The Effect of Caspian Sea Water on Corrosion Resistance and Compressive Strength of Reinforced Concrete Containing Different SiO2 Pozzolan


1 Department of Engineering, Damghan Branch, Islamic Azad University, Damghan, Iran

2 Civil Engineering Department, School of Engineering, Damghan University, Damghan, Iran


Many parameters are influenced by the diffusion of chloride on concrete in marine environments and these can affect concrete quality. In this study, the effect of water to cement ratio of 0.35, 0.40 and 0.45 on corrosion resistance and compressive strength of reinforced concrete was evaluated. Moreover, different percentages of micro silica (SiO2) including 5, 7.5 and 10% were utilized, in order to investigate the effect of pozzolanic materials on the corrosion of steel in concrete. Then cubic samples reinforced with steel bar spacing of 2.5, 5 and 7 cm from the cube surface were made and put in Caspian sea water for 5 months. During this period, corrosion potential of steel was measured by a calomel half cell (SCE). In order to finalize the evaluation of the mechanical strength of the samples, concrete pressure test was conducted and the result showed that after 40, 44 and 59 days for the bars with depth of 2.5, 5 and 7 cm, respectively and the samples prepared with water-cement ratio of 0.35, the corrosion potential was -350V versus SCE, while the compressive strength was approximately 450 kg/cm2. This result showed longer life span of this sample in comparison with other water-cement ratios. By adding micro silica to the samples up to 7.5%, the time for obtaining a corrosion potential of -350V, bars with depth of 2.5, 5 and 7 cm, was 43, 50 and 86 days, respectively, and the compressive strength of this sample was approximately 480 kg/cm2. Consequently, it is arguable that in order to achieve longer life span of corrosion and suitable compressive strength, the optimum ratio of water to cement should be 0.35 and the percentage of pozzolan SiO2 should be 7.5%.


1. Michel, A., Otieno, M., Stang, H. and Geiker, M.R., “Propagation of steel corrosion in concrete: Experimental and numerical investigations” Cement and Concrete Composites, Vol. 70, (2016), 171-182.
2. Gasratova, N.A. and Stareva, I.A., “The Study of Stress-Strain Reinforced Concrete Beam at Bending. The Analysis of Picture in the Presence of Prestressed Reinforcement” Journal of Engineering and Applied Sciences, Vol. 11, No. 6, (2016), 1300-1305.
3. Thrinath, G. and Kuma, P.S., “Eco-friendly Self-curing Concrete Incorporated with Polyethylene Glycol as Self-curing Agent” International Journal of Engineering-Transactions A: Basics, Vol. 30, No. 4, (2017), 473-480.
4. Tao, Z., MdKamrulHassan, Song, T.-Y. and Han, L.-H., “Experimental study on blind bolted connections to concrete-filled stainless steel columns” Journal of Constructional Steel Research, Vol. 128, (2017), 825–838.
5. Abdollahi, S., Ranjbar, M. and Ilbegyan, S., “Shear Capacity of Reinforced Concrete Flat Slabs Made with High-strength Concrete: A Numerical Study of the Effect of Size, Location, and Shape of the Opening” International Journal of Engineering-Transactions B: Applications, Vol. 30, No. 2, (2017), 162-170.
6. Zadeh, S.D., Lvov, G. and Kiahosseini, S., “A new numerical method for determination of effective elastic constants in a composite with cross-ply fibers” Вісник Національного технічного університету ХПІ. Серія: Динаміка і міцність машин, Vol. No. 58, (2014), 169-180.
7. Daryazadeh, S., Lvov, G.I. and Kiahosseini, S.R., “A numerical method of calculation of total stress in reinforced plates with pressurized hole” International Journal of Modelling and Simulation, Vol. 35, No. 1, (2015), 7-13.
