Computers and Concrete

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X-ray CT monitoring of macro void development in mortars exposed to sulfate attack

  • Tekin, Ilker (Department of Civil Engineering, Faculty of Engineering, Bayburt University) ;
  • Birgul, Recep (Department of Civil Engineering, Faculty of Engineering, Mugla Sitki Kocman University) ;
  • Aruntas, Huseyin Y. (Department of Civil Engineering, Faculty of Technology, Gazi University)
  • Received : 2017.08.13
  • Accepted : 2017.11.22
  • Published : 2018.04.25
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Abstract

This study reports the results of nondestructive monitoring of macro void developments in mortars manufactured with both ordinary Portland cement and sulfate resistant cement. Two types of curing were utilized; tap water curing and another curing environment that contains 5% $Na_2(SO_4)$ solution. Being the primary objective of this study, macro void developments of the mortar specimens were monitored by X-ray Medical Computerized Tomography. Compressive strength tests and water absorption tests were conducted on specimens that were kept in both curing environments for a duration of 560 days. Data analyses yielded consistent results among the three tests used in this experimental study. Macro void ratios of mortars decreased at the beginning of experiments for a certain period; afterwards, macro void ratios increased. The objective of this study was accomplished as anticipated since X-CT image analysis was able to nondestructively monitor macro void development process in cement mortars.

