Tamamlayıcı çimentolu malzemelerle betonun sodyum sülfat direnci üzerine karşılaştırmalı bir çalışma

Abstract

Sülfat etkisi betonda dayanıklılık sorunlarına neden olan ana faktörlerden biridir. Bu çalışmada, sülfat direncinin fiziksel/kimyasal etkileşimini değerlendirmek için silis dumanı, yüksek fırın cürufu, uçucu kül, kalker filleri, kireç ve Portland çimentosu ile elde edilen beton karışımları bir dizi deney yapılarak araştırılmıştır. Belirtilen tamamlayıcı çimentolu malzemeleri içeren, beş farklı seri beton karışımı, su/ bağlayıcı oranı 0.33 ve toplam bağlayıcı içeriği 400 kg/m3 alınarak üretilmiştir. Beton örnekleri, 365 gün boyunca kirece doymuş suya ve 50 g/l sodyum sülfat çözeltisine maruz bırakılmıştır. Sülfat direncinin değerlendirilmesi, numunelerin basınç dayanımı ve ağırlık değişiminin belirlenmesi ile yapılmıştır. Sülfat etkisine karşı direncin iyileştirilmesi, mineral katkı maddelerinin oranına göre değerlendirilmiş ve sonuçlar, beton karışımlarında seçilen tamamlayıcı çimentolu malzemelerin kullanılmasının, dayanıklılık performansını önemli ölçüde geliştirdiğini göstermiştir.

Keywords

• Sülfat etkisi
• Sülfat direnci
• Basınç dayanımı
• Beton
• Dayanıklılık

A comparative study on the sodium sulfate resistance of concrete with the supplementary cementitious materials

Abstract

Sulfate attack is one of the main factors causing durability problems in concrete. In this study, in order to evaluate the physical/chemical interaction of sulfate resistance, concrete mixtures with silica fume, blast furnace slag, fly ash, limestone filler, hydrated lime and Portland cement are investigated by conducting a series of experiments. Five different series of concrete mixtures containing the specified supplementary cementitious materials were developed with a water-binder ratio of 0.33 and a total binder content of 400 kg/m3. The concrete samples were exposed to lime-saturated water and sodium sulfate solution of 50 g/l for 365 days. The evaluation of sulfate resistance was done by the determination of compressive strength and change in weight. The improvement of the resistance to sulfate attack is assessed concerning the ratio of the mineral additives and results indicated that using the selected supplementary cementitious materials in the concrete mixtures significantly improves the durability performance.

Keywords

• Sulfate attack
• Sulfate resistance
• Compressive strength
• Concrete
• Durability

References

1. F. Bellmann, W. Erfurt, and H. M. Ludwig, Field performance of concrete exposed to sulphate and low pH conditions from natural and industrial sources. Cem. Concr. Comp., 34, 86-93, 2012. https://doi.org/ 10.1016/j.cemconcomp.2011.07.009
2. M. Sahmaran, O. Kasap, K. Duru, and I. O. Yaman, Effects of mix composition and water-cement ratio on the sulfate resistance of blended cements. Cem. Concr. Comp., 29, 159-167, 2007. https://doi.org/10.1016/ j.cemconcomp.2006.11.007
3. L. Guangcheng, X. Youjun, and T. Xuguang, Evaluating deterioration of concrete by sulfate attack. J. Wuhan University of Technology-Mater. Sci. Ed., 22, 572-576, 2007. https://doi.org/10.1007/s11595-006-3572-6
4. K. K. Sideris, A. E. Savva, and J. Papayianni, Sulfate resistance and carbonation of plain and blended cements. Cem. Concr. Comp., 28, 47-56, 2006. https://doi.org/10.1016/j.cemconcomp.2005.09.001
5. A. M. Diab, A. M. Awad, H. E. Elyamany, and A. M. AbdElmoaty, Guidelines in compressive strength assessment of concrete modified with silica fume due to magnesium sulfate attack. Constr. Build. Mater., 36, 311-318, 2012. https://doi.org/10.1016/j.conbuildmat. 2012.04.075
6. P. S. Mangat, and J. M. El-Khatib, Influence of initial curing on sulphate resistance of blended cement concrete, Cem. Concr. Res., 22, 1089-1100, 1992. https://doi.org/10.1016/0008-8846(92)90039-X
7. N. M. Al-Akhras, Durability of metakaolin concrete to sulfate attac. Cem. Concr. Res., 36, 1727-1734, 2006. https://doi.org/10.1016/j.cemconres.2006.03.026
8. W. Ouyang, J. Chen, and M. Jiang, Evolution of surface hardness of concrete under sulfate attack. Constr. Build. Mater., 53, 419-424, 2014. https://doi.org/ 10.1016/j.conbuildmat.2013.11.107

9. M. Santhanam, M. D. Cohen, and J. Olek, Mechanism of sulfate attack: A fresh look Part 1: Summary of experimental results. Cem. Concr. Res., 36, 2132-2137, 2006. https://doi.org/10.1016/S0008-8846(02)00724-X
10. J. I. Bhatty, and P. C. Taylor, Sulfate resistance of concrete using blended cements or supplementary cementitious materials. Portland Cement Association, Skokie, Illinois, USA, R&D Serial No. 2916a, 2006.
11. C. Shi, A. Fernandez-Jimenez and A. Palomo, New cements for the 21st century: the pursuit of an alternative to Portland cement. Cem. Concr. Res., 41, 750-763, 2011. https://doi.org/10.1617/s11527-012-9953-8
12. A. E. Al-Salami and A. Salem, Effects of mix composition on the sulfate resistance of blended cements. Int. J. Civ. Environ. Eng., 10(6), 43-47, 2010.
13. A. M. Neville, Properties of concrete, 4th. ed., John Wiley & Sons Inc, New York, USA, 1997.
14. H. Rashidian-Dezfouli, and P. R. Rangaraju, A comparative study on the durability of geopolymers produced with ground glass fiber, fly ash, and glass-powder in sodium sulfate solution. Constr. Build. Mater., 153, 996-1009, 2017. https://doi.org/10.1016/ j.conbuildmat.2017.07.139
15. Z. Bascarevic, M. Komljenovic, Z. Miladinovic, V. Nikolic, N. Marjanovic, Z. Zujovic and R. Petrovic, Impact of sodium sulfate solution on mechanical properties and structure of fly ash based on geopolymers. Materials and Structures, 48, 683-697, 2015. https://doi.org/10.1617/s11527-014-0325-4
16. N. Dzunuzovic, M. Komljenovic, V. Nikolic and T. Ivanovic, External sulfate attack on alkali-activated fly ash-blast furnaceslag composite. Constr. Build. Mater., 157, 737-747, 2017. https://doi.org/10.1016/ j.conbuildmat.2017.09.159
17. Z. Zhang, Q. Wang, H. Chen and Y. Zhou, Influence of the initial moist curing time on the sulfate attack resistance of concretes with different binders. Constr. Build. Mater., 144, 541-551, 2017. https://doi.org/ 10.1016/j.conbuildmat.2017.03.235
18. R. E. Hachem, E. Roziere, F. Grondin and A. Loukili, New procedure to investigate external sulfate attack on cementitious materials. Cem. Concr. Compos., 34, 357-364, 2012. https://doi.org/10.1016/j.cemconcomp. 2011.11.010
19. TS 706 EN 12620, Aggregates for Concrete, Turkish Standards Institute, Ankara, 2003.