Experimental Study and Theoretical Models on Compressive Properties of Ultrahigh Toughness Cementitious Composites
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 10
Abstract
Ultrahigh toughness cementitious composite (UHTCC) is a new class of high performance fiber-reinforced cementitious composites which exhibits pseudostrain hardening and multiple cracking phenomena. The main objectives of this paper are to investigate the compressive properties of UHTCC and to develop the constitutive models to describe it. The complete study includes an experimental phase and an analytical phase. In the experimental phase, the stress-strain curves were directly obtained, and the compressive parameters, i.e., strength, average strain at maximum stress, elastic modulus, and Poisson’s ratio, were calculated. The relationships of compressive parameters as a function of compressive strength were proposed according to the test results. The comparisons between UHTCC and matrix were carried out to understand the fiber effect on the compressive parameters. In the theoretical phase, comparisons were conducted between experimental results and existing models. As a result, two analytical relationships were proposed for design purpose under ultimate limit state conditions and nonlinear analysis of UHTCC structures. The research should lead to better understand the compressive properties of UHTCC and the mechanisms of fiber reinforcement for UHTCC and to provide analysis models for design or analysis of UHTCC structural members.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. NNSFC50978041).
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 10 • October 2010
Pages: 1067 - 1077
Copyright
© 2010 ASCE.
History
Received: May 15, 2009
Accepted: Apr 12, 2010
Published online: Apr 15, 2010
Published in print: Oct 2010
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