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Corrosion of Steel Reinforcements in Fly Ash- and Kaolin-based Geopolymer Concrete Immersed in Distilled Water and ASTM Seawater

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Abst ract: Corrosion behavior of steel bar in fly ash- and kaolin-based geopolymer concrete immersed in aggressive media of distilled water and ASTM seawater was compared to Portland cement concrete having similar mix design. An accelerated corrosion by applying 3 V potential on the steel bar was peiformed to obtain reasonable test results in a relatively short time. The potential and pH of the immersing media were measm·ed from day 1 to day 10 and then plotted
on Poru·baix diagram to predict passivation or corrosion state. At day 10, steel bar in Portland cement concrete were in corroded state both in distilled water and seawater. The best corrosion pe1formance was for kaolin- based geopolymer concrete in which at day-10 the steel bar was passivated in both media. Steel bar in fly ash- based geopolymer concrete was passivated in distilled water but corroded in seawater.

Keywords: Corrosion potential, pH, geopolimer concrete, ASTM seawater, distilled water

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Informasi Detail

Judul Seri

Civil Engineering Dimension

No. Panggil

-

Penerbit

: ., 2013

Deskripsi Fisik

Civil Engineering Dimension, Vol. 15, No. 2, September 2013, 89-95

Bahasa

English

ISBN/ISSN

14109530

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

-

Subjek

TEKNIK SIPIL

Info Detail Spesifik

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Pernyataan Tanggungjawab

mutia/hasnidar

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