Effectiveness of permeability-reducing admixtures in marine concrete
Dao, Vinh, Dux, Peter, and Morris, Peter (2007) Effectiveness of permeability-reducing admixtures in marine concrete. In: Proceedings of Concrete under severe conditions - environment and loading CONSEC'07 (1), pp. 449-456. From: 5th International conference on concrete under severe conditions of environment and loading, 4-6 June 2007, Tours, France.
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The use of permeability-reducing admixtures is a potential solution to the chloride-induced corrosion of steel reinforcement, which is the main cause of deterioration of concrete structures exposed to coastal environments. This paper presents the results of an experimental investigation into the effectiveness of two typical commercially available permeability-reducing admixtures. Concrete specimens were exposed to a simulated coastal environment, and chloride concentration profiles after 28-day, 365-day, and 730-day exposures were determined by X-ray fluorescence spectrometry. The results suggested that the incorporation of the admixture characterised by hydrophobic and pore-blocking effects appeared to enhance considerably the concrete durability in respect of chloride-induced corrosion. The inclusion of the admixture characterised by crystallisation activity, however, seemed to have almost no detectable effect.
|Item Type:||Conference Item (Refereed Research Paper - E1)|
|Keywords:||corrosion; chloride-induced; admixtures|
|Date Deposited:||11 Jan 2010 23:47|
|FoR Codes:||09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 100%|
|SEO Codes:||87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 80%
96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961102 Physical and Chemical Conditions of Water in Coastal and Estuarine Environments @ 20%