Keywords

Acknowledgement

Supported by : TUBITAK

References

  1. Aruntas, H.Y., Tekin, I. and Birgul, R. (2010), "Determining Hounsfield Unit values of mortar constituents by computerized tomography", Measure., 43(3), 410-414. https://doi.org/10.1016/j.measurement.2009.12.010
  2. ASTM C 1012 (2002), Standard Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution, Annual Book of ASTM Standards, USA.
  3. ASTM C452 (2002), Standard Test Method for Potential Expansion of Portland-Cement Mortars Exposed to Sulfate, Annual Book of ASTM Standards, USA.
  4. Birgul, R. (2008), "Monitoring macro voids in mortar by X-ray computed tomography", Nucl. Instr. Meth. Phys. Res. A, 596, 459-66. https://doi.org/10.1016/j.nima.2008.08.080
  5. Burlion, N., Bernard, D. and Chena, D. (2006), "X-ray microtomography: Application to microstructure analysis of a cementitious material during leaching process", Cement Concrete Res., 36(2), 346-357. https://doi.org/10.1016/j.cemconres.2005.04.008
  6. Erdogan, S.T., Garboczi, E.J. and Fowler, D.W. (2007), "Shape and size of microfine aggregates: X-ray microcomputed tomography vs. laser diffraction", Powder. Technol., 177(2), 53-63. https://doi.org/10.1016/j.powtec.2007.02.016
  7. Erdogan, S.T., Quiroga, P.N., Fowler, D.W., Saleh, H.A., Livingston, R.A., Garboczi, E.J., Ketcham, P.M., Hagedorn, J.G. and Satterfield, S.G. (2006), "Three-dimensional shape analysis of coarse aggregates: New techniques for and preliminary results on several different coarse aggregates and reference rocks", Cement Concrete Res., 36(9), 1619-1627. https://doi.org/10.1016/j.cemconres.2006.04.003
  8. Martz, H.E., Roberson, G.P., Skeate, M.F., Schneberk, D.J. and Azevedo, S.G. (1991), "Computerized tomography analysis of reinforced concrete", Mater. J., 90(3), 259-264.
  9. Martz, H.E., Scheberk, D.J., Roberson, G.P. and Monteiro, P.J.M. (1993), "Computerized Tomography Analysis of Reinforced Concrete", Mater. J. Am. Concrete Inst., 90(3), 259-264.
  10. Mehta, P.K. and Monteiro, P.J.M. (2006), Concrete: Microstructure, Properties and Materials, 2nd Edition, McGraw Hill, New York, USA.
  11. Morgan, I.L., Ellinger, H., Klinksiek, R. and Thompson, J.N. (1980), "Examination of concrete by computerized tomography", ACI J. Proc., 77(1), 23-27.
  12. Naik, N.N., Jupe, A.C., Stock, S.R., Wilkinson, A.P., Leed, P.L. and Kurtis, K.E. (2006), "Sulfate attack monitored by microCT and EDXRD: Influence of cement type, water-to-cement ratio, and aggregate", Cement Concrete Res., 36(1), 144-159. https://doi.org/10.1016/j.cemconres.2005.06.004
  13. Neville, A.M. (1981), Properties of Concrete, 3rd Edition, Longman Scientific & Technical, England.
  14. Santhanam, M., Cohen, M.D. and Olek, J., (2003), "Mechanism of sulfate attack: A fresh look: Part 2: Proposed mechanisms", Cement Concrete Res., 33(3), 341-346. https://doi.org/10.1016/S0008-8846(02)00958-4
  15. Stock, S.R., Naik, N.K., Wilkinson, A.P. and Kurtis, K.E. (2002), "X-ray micro tomography (microCT) of the progression of sulfate attack of cement paste", Cement Concrete Res., 32(10), 1673-1675. https://doi.org/10.1016/S0008-8846(02)00814-1
  16. Tanyildizi, H. (2017), "Prediction of compressive strength of lightweight mortar exposed to sulfate attack", Comput. Concrete, 19(2), 217-226. https://doi.org/10.12989/cac.2017.19.2.217
  17. Taud, H., Martinez-Angeles, R., Parrot, J.F. and Hernandez-Escobedo, L. (2005), "Porosity estimation method by X-ray computed tomography", J. Petrol Sci. Eng., 47(3-4), 209-217. https://doi.org/10.1016/j.petrol.2005.03.009
  18. Tekin, I., Birgul, R. and Aruntas, H.Y. (2010), "Determination of void development in cement mortar by computerized tomography", Cement Concrete World, 13, 67-76.
  19. Tekin, I., Birgul, R. and Aruntas, H.Y. (2012), "Determination of the effect of volcanic pumice replacement on macro void development for blended cement mortars by computerized tomography", Concrete Build. Mater., 35, 15-22. https://doi.org/10.1016/j.conbuildmat.2012.02.084
  20. TS 10157 (2007), Cement-Composition, Specifications and Conformity Criteria for Sulphate-Resisting Cement, Institute of Turkish Standards, Ankara, Turkey.
  21. TS 3624 (1981), Test Method for Determination the Specific Gravity the Absorption Water and the Void Ratio in Hardened Concrete, Institute of Turkish Standards, Ankara, Turkey.
  22. TS EN 196-1 (2002), Methods of Testing Cement-Part 1: Determination of Strength, Institute of Turkish Standards, Ankara, Turkey.
  23. TS EN 197-1 (2002), Cement-Part 1: Composition, Specifications and Conformity Criteria for Common Cements, Institute of Turkish Standards, Ankara, Turkey.
  24. TS EN 197-2 (2002), Cement-Part 2: Conformity Evaluation, Institute of Turkish Standards, Ankara, Turkey.
  25. Wong, R.C.K. and Chau, K.T. (2005), "Estimation of air void and aggregate spatial distributions in concrete under uniaxial compression using computer tomography scanning", Cement Concrete Res., 35(8), 1566-1576. https://doi.org/10.1016/j.cemconres.2004.08.016
  26. Xiong, C., Jiang, L., Zhang, Y. and Chu, H. (2015), "Modeling of damage in cement paste subject to external sulfate attack", Comput. Concrete, 16(6), 847-864. https://doi.org/10.12989/cac.2015.16.6.847
  27. Yaman, I.O., Hearn, N. and Aktan, H.M. (2002), "Active and nonactive porosity in concrete Part I: Experimental evidence", Mater. Struct., 35, 102-109. https://doi.org/10.1007/BF02482109
  28. Yaman, I.O., Hearn, N. and Aktan, H.M. (2002), "Active and nonactive porosity in concrete Part II: Evaluation of existing models", Mater. Struct., 35, 110-116. https://doi.org/10.1007/BF02482110
  29. Yin, G., Zuo, X, Tang, Y., Ayinde, O. and Ding, D. (2017), "Modeling of time-varying stress in concrete under axial loading and sulfate attack", Comput. Concrete, 19(2), 143-152. https://doi.org/10.12989/cac.2017.19.2.143
  30. Zuo, X., Sun, W., Li, H. and Zhao, Y. (2012), "Modeling of diffusion-reaction behavior of sulfate ion in concrete under sulfate environments", Comput. Concrete, 10(1), 79-93. https://doi.org/10.12989/cac.2012.10.1.079
  31. Zuo, X., Wang, J., Sun, W., Li, H. and Yin, G., (2017), "Numerical investigation on gypsum and ettringite formation in cement pastes subjected to sulfate attack", Comput. Concrete, 19(1), 19-31. https://doi.org/10.12989/cac.2017.19.1.019

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