.
A theoretical model is provide which is needed for modeling its mechanical behavior or for permitting its use in various structural applications.
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
Experimental Study on Compressive Properties of Ultrahigh Toughness Cementitious Composites
Layout
Background Experimental Program Experimental Results