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Mechanical properties and durability of alkali-activated slag repair mortars containing silica fume against freeze-thaw cycles and salt scaling attack

  • Moodi, Faramarz (Faculty of Civil and Environmental Engineering, Amirkabir University of Technology) ;
  • Norouzi, Sepehr (Faculty of Civil and Environmental Engineering, Amirkabir University of Technology) ;
  • Dashti, Pooria (Faculty of Civil and Environmental Engineering, Amirkabir University of Technology)
  • Received : 2020.11.01
  • Accepted : 2021.05.17
  • Published : 2021.06.25
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Abstract

Freeze and thaw phenomena in cold regions are the main cause of severe damage to concrete structures. Alkali-activated slag repair mortars, which are introduced as a suitable material for the replacement of Portland cement, can be used as the protective coating for these damaged structures. The mechanical properties and durability of this coating layer should be studied. In this study, the mechanical properties and durability of alkali-activated slag repair mortars with silica fume (SF) participation as inorganic additives against freeze-thaw and salt scaling attacks have been investigated. In order to evaluate the effects of alkaline activators type, the ratio of these solutions to Pozzolan (Pozz), and the use of SF as a substitute base material, these three factors were considered as the main variables to produce 12 alkali-activated slag mortar mixtures. To investigate their mechanical properties, compressive strength, tensile adhesion strength, and drying shrinkage tests were conducted. Also, mortar specimen length change, compressive strength loss, weight loss, and dynamic elastic modulus were measured to evaluate the durability features against freeze-thaw and salt scaling attacks. According to the results, in addition to higher compressive strength and adhesion resistance of alkali-activated slag repair mortars, these mortars showed at least 30% better durability against freeze-thaw and salt scaling attacks than cement-based repair mortar. Also, alkali-activated slag mixtures containing potassium hydroxide, alkaline solution (AS) to Pozz ratio of 0.7, and SF had the best mechanical properties and frost resistance among all mixtures.

