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Effect of Mineral Admixtures on Durability of Concrete Structure Subjected to Alkaline Saline Corrosions

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Abstract:

Effect of a combination of alkali ions, sulfate ion and chloride ion on durability of concrete structures was analyzed, and the effect of different mineral admixtures on deterioration caused by Cl- penetration, sulfate attack and alkali-silica reaction was investigated. It is shown from wetting-drying test that sulfate attack on concrete was greatly relieved in high Cl- concentration solution, but diffusion test showed that Cl- diffusion was accelerated by SO4 2- ion existence as SO4 2- may incorporate with aluminum phase prior to Cl- ion. Replacement of cement with mineral admixtures such as ground blast furnace slag (SL) and metalaolin (MK) were beneficial for absorption of Cl- ion penetrated into paste, while ASTM C441 showed that fly ash (FA), metakaolin and natural zeolite (NZ) exhibited effectiveness in controlling Alkali-silica reaction (ASR).

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Periodical:

Key Engineering Materials (Volumes 302-303)

Pages:

68-72

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.302-303.68

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Online since:

January 2006

Authors:

Quan Lin Niu, Nai Qian Feng

Keywords:

Alkaline Saline Corrosion, Durability, Mineral Admixture

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

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