Freezing and Thawing Resistance of Condensed Silica Fume (Microsilica) Concrete Exposed to Deicing Chemicals

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Title: Freezing and Thawing Resistance of Condensed Silica Fume (Microsilica) Concrete Exposed to Deicing Chemicals

Author(s): Eigil V. Sorensen

Publication: Special Publication

Volume: 79

Issue:

Appears on pages(s): 709-718

Keywords: air entrainment; concretes; deicers; freeze-thaw durability; scaling; silica.

Date: 5/1/1983

Abstract:
Scale ctioning of concrete due to freezing and thawing action with the use of chemicals has become a severe concrete durability problem. The present paper reports results of freezing and thawing experiments performed to evaluate 4 the effect of microsilica (beneficiated condensed silica fume) addition to concrete in that respect. Tests performed using a fied method show that the drying rewetting standard and a modify history of the concrete prior to freezing and thawing has a sig-nificant influence on conventional concrete, whereas microsilica concrete is relatively unaffected. Air entrainment has a marked beneficial effect on both conventional and microsilica concrete, I although microsilica concrete with relatively low cement contents can be manufactured to be frost resistant without air entrain-ment.