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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Tailoring a New Restrained Shrinkage Test for Fiber Reinforced Concrete
Author(s): Adriano Reggia, Fausto Minelli and Giovanni A. Plizzari
Publication: Special Publication
Appears on pages(s): 5.1-5.14
Keywords: cracking development; degree of restraint; fiber reinforced concrete; notched ring test; restrained shrinkage; ring test; shrinkage; shrinkage reducing admixture; time-to-cracking.
Abstract:The progress of concrete research during the last three decades has highlighted the possibility of
enhancing the properties of cement-based materials, such as compressive strength or workability of the fresh
mixes, as well as for other important properties like toughness, durability or volumetric stability. Among these,
the resistance to shrinkage cracking is gaining an increasing attention, due to its strict relation to durability. In
fact, shrinkage cracking occurs in all concrete structures when the free deformation of concrete is restrained.
The higher the shrinkage deformation and the degree of restraint, the higher the risk of cracking, for the same
Fiber Reinforced Concrete (FRC), now widely available into the market, allows for a better crack control due to
the higher post-cracking strength; the latter is related to the links provided by fibers between the crack faces.
However, shrinkage-cracking resistance should be determined with tailored methodologies measuring the crack
development under restrained shrinkage conditions.
The aim of this paper is a critical discussion on the current standard test procedures and, eventually, a proposal
for a novel and enhanced testing set-up for measuring the shrinkage-cracking resistance of FRC. The effects of
polymer fibers and Shrinkage Reducing Admixture (SRA) are discussed with reference to the time-to-cracking
and the crack width development.
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