e-glass vinyl ester composite for infrastructure  

Posting by alex stuart on April 17, 2008 at 14:36:05.

Hi material experts,

I have a question related to using e-glass vinyl ester composites for infrastructure, e.g. bridge decks, sluices, road decks, internal reinforcing bars, component for suspension brige replacements. What's the effect of a bending stress of pultruded frp combined with hygrothermal effects like adsorption, absorption of water and alkaline solution? Is there any useful model describing the creep as a function of simultaneous load with chemicals uptake?

Or what sort of experiment is adviced to generate a flexural mode of sustained loading is proposed to assess the combined effect of flexural load and moisture/alkaline diffusion?



          follow up posts
    On 04/17/2008 frank posts: know that for steel reinforcements or steel structures, such as oil platforms, normally cathodic protection is applied.

    Cathodic protection (CP) prevents corrosion of a metal surface by making the metal surface the cathode of an electro chemical cell.

    It is widely applied and rather succesful method used to protect metal pipeline, pillars, and other infrastructure from corrosion (chemical attack) with or without mechanical stress applied to the system. Cathodic protection systems are most commonly used to protect steel, water/fuel pipelines and storage tanks; steel pier piles, ships, offshore oil platforms and onshore oil well casings.

    From a hydrogen diffusion point of view, an improperly performed cathodic solution, leads to the production of molecular hydrogen, wich gets rather easiliy adsorbed on the metal surface. The subsequent absorption, diffusion, causes embrittlement of the metal.

    What do glass reinforced epoxy composites add, besides the absence of hydrogen chemical and stress corrosion degradation?
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