Freezing and Thawing Resistance of Anti-Washout Concrete Under Water


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Title: Freezing and Thawing Resistance of Anti-Washout Concrete Under Water

Author(s): Takeshi Yamato, yukio Emoto, and Massashi Soeda

Publication: Special Publication

Volume: 126


Appears on pages(s): 169-184

Keywords: air entrainment; admixtures; compressive strength; porosity; freeze thaw durability; Materials Research

Date: 8/1/1991

Presents the results of laboratory studies conducted to determine freezing-and-thawing resistance of anti-washout concretes under water. Three anti-washout admixtures were used in these studies. The water-cement ratio was 0.45, and the sand-coarse aggregate ratio was 0.67. A number of test cylinders were made for testing in compression at 7 and 28 days, and test prisms were cast for determining their resistance to freeze-thaw cycles in accordance with ASTM C 666, Procedure A. The air-void parameters of the hardened concrete were determined on sawn sections. The pore-size distributions of the hardened concrete were measured by a mercury porosimeter. The test results have indicated that the anti-washout concrete having the same water-to-cement ratio and the same air content as the control concrete show poorer resistance to freezing and thawing than the control concrete without the anti-washout admixture.