8. Fooladi, S. and Kiahosseini, S.R., “Creation and investigation of chitin/HA double-layer coatings on AZ91 magnesium alloy by dipping method” Journal of Materials Research, Article inpress, 1-10.
9. Sharma, S., Gupta, T. and Sharma, R.K., “Assessment of Mechanical Properties of Concrete Containing Granite Slurry Waste” International Journal of Engineering-TRANSACTIONS B: Applications, Vol. 29, No. 5, (2016), 599-605.
10. Sanza, B., Planasa, J. and Sancho, J.M., “A closer look to the mechanical behavior of the oxide layer in concrete reinforcement corrosion” International Journal of Solids and Structures, Vol. 62, (2015), 256–268.
11. Zhao, Y., Zhang, X., Ding, H. and Jin, W., “Non-uniform distribution of a corrosion layer at a steel/concrete interface described by a Gaussian model” Corrosion Science, Vol. 112, (2016), 1–12.
12. Lu, Z.-H., Ou, Y.-B., Zhao, Y.-G. and Li, C.-Q., “Investigation of corrosion of steel stirrups in reinforced concrete structures” Construction and Building Materials, Vol. 127, (2016), 293–305.
13. Khaloo, A. and Azizi, K., “Effects of Microsilica Percentage Amount on Structure and Compressive Strength of Reactive Powder Concrete (RPC” Journal of Engineering and Applied Sciences, Vol. 11, No. 7, (2016), 1502-1507.
14. Hong, S., Wiggenhauser, H., Helmerich, R., Dong, B., Dong, P. and Xing, F., “Long-term monitoring of reinforcement corrosion in concrete using ground penetrating radar” Corrosion Science, Vol. 114, (2017), 123-132.
15. Ou, Y.-C. and Nguyen, N.D., “Influences of location of reinforcement corrosion on seismic performance of corroded reinforced concrete beams” Engineering Structures, Vol. 126, (2016), 210–223.
16. Babaee, M. and A.Caste, “Chloride-induced corrosion of reinforcement in low-calcium fly ash-based geopolymer concrete” Cement and Concrete Research, Vol. 88, (2016), 96–107.
17. Ali, M.S., Ji, C. and Mirza, M.S., “Durable design of reinforced concrete elements against corrosion” Construction and Building Materials, Vol. 93, (2015), 317–325.
18. Shaheen, F. and Pradhan, B., “Influence of sulfate ion and associated cation type on steel reinforcement corrosion in concrete powder aqueous solution in the presence of chloride ions” Cement and Concrete Research, Vol. 91, (2017), 73-86.
19. Dong, W., Ye, J., Murakami, Y., Oshita, H., Suzuki, S. and Tsutsumi, T., “Residual load capacity of corroded reinforced concrete beam undergoing bond failure” Engineering Structures, Vol. 127, (2016), 159–171.
20. Sun, X., Jiang, G., Bond, P.L., Keller, J. and Yuan, Z., “A novel and simple treatment for control of sulfide induced sewer concrete corrosion using free nitrous acid” Water Research, Vol. 70, (2015), 279-287.
21. Sun, X., Jiang, G., Bond, P.L., Wells, T. and Keller, J., “A rapid, non-destructive methodology to monitor activity of sulfide-induced corrosion of concrete based on H2S uptake rate” water research, Vol. 59, (2014), 229-238.
22. Sun, X., Jiang, G., Chiu, T.H., Zhou, M., Keller, J. and Bond, P.L., “Effects of surface washing on the mitigation of concrete corrosion under sewer conditions” Cement and Concrete Composites, Vol. 68, (2016), 88-95.
23. Karar, N. and Singh, S.K., “Understanding corrosion in steel reinforced concrete structures: A limited study using TOF-SIMS” Vaccum, Vol. 121, No. (2015), 5-8.
24. Sosa, M., Pérez-López, T., Reyes, J., Corvo, F., Camacho-Chab, R., Quintana, P. and Aguilar, D., “Influence of the Marine Environment on Reinforced Concrete Degradation Depending on Exposure Conditions ” International Journal of  Electrochemical Science Vol. 6, (2011), 6300 - 6318.
