Durability of Concrete Containing a Shrinkage-Reducing Admixture


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Title: Durability of Concrete Containing a Shrinkage-Reducing Admixture

Author(s): M. Sugiyama, K. Tanaka, M. Sakuta, and T. Urano

Publication: Special Publication

Volume: 100


Appears on pages(s): 1103-1120

Keywords: admixtures; concrete durability; drying shrinkage; shrinkage; freeze-thaw durability; moisture content; Materials Research

Date: 4/1/1987

The authors have carried out a series of studies on admixtures for reducing drying shrinkage of concrete. Regarding these admixtures, extremely interesting properties were found in a glycol ether derivative that is a water-insoluble, non-air-entraining surface active agent. The following points were revealed: 1) The water-insoluble glycol ether holds down air content of the concrete to less than about 1 percent. 2) Drying shrinkage of concrete is remarkably reduced when this glycol ether derivative is added to concrete. 3) Durability against freezing and thawing of concrete containing this glycol ether derivative is improved extremely by allowing the concrete to dry slightly prior to starting the freezing and thawing test. 4) Although the total volume of air is small, the number of air bubbles present is large because the diameters of the air bubbles are very small.