Effect of Corrosion Inhibitors in Limestone Cement

Evgenia Zacharopoulou, Aggeliki Zacharopoulou, Atteyeh Sayedalhosseini, George Batis, Sotirios Tsivilis

Department of Materials Science and Engineering, School of Chemical Engineering, National Technical University of Athens, Ath- ens, Greece.

DOI: 10.4236/msa.2013.412A003                

Abstract

In this paper examines the improving durability of different limestone cement and effects of the use of corrosion inhibitor. The target is to experimentally investigate the effect of different types of cement in corrosion of reinforcement in presents of corrosion inhibitors and without it. Three types of cement have been used: CEM II, LC1 and LC2. For this purpose constructed mortar specimens, containing 4 reinforcements, with or without corrosion inhibitors for each group, these exhibited to partial immersion in sodium chloride in 3.5% w.t NaCl solution. The methods, with which the corrosion of reinforcement in concrete was tested, were measurements of corrosion potential, corrosion current and mass loss of reinforcement. The mortars with CEM II cement have better durability than that with limestone cement. The use of VpCI, Cyclohexylammonium benzoate, improves the corrosion protection of mortars with CEM II cement upper 50%. On the other hand, the addition of VpCI, Cyclohexylammonium benzoate, improves the corrosion protection of mortars with limestone cement 30% or lower.

Keywords

Concrete; Corrosion of Rebar; Limestone Cement

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	ASTM C595, “Standard Specification for Blended Cements.”
[2]	AASHTO M240, “Standard Specification for Blended Cement.”
[3]	V. C. Campiteli and M. C. Florindo, “The Influence of Limestone Additions on Optimum Sulfur Trioxide Content in Portland Cements,” In: P. Klieger and R. D Hooton, Eds. Carbonate Additions to Cement, ASTM STP 1064, American Society for Testing and Materials, Philadelphia, 1990, pp. 30-40.
[4]	D. K. Yfantis, “Materials—Corrosion and Protection,” Edition NTUA, Athens, 2000.
[5]	K. Sotiriadis, E. Nikolipoulou and S. Tsivilis, “Sulfate Resistance of Limestone Cement Concrete Exposed to Combined Chloride and Sulfate Environment at Low Temperature,” Cement and Concrete Composites, Vol. 34, No. 8, 2012, pp. 903-910.
[6]	G. Batis, K. K. Sideris and P. Pantazopoulou, “Influence of Calcium Nitrite Inhibitor on the Durability of Mortars under Contaminated Chloride and Sulphate Environments,” Anti-Corrosion Methods and Materials, Vol. 51 No. 2, 2004, pp. 112-120. http://dx.doi.org/10.1108/00035590410523201
[7]	S. Tsivilis, E. Chaniotakis, G. Kakali and G. Batis, “An Analysis of the Properties of Portland Limestone Cements and Concrete,” Cement and Concrete Composites, Vol. 24, No. 3, 2002, pp. 371-378.
[8]	S. Tsivilis, G. Batis, E. Chaniotakis, G. Grigoriadis and D. Theodossis, “Properties and Behavior of Limestone Cement Concrete and Mortar,” Cement and Concrete Research, Vol. 30, No. 10, 2000, pp. 1679-1683. http://dx.doi.org/10.1016/S0008-8846(00)00372-0
[9]	M. C. Brown, “Assessment of Commercial Corrosion Inhibiting Admixtures for Reinforced Concrete,” Virginia Polytechnic Institute, Blacksburg, 1999.
[10]	G. Batis, N. Kouloumbi and P. Pantazopoulou, “Protection of Reinforced Concrete by Coatings and Corrosion Inhibitors,” Pigment and Resin Technology, Vol. 29, No. 3, 2000, pp. 159-163. http://dx.doi.org/10.1108/03699420010334312
[11]	“Carbonation of Concrete,” Concrete Experts International, Denmark, 2002.
[12]	P. Turker and K. Erdogdu, “Effects of Limestone Addition on Microstructure and Hydration of Cements,” Proceedings of the Twenty Second International Conference on Cement Microscopy, Montreal, 29 April-4 May 2000.
[13]	R. D. Hooton, M. Nokken and M. D. A. T. Thomas, “Portland-Limestone Cement: State-of-the-Art Report and Gap Analysis for CSA A 3000,” Report SN3053, Cement Association of Canada, Toronto, 2007, 60 p. http://www.cement.org/bookstore/results_quicksearch.asp?store=main&id=&cat2ID=3& searchterm=SN3053
[14]	B. P. John, “Corrosion of Steel in Concrete,” E&FN Spon, London, 1997. http://dx.doi.org/10.4324/9780203414606
[15]	S. Tsivilis, E. Chaniotakis, G. Batis, C. Meletiou, V. Kasselouri, G. Kakali, A. Sakellariou, G. Pavlakis and C. Psimadas, “The Effect of Clinker and Lime Stone Quality on the Gas Permeability, Water Absorption and Pore Structure of Limestone Cement Concrete,” Cement and Concrete Composites, Vol. 21, No. 2, 1999, pp. 139-146.