25. Berrocal, C.G., Lundgren, K. and Löfgren, I., “Corrosion of steel bars embedded in fibre reinforced concrete under chloride attack: State of the art” Cement and Concrete Research, Vol. 80, (2016), 69–85.
26. Zhu, X., Zi, G., Lee, W., Kim, S. and Kong, J., “Probabilistic analysis of reinforcement corrosion due to the combined action of carbonation and chloride ingress in concrete” Construction and Building Materials, Vol. 124, (2016), 667-680.
27. Ferrer, B., Bogas, J.A. and Real, S., “Service life of structural lightweight aggregate concrete under carbonation-induced corrosion” Construction and Building Materials, Vol. 120, (2016), 161–171.
28. Aguirre-Guerrero, A.M., Robayo-Salazar, R.A. and de Gutiérrez, R.M., “A novel geopolymer application: Coatings to protect reinforced concrete against corrosion” Applied Clay Science, Vol. 135, (2017), 437-446.
29. Hou, C.-C., Han, L.-H., Wang, Q.-L. and Hou, C., “Flexural behavior of circular concrete filled steel tubes (CFST) under sustained load and chloride corrosion” Thin-Walled Structures, Vol. 107, (2016), 182–196.
30. Etxeberria, M., Gonzalez-Corominas, A. and Pardo, P., “nfluence of seawater and blast furnace cement employment on recycled aggregate concretes’ properties” Construction and Building Materials, Vol. 115, (2016), 496–505.
31. Gao, Z., Liang, R.Y. and Patnaik, A.K., “Effects of sustained loading and pre-existing cracks on corrosion behavior of reinforced concrete slabs” Construction and Building Materials, Vol. 124, (2016), 776–785.
32. Olutoge, F.A. and Amusan, G.M., “The Effect of Sea Water on Compressive Strength of Concrete” International Journal of Engineering Science Invention, Vol. 3, No. 7, (2014),
33. Aguirre-Guerrero, A.M., Mejía-de-Gutiérrez, R. and Montês-Correia, M.J.R., “Corrosion performance of blended concretes exposed to different aggressive environments” Construction and Building Materials, Vol. 121, (2016), 704–716.
34. Sayadi, H.A., Rashti, A.A.p.N.G. and Far, H.R.R., “A Review on Corrosion of Reinforcing steel in Concrete Structures Located on the Southern Coast of Iran” The Caspian Sea Journal, Vol. 10, No. 1, (2016), 61-66.
35. Davis, J.R., "Corrosion: Understanding the basics" ASM International, (2000).
36. Maruthapandian, V., Saraswathy, V. and Muralidharan, S., “Development of solid state embeddable reference electrode for corrosion monitoring of steel in reinforced concrete structures” Cement and Concrete Composites, Vol. 74, (2016), 100-108.
37. Patil, S., Karkare, B. and Goyal, S., “Acoustic emission vis-à-vis electrochemical techniques for corrosion monitoring of reinforced concrete element” Construction and Building Materials, Vol. 68, (2014), 326–332.
38. Hackl, J. and Kohler, J., “Reliability assessment of deteriorating reinforced concrete structures by representing the coupled effect of corrosion initiation and progression by Bayesian networks” Structural Safety, Vol. 62, (2016), 12–23.
39. International, A., Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete, in ASTM C876-152015: West Conshohocken, PA.
40. Lootens, D. and Bentz, D.P., “On the relation of setting and early-age strength development to porosity and hydration in cement-based materials” Cement and Concrete Composites, Vol. 68, (2016), 9-14.
41. Bentur, A., Berke, N. and Diamond, S., "Steel Corrosion in Concrete: Fundamentals and civil engineering practice"CRC Press, Boca Raton, Florida, United States, (1997).