Characterising the time-dependant behaviour on the single fibre level of SHCC: Part 2: The rate effects on fibre pull-out tests

• Published in: Cement and concrete research Vol. 39; no. 9; pp. 787 - 797
• Main Authors: Boshoff, William P., Mechtcherine, Viktor, van Zijl, Gideon P.A.G.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2009; Elsevier
• Subjects: Applied sciences; Buildings. Public works; Concretes. Mortars. Grouts; Exact sciences and technology; Fibre reinforced concrete (including asbestos cement); Fibre reinforcement; Materials; Pull-out strength; Rate effects; SHCC; Tensile properties; Rate effects; SHCC; Pull-out strength; Tensile properties; Fibre reinforcement; Pull out resistance; Creep; Construction materials; Fiber reinforced material; Experimental device; Experimental study; Modeling; Composite material; Tensile strength; Characterization; Time dependence; Pull out test; Hardened cement paste; Concrete; Behavior
• ISSN: 0008-8846; 1873-3948
• DOI: 10.1016/j.cemconres.2009.06.006

This paper is the second part of a two paper series about the time-dependant behaviour of Strain Hardening Cement-based Composite (SHCC) on the single fibre level. Having dealt with mechanisms of creep in SHCC in the first part, this paper reports single fibre pull-out tests that were done to investigate the effect of the pull-out rate on the mechanical response of the interface between the fibre and the matrix. It was found that not only the pull-out resistance increased with an increase of the pull-out rate but the probability of fibre rupture during pull-out as well. Another important finding was that the interfacial shear resistance and slip-hardening coefficient are not only dependant on the pull-out rate, but also the embedment length.