CORROSION ANALYSIS OF PRESTRESSED STEEL STRANDS EMBEDDED IN DUCT GROUT FROM AN OFFSHORE BRIDGE

Jiang Kun; Lu Xinying

doi:10.13204/j.gyjz201312022

Volume 43 Issue 12

Dec. 2014

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Jiang Kun, Lu Xinying. CORROSION ANALYSIS OF PRESTRESSED STEEL STRANDS EMBEDDED IN DUCT GROUT FROM AN OFFSHORE BRIDGE[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(12): 119-123. doi: 10.13204/j.gyjz201312022

Citation:

Jiang Kun, Lu Xinying. CORROSION ANALYSIS OF PRESTRESSED STEEL STRANDS EMBEDDED IN DUCT GROUT FROM AN OFFSHORE BRIDGE[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(12): 119-123. doi: 10.13204/j.gyjz201312022

Jiang Kun, Lu Xinying. CORROSION ANALYSIS OF PRESTRESSED STEEL STRANDS EMBEDDED IN DUCT GROUT FROM AN OFFSHORE BRIDGE[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(12): 119-123. doi: 10.13204/j.gyjz201312022

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CORROSION ANALYSIS OF PRESTRESSED STEEL STRANDS EMBEDDED IN DUCT GROUT FROM AN OFFSHORE BRIDGE

doi: 10.13204/j.gyjz201312022

1.
Department of Civil Engineering,Tsinghua University,Beijing 100084,China

Received Date: 2012-12-11
Publish Date: 2013-12-20

Abstract

Abstract

It was found that the strands embedded in duct grout of box grider in the mid-span had corroded when an offshore bridge located in Jiaozhou Bay was demolished. The scanning electron microscope，energy spectrum，X-ray diffraction and Ｒaman spectrum were used to analyze the morphology，element distribution and phases composition of rust samples. The results showed that the steel strand exhibited apparent corrosion pits，and in the rust layer ferrum, oxygen，chlorine，sulfur，calcium, silicon and other elements were found. The corrosion products mainly consisted of goethite，hematite，lepidocrocite，magnetite，calcium carbonate，little ferric sulphate and akageneite. There exist some differences in different locations of the rust layer.
- steel strand,
- grout,
- corrosion,
- rust layer

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References(17)

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