SavedAdd your journal

Journals / Sigma Mühendislik ve Fen Bilimleri Dergisi / 2019 / Cilt: 37 - Sayı: 3

MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK

Anıl NİŞ
Melis B. ALTUNDAL
Pages
917–926
Publication Date
2020-09-01
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Results indicated that similar surface deterioration was observed on the cube and cylinder specimens due to acid exposure.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, mechanical properties and durability performances of fly ash based geopolymer concrete (FAGPC) and slag based geopolymer concrete (SGPC) were investigated against 5% sulfuric acid attack.
📊
Key Findings & Data:The low calcium (F-type) fly ash (FA) and ground granulated blast furnace slag (GGBS) were utilized as binder materials with an amount of 360 kg/m3, and a combination of sodium silicate and 14 M sodium hydroxide with a silicate to hydroxide ratio of 2.5 were used as an alkaline activator in order to produce geopolymer concretes.
💡
Conclusion & Impact:Results indicated that similar surface deterioration was observed on the cube and cylinder specimens due to acid exposure.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Fly ash based geopolymer concrete (FAGPC) · slag based geopolymer concrete (SGPC) · sulfuric acid attack

Abstract

In this study, mechanical properties and durability performances of fly ash based geopolymer concrete (FAGPC) and slag based geopolymer concrete (SGPC) were investigated against 5% sulfuric acid attack. The low calcium (F-type) fly ash (FA) and ground granulated blast furnace slag (GGBS) were utilized as binder materials with an amount of 360 kg/m3, and a combination of sodium silicate and 14 M sodium hydroxide with a silicate to hydroxide ratio of 2.5 were used as an alkaline activator in order to produce geopolymer concretes. The binder amounts were selected in accordance with the XA3 chemical environmental condition given in TS EN 206 standard. An ordinary Portland cement concrete (OPC) was also produced and exposed to sulfuric acid attacks for comparison. The effect of sulfuric acid on 150x150x150 mm cube and 100x200 mm cylinder specimens was evaluated by visual inspection, weight change, compressive and splitting tensile strength tests. Results indicated that similar surface deterioration was observed on the cube and cylinder specimens due to acid exposure. However, cube specimens showed more weight loss than the cylinder specimens, which can be attributed to the higher acid influenced area due to the size effect. In addition, the SGPC specimens exhibited superior mechanical performance, while FAGPC specimens showed the poorest mechanical performance when low binder amounts (360 kg/m3) were utilized under sulfuric acid attack. The results also pointed out that slag based geopolymer concrete can be utilized in structural applications instead of ordinary Portland cement concrete.

🔖

Cite This Article

NİŞ, A., ALTUNDAL, M. B. (2020). MECHANICAL STRENGTH DEGRADATION OF SLAG AND FLY ASH BASED GEOPOLYMER SPECIMENS EXPOSED TO SULFURIC ACID ATTACK. Sigma Mühendislik ve Fen Bilimleri Dergisi, Cilt: 37 - Sayı: 3, 917–926. https://ajindex.com/articles/419159

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (13)

  1. Bassuoni, M. T., and Nehdi, M. L. (2007) Resistance of self-consolidating concrete to sulfuric acid attack with consecutive pH reduction, Cement and Concrete Research, 37(7), 1070-1084
  2. Chang, Z. T., Song, X. J., Munn, R., and Marosszeky, M. (2005) Using limestone aggregates and different cements for enhancing resistance of concrete to sulphuric acid attack, Cement and Concrete Research, 35(8), 1486-1494
  3. Roy, D. M., Arjunan, P., and Silsbee, M. R. (2001) Effect of silica fume, metakaolin, and low-calcium fly ash on chemical resistance of concrete, Cement and Concrete Research, 31(12), 1809-1813
  4. Okoye, F. N., Prakash, S., and Singh, N. B. (2017) Durability of fly ash based geopolymer concrete in the presence of silica fume, Journal of Cleaner Production, 149, 1062-1067
  5. J. Davidovits, (2008) Geopolymer Chemistry and Applications., 2nd Edn., Inst. Geopolymer, SaintQuentin, Fr
  6. J. Davidovits, (1993) Geopolymer cement to minimize carbon-dioxide greenhouse-warming., Ceram. Trans. 37, 165–182
  7. Hardjito, D., Wallah, S. E., Sumajouw, D. M., & Rangan, B. V. (2004). On the development of fly ash-based geopolymer concrete. Materials Journal, 101(6), 467-472
  8. Çevik, A., Alzeebaree, R., Humur, G., Niş, A., & Gülşan, M. E. (2018) Effect of nano-silica on the chemical durability and mechanical performance of fly ash based geopolymer concrete, Ceramics International, 44(11), 12253-12264
  9. Gülşan, M. E., Mohammedameen, A., Şahmaran3b, M., Niş4c, A., Alzeebaree, R., and Abdulkadir, Ç. (2018) Effects of sulphuric acid on mechanical and durability properties of ECC confined by FRP fabrics, Advances in Concrete Construction, 6 (2), 199-220
  10. Kurtoğlu, A. E., Alzeebaree, R., Aljumaili, O., & Niş1c, A. (2018). Mechanical and durability properties of fly ash and slag based geopolymer concrete, Advances in Concrete Construction, 6 (4), 345-362
  11. Lee, N. K., and Lee, H. K. (2016) Influence of the slag content on the chloride and sulfuric acid resistances of alkali-activated fly ash/slag paste, Cement and Concrete Composites, 72, 168-179
  12. Mohammedameen, A., Gülşan, M. E., Alzeebaree, R., Çevik, A., & Niş, A. (2019) Mechanical and durability performance of FRP confined and unconfined strain hardening cementitious composites exposed to sulfate attack, Construction and Building Materials, 207, 158-173
  13. Aydın, S., Yazıcı, H., Yiğiter, H., and Baradan, B. (2007) Sulfuric acid resistance of high-volume fly ash concrete, Building and E