Keywords

References

  1. Amran, Y.M., Alyousef, R., Alabduljabbar, H. and El-Zeadani, M. (2020), "Clean production and properties of geopolymer concrete; A review", J. Clean. Prod., 251, 119679. https://doi.org/10.1016/j.jclepro.2019.119679.
  2. ASTM C109/C109M (2020), Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (using 2-in. or [50-mm] Cube Specimens), American Society for Testing and Material, West Conshohocken, PA.
  3. ASTM C128 (2001), Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, American Society for Testing and Material, West Conshohocken, PA.
  4. ASTM C1437 (2015), Standard Test Method for Flow of Hydraulic Cement Mortar, American Society for Testing and Material, West Conshohocken, PA.
  5. ASTM C596 (2018), Standard Test Method for Drying Shrinkage of Mortar Containing Hydraulic Cement, American Society for Testing and Material, West Conshohocken, PA.
  6. ASTM C666/C666M (2015), Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing, American Society for Testing and Material, West Conshohocken, PA.
  7. ASTM C672/C672M (2012), Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals, American Society for Testing and Material, West Conshohocken, PA.
  8. ASTM D7234 (2019), Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete using Portable Pull-Off Adhesion Testers, American Society for Testing and Material, West Conshohocken, PA.
  9. BS EN 480 (2005), Admixtures for Concrete, Mortar and Grout. Test Methods, Determination of capillary absorption, British Standards Institution.
  10. Cai, L., Wang, H. and Fu, Y. (2013), "Freeze-thaw resistance of alkali-slag concrete based on response surface methodology", Constr. Build. Mater., 49, 70-76. https://doi.org/10.1016/j.conbuildmat.2013.07.045.
  11. Copuroglu, O. and Schlangen, E. (2008), "Modeling of frost salt scaling", Cement Concrete Res., 38(1), 27-39. https://doi.org/10.1016/j.cemconres.2007.09.003.
  12. Degirmenci, F.N. (2018), "Freeze-thaw and fire resistance of geopolymer mortar based on natural and waste pozzolans", 62(1), https://doi.org/10.13168/cs.2017.0043.
  13. Dimitre, G.V. (2012), "Evaluation of test methods for de-icer scaling resistance of concrete", MS Dessertation, Civil Engineering, University of Toronto, Toronto.
  14. Ebrahimi, K., Daiezadeh, M.J., Zakertabrizi, M., Zahmatkesh, F. and Korayem, A.H. (2018), "A review of the impact of micro-and nanoparticles on freeze-thaw durability of hardened concrete: Mechanism perspective", Constr. Build. Mater., 186, 1105-1113. https://doi.org/10.1016/j.conbuildmat.2018.08.029.
  15. Fan, L., Li, F.H., Zhang, Y.W., Cui, S.A. and Li, J.L. (2013), "Research into the concrete freeze-thaw damage mechanism based on the principle of thermodynamics", Appl Mech Mater, 357, 751-756. https://doi.org/10.4028/www.scientific.net/AMM.357-360.751.
  16. Fu, Y., Cai, L. and Yonggen, W. (2011), "Freeze-thaw cycle test and damage mechanics models of alkali-activated slag concrete", Constr. Build. Mater., 25(7), 3144-3148. https://doi.org/10.1016/j.conbuildmat.2010.12.006.
  17. Garbalinska, H. and Wygocka, A. (2014), "Microstructure modification of cement mortars: Effect on capillarity and frostresistance", Constr. Build. Mater., 51, 258-266. https://doi.org/10.1016/j.conbuildmat.2013.10.091.
  18. Hasnaoui, A., Ghorbel, E. and Wardeh, G. (2019), "Optimization approach of granulated blast furnace slag and metakaolin based geopolymer mortars", Constr. Build. Mater., 198, 10-26. https://doi.org/10.1016/j.conbuildmat.2018.11.251.
  19. ISO 9277 (2010), Determination of the Specific Surface Area of Solids by Gas Absorption- BET Method, International Organization for Standardization, Geneva.
  20. Jindal, B.B. (2019), "Investigations on the properties of geopolymer mortar and concrete with mineral admixtures: A review", Constr. Build. Mater., 227, 116644. https://doi.org/10.1016/j.conbuildmat.2019.08.025.
  21. Kotwal, A.R., Kim, Y.J., Hu, J. and Sriraman, V. (2015), "Characterization and early age physical properties of ambient cured geopolymer mortar based on class C fly ash", Int. J. Concr. Struct. M., 9(1), 35-43. https://doi.org/10.1007/s40069-014-0085-0.
  22. Kurtoglu, A.E., Alzeebaree, R., Aljumaili, O., Nis, A., Gulsan, M.E., Humur, G. and Cevik, A. (2018), "Mechanical and durability properties of fly ash and slag based geopolymer concrete", Adv. Concrete Constr., 6(4), 345. http://dx.doi.org/10.12989/acc.2018.6.4.345.
