Effect of Metakaolin-Based Modifier on the Permeability of Concrete Structure in the Marine Environment

Abstract:

Corrosion of the steel reinforcement in the concrete structure caused by chloride ion penetration becomes more serious in the marine environment. Metakaolin has been widely used in the concrete structure to improve the strength and durability. The combination of metakaolin (MK) and fine fly ash (FA) was studied in the article and the penetration behavior of concrete with various contents of metakaolin-based modifier is investigated. The penetration resistance of concrete was tested in combination of electric flux test. The improving mechanism was studied with mercury intrusion porosimetry analysis (MIP). The experiment results indicate that metakaolin-based modifier improved the penetration resistance of concrete obviously. The combination of fine fly ash weakened the water sucking action of metakaolin and preserved the working performance of concrete. The pore size distribution of concrete containing metakaolin-based modifier has been optimized to improve the microstructure and enhance the penetration resistance of concrete.

• Periodical: Applied Mechanics and Materials (Volumes 438-439)
• Pages: 117-120
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.438-439.117
• Online since: October 2013
• Authors: Jun Tao Ma, Liang Yan, Yu Ping Tong, Hui Xian Wang
• Keywords: Fly Ash (FA), Metakaolin (MK), Penetration Resistance, Pore Structure

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