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Investigation of concrete resistance to chlorides

Baby, Binil Tom (2014). Investigation of concrete resistance to chlorides. Bachelor of Engineering (4th Year Project) Thesis, Charles Darwin University.

Document type: Thesis
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Author Baby, Binil Tom
Title Investigation of concrete resistance to chlorides
Institution Charles Darwin University
Publication Date 2014
Thesis Type Bachelor of Engineering (4th Year Project)
Subjects 0999 - Other Engineering
Abstract Chloride penetration is responsible for deterioration of concrete and the reinforcing steel rods. In this paper the deterioration of concrete due to chloride penetration was studied. As part of durability study, concrete with different water to cement (w/c) ratios were investigated by immersing specimens in natural sea water for periods up to 4 months. Immersed test specimens underwent uniaxial compressive test to ascertain concrete’s structural integrity and were inspected under electron microscope to determine the effect of various w/c concrete matrix under chloride attack. Test results indicate that concrete mix with high w/c were subjected to a greater gradient of chloride attack and exhibited the most reduction in compressive strength. Consequently it is recommended that suitable w/c mixture is required to improve concrete durability. The chloride resistance of the concrete depends on the permeability of the concrete since it governs the rate of flow of a fluid or substance through the concrete media. A number of parameters can be changed to control the permeability of concrete, namely w/c which significantly determines the porosity and pore size distribution of the concrete.
Keyword concrete
reinforced steel
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Created: Mon, 15 Sep 2014, 14:09:48 CST