  23. Law, D.W., Adam, A.A., Molyneaux, T.K., Patnaikuni, I. and Wardhono, A. (2015), "Long term durability properties of class F fly ash geopolymer concrete", Mater. Struct., 48(3), 721-731. https://doi.org/10.1617/s11527-014-0268-9.
  24. Moodi, F., Ramezanianpor, A., Farhadian, F. and Dashti, P. (2021), "Durability of cementitious and geopolymer coating mortars against sulfuric acid attack", Amirkabir J. Civil Eng., 53(9), 6-6. https://doi.org/ 10.22060/ceej.2020.18068.6757.
  25. Nadoushan, M.J. and Ramezanianpour, A.A. (2016), "The effect of type and concentration of activators on flowability and compressive strength of natural pozzolan and slag-based geopolymers", Constr. Build. Mater., 111, 337-347. https://doi.org/10.1016/j.conbuildmat.2016.02.086.
  26. Nawaz, M., Heitor, A. and Sivakumar, M. (2020), "Geopolymers in construction-recent developments", Constr. Build. Mater., 260, 120472. https://doi.org/10.1016/j.conbuildmat.2020.120472.
  27. Okoye, F.N., Prakash, S. and Singh, N.B. (2017), "Durability of fly ash based geopolymer concrete in the presence of silica fume", J. Clean. Prod., 149, 1062-1067. https://doi.org/10.1016/j.jclepro.2017.02.176.
  28. Patil, A.A., Chore, H.S. and Dode, P.A. (2014), "Effect of curing condition on strength of geopolymer concrete", Adv. Concrete Constr., 2(1), 029. http://dx.doi.org/10.12989/acc.2014.2.1.029 .
  29. Rajesh, D.V.S.P., Narender, R.A., Venkata, T.A. and Raghavendra, M. (2013), "Performance of alkali activated slag with various alkali activators", Int. J. Innov. Res. Eng. Tech., 2, 378-386.
  30. Ramezanianpour, A.A. and Moeini, M.A. (2018), "Mechanical and durability properties of alkali activated slag coating mortars containing nanosilica and silica fume", Constr. Build. Mater., 163, 611-621. https://doi.org/10.1016/j.conbuildmat.2017.12.062.
  31. Ramezanianpour, A.A., Bahman Zadeh, F., Zolfagharnasab, A. and Ramezanianpour, A.M. (2018), "Mechanical properties and chloride ion penetration of alkali-activated slag concrete", In High Tech Concrete: Where Technology and Engineering Meet, Springer, Cham. https://doi.org/10.1007/978-3-319-59471-2_252.
  32. Ramezanianpour, A.A., Bahman Zadeh, F., Zolfagharnasab, A. and Ramezanianpour, A.M. (2018), "Studying the effect of the amount of source material and water to binder ratio on chloride ions ingress in alkali-activated slag concretes", Amirkabir J. Civil Eng., 50(4), 673-684. https://dx.doi.org/10.22060/ceej.2016.695.
  33. Ramezanianpour, A.A., Bahman Zadeh, F., Zolfagharnasab, A., Pourebrahimi, M.R. and Ramezanianpour, A.M. (2016), "Evaluation of mechanical properties and chloride ions penetration through accelerated test method in alkali activated slag cConcrete", The 2nd International Conference on Concrete Sustainability (ICCS16), Madrid, Spain.
  34. Rashad, A.M. and Khalil, M.H. (2013), "A preliminary study of alkali-activated slag blended with silica fume under the effect of thermal loads and thermal shock cycles", Constr. Build. Mater., 40, 522-532. https://doi.org/10.1016/j.conbuildmat.2012.10.014.
  35. Rathinam, K., Kanagarajan, V. and Banu, S. (2020), "Evaluation of protective coatings for geopolymer mortar under aggressive environment", Adv. Mater. Res., 9(3), 219-231. https://doi.org/10.12989/amr.2020.9.3.219.
  36. Ridtirud, C., Chindaprasirt, P. and Pimraksa, K. (2011), "Factors affecting the shrinkage of fly ash geopolymers", Int. J. Min. Met. Mater, 18(1), 100-104. https://doi.org/10.1007/s12613-011-0407-z.
  37. Rostami, M. and Behfarnia, K. (2017), "The effect of silica fume on durability of alkali activated slag concrete", Constr. Build. Mater., 134, 262-268. https://doi.org/10.1016/j.conbuildmat.2016.12.072.
  38. Sabir, B.B. (1997), "Mechanical properties and frost resistance of silica fume concrete", Cement Concrete Compos., 19(4), 285-294. https://doi.org/10.1016/S0958-9465(97)00020-6.
  39. Shaikh, F.U. (2014), "Effects of alkali solutions on corrosion durability of geopolymer concrete", Adv. Concrete constr., 2(2), 109. http://dx.doi.org/10.12989/acc.2014.2.2.109.
  40. Singhal, D. (2017), "Development of mix design method for geopolymer concrete", Adv. Concrete Constr., 5(4), 377. http://dx.doi.org/10.12989/acc.2017.5.4.377.
  41. Valenza II, J.J. and Scherer, G.W. (2007), "A review of salt scaling: II. Mechanisms", Cement Concrete Res., 37(7), 1022-1034. https://doi.org/10.1016/j.cemconres.2007.03.003.
  42. Zhang, P., Zheng, Y., Wang, K. and Zhang, J. (2018), "A review on properties of fresh and hardened geopolymer mortar", Compos. Part B. Eng., 152, 79-95. https://doi.org/10.1016/j.compositesb.2018.06.031.