Development of Shrinkage Resistant Cement-based Materials Using Fibers

doi:10.3850/978-981-08-7920-4_S3-M018-cd

Development of Shrinkage Resistant Cement-based Materials Using Fibers

Pedram Hamedanimojarrad, Georgius Adam, Abhi S. Ray, Kirk Vessalas and Paul S. Thomas

Centre for Built Infrastructure Research, Faculty of Engineering, University of Technology, Sydney, Australia.

ABSTRACT

Drying shrinkage is the major contributor to volume changes in normal strength concrete. Several classes of shrinkage compensating admixtures are known to the concrete industry. This study deals with the literature review and categorization of different classes of shrinkage reducing fibers, especially polyethylene fibers, with the objective of introducing new types of shrinkage reducing fiber. In this investigation a special type of hydrophobic polyethylene minifibers has been used in different dosages in mortar samples. The experimental results on drying shrinkage as well as on several other properties are reported. The hydrophobic minifibers showed remarkable improvement in shrinkage reduction even at very low concentrations (0.1% of cement).

Keywords: Drying shrinkage, Mortar, Minifiber, Hydrophobic, and Expansive admixture.

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