The Durability of Concrete Mortars with Different Mineral Additives Exposed to Sulfate Attack
DOI:
https://doi.org/10.56294/sctconf2024851Keywords:
Supplementary Cementitious Materials, Water Proof, Silica Fume, Fly Ash, Nano Silica, Absorption, Splitting Tensile Strength, Compressive StrengthAbstract
For several years, extensive research investigations have been conducted examining the effects of acids commonly encountered by industrial facilities in manufacturing environments. Numerous studies have been conducted to examine the durability of concrete containing various chemical additives and fine metals when exposed to various acid solutions, as well as the preventive steps taken to avoid the deterioration of concrete associated with these acids. This research includes an examination of enhancing the effectiveness and function of concrete when exposed to sulfuric acid. It explores the use of waterproofing (WP) and complementary cementitious materials (SCMs), including silica fume Nano silica and fly ash, as well as a water-reducing additive. Cube-shaped samples measuring 100 x 100 x 100 mm were prepared and completely immersed in 2,5 % dilute sulfuric acid solution for 90 and 180 days. Compressive strength, tensile strength, and absorption tests were performed after 28 days, as well as after immersion in a 2,5 % dilute acid solution for 90 and 180 days. The results revealed that after 90 days, there was a 31 % reduction in compressive strength for mixtures with 25 % FA and 5 % SF, and a 46 % decrease for mixtures containing WP, when compared to their corresponding results at the 28 day age under standard conditions. Mineral admixtures significantly reduce absorption rates. After 90 days, WP had 3 % absorption during acid exposure, and after 180 days, the 25 % FA and 5 % SF mixture had 2,3 % absorption. This results from reduced permeable voids due to decreased capillary pores, enhancing concrete durability. The findings also indicated that the impact of exposure to acid on the strength characteristics of concrete becomes more pronounced with prolonged exposure. In addition, the inclusion of NS, SF, and FA in cement concrete results in the development of a unique material that can meet the growing need for construction materials. Furthermore, this technique delivers economic and environmental benefits by minimizing pollution caused by waste products such as FA and SF, which are a residual by-products of thermal power plants and ferrosilicon production respectively
References
1. J. Prasad, D. K. Jain, and A. K. Ahuja, “Factors influencing the sulphate resistance of cement concrete and mortar,” 2006.
2. Q. Nie, C. Zhou, X. Shu, Q. He, and B. Huang, “Chemical, mechanical, and durability properties of concrete with local mineral admixtures under sulphate environment in Northwest China,” Materials, vol. 7, no. 5, pp. 3772–3785, 2014, doi: 10.3390/ma7053772.
3. M. L. Nehdi, A. R. Suleiman, and A. M. Soliman, “Investigation of concrete exposed to dual sulphate attack,” Cem Concr Res, vol. 64, pp. 42–53, 2014.
4. E. F. Irassar, A. Di Maio, and O. R. Batic, “Sulphate attack on concrete with mineral admixtures,” Cem Concr Res, vol. 26, no. 1, pp. 113–123, 1996.
5. F. Bellmann, B. Möser, and J. Stark, “Influence of sulphate solution concentration on the formation of gypsum in sulphate resistance test specimen,” Cem Concr Res, vol. 36, no. 2, pp. 358–363, 2006.
6. C. Yu, W. Sun, and K. Scrivener, “Mechanism of expansion of mortars immersed in sodium sulphate solutions,” Cem Concr Res, vol. 43, pp. 105–111, 2013.
7. M. J. Whittaker, “I -The Impact of Slag Composition on the Microstructure of Composite Slag Cements Exposed to Sulphate Attack,” 2014.
8. A. M. Izzat et al., “Sulfuric acid attack on ordinary Portland cement and geo polymer material,” Revista de Chimie, vol. 64, no. 9, pp. 1011–1014, 2013.
9. A. M. Moslemi, A. Khosravi, M. Izadinia, and M. Heydari, “Application of nano silica in concrete for enhanced resistance against sulphate attack,” in Advanced Materials Research, Trans Tech Publ, 2014, pp. 874–878.
10. S. Barbhuiya and D. Kumala, “Behaviour of a sustainable concrete in acidic environment,” Sustainability, vol. 9, no. 9, p. 1556, 2017.
11. M. Mahmoodian and A. M. Alani, “Effect of temperature and acidity of sulfuric acid on concrete properties,” Journal of Materials in Civil Engineering, vol. 29, no. 10, p. 04017154, 2017.
12. Li, H., Xiao, H-G., Yuan, J., Ou, J., “Microstructure of cement mortar with nanoparticles”, Composites: Part B, 35, 2004, pp. 185-189.
13. Li, G., “Properties of high-volume fly ash concrete incorporating nano-SiO2”, Cement and Concrete Research, 34, 2004, pp.1043-1049.
14. M. M. Kassim, “The durability of sulphate resisting mortar with partial replacement by cement kiln dust,” Anti-Corrosion Methods and Materials, vol. 61, no. 3, pp. 182–190, 2014.
15. C. ASTM, “150, Standard specification for Portland cement,” Annual book of ASTM standards, vol. 4, pp. 134–138, 2002.
16. S. S. Hussein and N. M. Fawzi, “Influence of using various percentages of slag on mechanical properties of fly ash-based geopolymer concrete,” Journal of Engineering, vol. 27, no. 10, pp. 50–67, 2021.
17. T. Shanmugapriya, S. Y. Roja, R. Resmi, and R. N. Uma, “Studies on Flexural Behaviour of High Performance RC Beams with Manufactured Sand and Silica Fume,” International Journal of Civil Engineering and Technology, vol. 7, no. 6, 2016.
18. Shih JY, Chang TP, Hsiao TC. Effect of Nano silica on characterization of Portland cement composite. Materials Science and Engineering: A. 2006 May 25;424(1-2):266-74.
19. Sika® Visco Crete®-180 GS: High Range Water Reducing, Retarding and Slump Retaining Admixture. Product & Technical Data Sheet, Sika Company.
20. A. C. I. Committee, “ACI 211.1-91 Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete, no. 9,” Unites States, pp. 120–121, 2002.
21. British Standard BS. Part 3, “Compressive strength of test specimens,” British Standards Institution, 2002.
22. British Standard BS. Part 6, “Tensile Splitting Strength of test specimens,” London. British Standard Institution, 2009.
23. ASTM International, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete; ASTM C642-13; ASTM International: West Conshohocken, PA, USA, 2013.
24. Al-Amoudi, O. S. B., (2002), “Attack on plain and blended cement exposed to aggressive sulphate environment”, Cement and Concrete Composites, Vol. 24, No. 3, pp. 305-316.
25. Al-Akhras, N. M., (2006), “Durability of metakaolin concrete to sulphate attack” Cement and Concrete Research, Vol. 36, No. 9, pp. 1727-1734.
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Copyright (c) 2024 Shereen Jalil Saif Allah (Translator); Muayad Mohammed Kassim, Ghazwan Abdulsamad Salman (Author)
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