REDUCTION OF CHLORIDE ION INGRESS INTO REINFORCED CONCRETE USING A HYDROPHOBIC ADDITIVE MATERIAL
DOI:
https://doi.org/10.11113/jt.v79.8857Keywords:
Corrosion attack, chloride ions, hydrophobic, infiltration, calcium stearateAbstract
Reinforced concrete structures located in areas near the coast are exposed to potential corrosion attack. Corrosion attack can occur because of the infiltration of chloride ions into concrete. At the initiation of the corrosion process, the load-carrying capacity of a reinforced concrete member will be affected negatively as a function of time. Infiltration of chloride ions into the concrete could be avoided by improving the micro-concrete properties. Enhancement of these properties can be achieved by use of an additive in the concrete. Calcium stearate is a hydrophobic material that can improve the properties of concrete. To determine the optimum contribution in concrete, laboratory experiments were conducted. Calcium stearate was added in varying contents of 0, 0.2, 0.9, and 1.9% of the cement weight. Four types of tests were performed to analyse the contribution of calcium stearate, namely the compressive strength test, absorption test, chloride ion infiltration test, and corrosion test. The results show that an optimum value of the compressive strength of concrete is obtained through the addition of calcium stearate. Besides that, the absorption, chloride ion infiltration, and corrosion value decrease significantly when a higher amount of calcium stearate is added to the concrete. Â
References
Kahyaoglu, H. A, M. Erbil, B. Yazici, and A. B. Yilmaz. 2002. Corrosion of Reinforcing Steel in Concrete Immersed in Chloride Solution and the Effects of Detergent Additions on Diffusion and Concrete Porosity. Turkish Journal of Chemistry. 26(5): 759-769.
Thomas, J. and H. Jennings. 2014. The Science of Concrete. Monograph, Northwestern University, Evanston, IL.
Broomfield, J. P. 1997. Corrosion of Steel in Concrete. London & New York: E & FN Spon.
Bilcik, J. and I. Holly. 2013. Effect of Reinforcement Corrosion on Bond Behavior. Procedia Engineering. 65: 248-253.
Darmawan, M. S. 2009. Pitting Corrosion Model for Partial Prestressed Concrete (PC) Structures in a Chloride Environment. IPTEK, The Journal of Technology and Science. 20(3): 109-114.
Rani, B. E. A. and B. B. J. Basu. 2012. Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overview. International Journal of Corrosion. 2012: 1-16.
Diab, A. M., H. E. Elyamany, and A. E. M. Abd Elmoty. 2011. Effect of Mix Proportions, Seawater Curing Medium and Applied Voltages on Corrosion Resistance of Concrete Incorporating Mineral Admixtures. Alexandria Engineering Journal. 50(1): 65-78.
Khaled, K. F. 2010. Studies of Iron Corrosion Inhibition Using Chemical, Electrochemical and Computer Simulation Techniques. Electrochimica Acta. 55(22): 6523-6532.
Ababneh, A., M. Sheban, M. Abu-dalo, and S. Andreescu. 2009. Effect of Benzotriazole Derivatives on Steel Corrosion in Solution Simulated Carbonated Concrete. Jordan Journal of Civil Engineering. 3(1): 91-102.
Maryoto, A. 2017. Resistance of Concrete with Calcium Stearate Due to Chloride Attack Tested by Accelerated Corrosion. Proceeding, SCESCM. Procedia Engineering (under published process).
BSN. Standar Nasional Indonsia, SNI 03-2834-2000. 2000. Tata Cara Pembuatan Rencana Campuran Beton Normal. Indonesia.
DPU. Standard SK SNI S-36-1990-03. 1990. Spesifikasi Beton Bertulang Kedap Air. Bandung, Indonesia.
Nuralinah, D. 2012. Laboratory Test and Numerical Analysis of Chloride Ingress into Concrete Subjected into Airborne Salt. Dissertation, Nagaoka University of Technology, Japan.
Maryoto, A. 2015. Improving Microstructures of Concrete Using Ca(C18H35O2)2. Procedia Engineering. 125: 631-637.
Cellat, K., Beyhan, B., kazanci, B., konuklu, Y., and Paksoy, H. 2017. Direct Incorporation of Butyl Stearate as Phase Change Material into Concrte for Energy Saving in Building. Journal of Clean Energy Technologies. 5(1). (in press).
Geetha, A., and Perumal, P., 2011. Chemical Reaction of Waterproofing Admixtures on the Corrosion Behaviour of Reinforced Cement Concrete. Asian Journal of Chemistry. 23(11): 5145-5148.
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