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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: Reduction of Autogenous Shrinkage in Cement Paste by IC Using Jute Fiber
Author(s): Mitsuo Ozawa and Hiroaki Morimoto
Publication: Special Publication
Appears on pages(s): 1-12
Keywords: Autogenous shrinkage strain, cement paste, internal curing, jute fiber
Abstract:Internal curing is an effective method of preventing autogenous shrinkage in early-age concrete. In this approach, water-retentive particles act as internal reservoirs to supply water to the surrounding cement paste matrix. The objective of this study was to determine how the early-age shrinkage behavior of cement-based materials is affected by the addition of saturated jute fiber under sealed conditions. The four cement-paste specimens with water-cement ratio of 0.25, and the individual jute fibers of 6 mm length. The fiber contents by volume were 0, 0.5, 1.0 and 2.0%, respectively. The straw-like structures of the jute fiber were observed in a scanning electron microscope photograph. Additions of 0.5% and 1.0% of jute fiber by volume of cement paste resulted in 12% and 36% reductions in autogenous shrinkage strain at a material age of 8 days, respectively. Additions of 0.5% and 1.0% of jute fiber by volume of cement paste resulted in 3% and 22% reductions in compressive strength at a material age of 8 days, respectively. The material segregation was observed in the cement paste with 2.0% of jute fiber by volume. These results indicate the suitability of jute fiber for an internal curing material.
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