In this study, the effect of cement content on concrete performance in corrosive environments is investigated on concrete mixtures having the same water/cement (w/c) ratio. Three w/c ratios (0.40, 0.45 and 0.50) were used and for each w/c ratio three mixtures were prepared with cement contents 350, 400 and 450 kg/m3. The compressive strength, electrical resistivity and chloride diffusivity of the samples without steel reinforcement were determined. In addition, the half-cell potential of samples with steel reinforcement in 5% NaCl solution was measured to evaluate the rebar corrosion. It is found that although w/c ratio is kept constant, strength increases and corrosion probability of steel reinforcements decreases when cement content in the mixture decreases from 450 to 350 kg/m3.
ACI 222R-01., (2201). Protection of Metals in Concrete Against Corrosion. ACI Manual of Concrete Practice., Part I.
Ahmad, S., (2003). Reinforcement Corrosion in Concrete Structures, Its Monitoring and Service Life Prediction - A Review. Cement & Concrete Composites., 25, 459–471.
ASTM C 1218-92., (1992). Standard Test Method for Water-Soluble Chloride in Mortar and Concrete.
ASTM C 876-91., (1999). Standard Test Method for Half-cell Potentials of Uncoated Reinforcing Steel in Concrete.
Bazant, Z., (1979). Physical Model for Steel Corrosion in Concrete Sea Structures Part Theory Part Application. J Struct Div Am Soc Civil Eng., 105 (6), 1137-1166.
BS: 1881: part 116., (1983). Methods for Determination of Compressive Strength of Concrete Cubes. British Standard Institution., London.
Kolias, S.; Georgiou, C., (2005). The Effect of Paste Volume and of Water Content on the Strength and Water Absorption of Concrete. Cement & Concrete Composites., 27, 211-216.
Leelalerkiet, V.; Kyung, J. W.; Ohtsu, M.; Yokota, M., (2004). Analysis of Half-Cell Potential Measurement for Corrosion of Reinforced Concrete. Construction and Building Materials., 18, 155-162.
NT Build 443., (1995). Accelerated Chloride Penetration., Nordtest Method NT Build 443.
Pal, S. C.; Mukherjee, A.; Pathak, S. R., (2002).
Corrosion Behavior of Reinforcement in Slag Concrete. ACI Material Journal., 6 (99), 521-527.
Polder, R. B.; Peelen, W. H. A., (2002). Characterization of Chloride Transport and Reinforcement Corrosion in Concrete Under Cyclic Wetting and Drying by Electrical Resistivity. Cement & Concrete Composites., 24, 427-435.
Poulsen, E., (1990). The Chloride Diffusion Characteristics of Concrete – Approximative Determination by Linear Regression Analysis. Nordic Concrete Research., 9,124–133.
Shi, C., (2004). Effect of Mixing Proportions of
Concrete on Its Electrical Conductivity and Rapid Chloride Permeability Test (ASTM C 1202 or ASSHTO T277) Results. Cement and Concrete Research., 34, 537-545.
Song, H. W.; Saraswathy, V., (2007). Corrosion Monitoring of Reinforced Concrete Structures – A Review. International Journal of Electrochemical Science., 2, 1-28.
Yiğiter, H.; Yazici, H.; Aydin, S., (2007). Effect of Cement Type, Water/cement Ratio and Cement Content on Sea Water Resistance of Concrete. Building and Environment., 42, 1770-1776.