Title: Effects of Shrinkage-Reducing Admixtures on Restrained Shrinkage Cracking of Concrete

Author(s): S. P. Shh, M. E. Krguller, and M. Sarigaphuti

Publication: Materials Journal

Volume: 89

Issue: 3

Appears on pages(s): 289-295

Keywords: admixtures; compressive strength; cracking (fracturing); fibers; metal fibers; polypropylene; porosity; reinforced concrete; shrinkage; welded wire fabric; Materials Research

DOI: 10.14359/2593

Date: 5/1/1992

Abstract:
Presents a study of the efficiency of shrinkage-reducing admixture (SRA) in controlling restrained shrinkage cracking of concrete. Three different types and amounts of SRA were used. A free shrinkage test and a restrained shrinkage test (ring test) were performed. The test results of the SRA concretes were compared with concrete reinforced with steel, polypropylene fibers, and wire mesh. At the same time, using free shrinkage specimens, weight losses were measured. Pore-size distribution was determined and the flow rate of fresh concrete was also measured. The results show that the addition of SRA significantly reduces free shrinkage. The addition of shrinkage-reducing admixtures also caused a considerable reduction in crack width.