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Title: The Performance of Crystalline Hydrophobic in Wet Concrete Protection
Authors: Rahman, M
Chamberlain, D
Keywords: Crystallization hydrophobic;Impregnation;Concrete protection;Salt ponding;Chloride content;Durability;Concrete bridge
Issue Date: 2016
Citation: Journal of Materials in Civil Engineering, 2016
Abstract: Reflecting the need to protect concrete structures from de-icing salt and freeze-thaw loading, the study introduced in this paper springs from the uncertainty that exists in the benefit of in-situ performance Iso-butylsilane as a protection material. It is likely that environmental loading and internal moisture at the time of application are the main contributory factors for under performance. This paper deals with alternative materials, a high solids silane and an aqueous crystallization solution, operating moisture driven crystallization mechanism rather than demanding a dry application regime. The results demonstrated similar substantial reducing performance of both materials at 0-5% moisture on medium (C25:25 N/mm2) and high strength (C40:40N/mm2) concrete. There is greater take-up of protective materials for C25 concrete compared with C40 concrete, together with greater chloride reduction, indicating that the level of achieved dosing is a significant factor. The similarity between the absorption of water and the two protection materials relative to initial water content, points to a possible basis for predicting achievable dossing of surface applied protection materials. The crystallization material achieved greater application volume and chloride reduction than the silane material.
ISSN: 1943-5533
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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