Property of corroded concrete under compressive uniaxial loads

Abstract

In order to study the compressive property of corroded concrete, accelerated corrosion test were performed on concrete C30.6 corrosive solutions, including hydraulic acid solution (pH=2), hydraulic acid solution (pH=3) were applied as the corrosive medium. 6 series of corrosion tests, including 111 specimens, were carried out. Mechanical properties of all the corroded specimens were tested respectively. Compressive properties of the corroded specimens (e.g. compressive strength, stress-strain relation, elastic modulus etc.) were achieved. Taking the strength degradation ratio and strain energy loss as damage index, effects of the corrosion solution on the compressive property of corroded concrete were discussed in detail. Relationship between the damage index and corrosion state of specimens were achieved.

Keywords

concrete / corrosion / compressive strength / elastic modulus / stress-strain curve / strain energy loss

References

[1] Andrade C., Sanjuan M. A. Calculation of Chloride Diffusivity in Concrete from Migration Experiments, in non Steady-state Condition[J]. Cement and Concrete Research, 1994, 24(7): 1214-1228.

[2] Al-Amoudi O. S. B., Maslehuddin M., Abdul-Al Y. A. B. Role of Chloride Ions on Expansion and Strength Reduction in Plain and Blended Cements in Sulfate Environments[J]. Construction Building Materials, 1995, 9(1): 25-33.

[3] Tang L., Nilson L. Rapid Determination of the Chloride Diffusivity in Concrete by Applying an Electrical Field[J]. ACI Martial Journal, 1992, 89(1): 49-53.

[4] Yang C. C. A Comparison of Transport Properties for Concrete Using the Ponding Test and the Accelerated Chloride Migration. Materials and Structures, 2005, 38: 313-320.

[5] Goltermann P. Mechanical Predictions on Concrete Deterioration. Part 1:Eigenstresses in concrete[J]. ACI Materials Journal, 1994, 91(6): 543-550.

[6] Corr D. J., Monteiro P. J. M., Kurtis K. E. Sulfate Attack of Concrete: Reliability Analysis[J]. ACI Material Journal, 2001, 98(2): 99-104.

[7] Hal-Ali R. M., Kurtis K. E., Sthapit A. R. Neural Modeling of Concrete Expansion during Long-term Sulfate Exposure[J]. ACI Material Journal, 2001, 98(1): 36-43.

[8] Kurtis K. E., Monteiro P. J. M., Madanat S. M. Empirical Models to Predict Concrete Expansion Caused by Sulfate Attack[J]. ACI Material Journal, 2000, 97(2): 156-161.

[9] Odler I., Colán-Subauste J. Investigation on Cement Expansion Associated with Ettringite Formation[J]. Cement & Concrete Research, 1999, 29(5): 731-735.

[10] Garboczi E. J. Stress, Displacement, and Expansive Cracking around a Single Spherical Aggregate under Different Expansive Conditions[J]. Cement and Concrete Research, 1997, 27(4): 495-500.

[11] Piltner R., Monteiro P. J. M. Stress Analysis of Expansive Reactions in Concrete[J]. Cement and Concrete Research, 2000, 30: 843-848.

[12] Code for Communications Ministry of P.R. China. Standard for Test Method of Mechanical Properties on Ordinary Concrete (GB/T 50081-2002)[S], 2003. Beijing: China Architecture & Building Press.