Title:
Ultimate Drying Shrinkage of Concrete--Influence of Major Parameters
Author(s):
Will Hansen and Jamal A. Almudaiheem
Publication:
Materials Journal
Volume:
84
Issue:
3
Appears on pages(s):
217-223
Keywords:
aggregates; concrete; curing; drying shrinkage; humidity; hydration; modulus of elasticity; shrinkage; water-cement ratio; Materials Research
DOI:
10.14359/1954
Date:
5/1/1987
Abstract:
The effect of aggregate content and elastic modulus on ultimate drying shrinkage of concrete was investigated. A shrinkage model developed by one of the authors that includes these parameters was tested. The model showed excellent agreement with experimental results. Further, the effect of water-cement ratio (w/c), curing time, and aggregate content on the drying shrinkage versus relative humidity curves in the relative humidity range of to 100 percent was investigated for miniature paste and mortar specimens. For these specimens the relative humidity correction factor was found to be independent of w/c ratio, curing time, and aggregate content in the relative humidity range of 11 to 100 percent and was best described by two linear relationships. The two relationships for the relative humidity correction factor in the relative humidity range of 11 to 50 percent and 50 to 100 percent were characterized by different slopes. Using the relative humidity correction factor and the shrinkage model, ultimate shrinkage of concrete can be estimated at any relative humidity between 11 and 100 percent.