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The effects of fiber restraint on the shrinkage of cement composites



Title: The effects of fiber restraint on the shrinkage of cement composites
Author(s): John Bolander, Zhen Li
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 23
Language: English


Abstract: This work describes the development and application of irregular lattice models of cement composites at early ages. An important aspect of the model is the Voronoi diagram discretization of the material domain. The Voronoi diagram defines the lattice element connectivity and the scaling relations used for the element stiffness properties, in a manner that avoids the artificial heterogeneity generally exhibited by irregular lattices. Short fibers are discretely modeled within the three-dimensional domain, directly accounting for length and orientation efficiency of each fiber, as well as wall effects that can bias fiber orientations near the domain boundaries. The mortar phase is subjected to uniform shrinkage and the restraining effects of various fiber contents and orientations are compared with calculations based on elastic shear lag theory.


Online publication: 2004-03-25
Classification: Cracking
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.026