Mechanical and Microstructural Properties of Mortars: Obsidian Powder Effect

Year 2024, , 170 - 176, 24.06.2024

Talip Çakmak , Ali Gürbüz , Zafer Kurt , İlker Ustabaş

https://doi.org/10.47481/jscmt.1485912

Abstract

Concrete has been the world's most produced and utilized building material for years due to its economic and easy accessibility. However, it attracts attention due to the CO2 emitted from cement, the raw material of concrete, during the production and consumption stages. Although there are different research studies to reduce this emission, one of the most logical solutions is to use pozzolanic materials with cement and reduce the need for cement. This paper investigated the general material characteristics of mortar samples generated by substituting obsidian pow- der with pozzolanic properties into cement at different ratios by weight. Mortar specimens with varying proportions of obsidian, such as 0%, 10%, 20%, and 30% by weight, were subjected to mechanical tests at 3, 7, 14, and 28 days. Material tests like X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the material. As a result of the me- chanical tests, 42.52 MPa compressive strength was obtained from the 28-day reference sample, while 44.331 MPa compressive strength was obtained from the mortar sample with 30% obsid- ian substitution. The outcomes of this paper noted that obsidian powder, which has pozzolan- ic properties, increased the mechanical strength of cementitious mortar specimens. This work indicates the suitability of using obsidian as pozzolan material with cement was determined.

Keywords

Cement, mortar, obsidian, XRD

References

• Kurt, Z., Çakmak, T., Gürbüz, A., & Ustabaş, İ. (2022). Estimating the compressive strength of fly ash added concrete using artificial neural net- works. Celal Bayar Univ J Sci, 18(4), 365–369.
• ISO. (2021). Strategic Business Plan (ISO Standart No. ISO/TC 283). https://committee.iso.org/files/ live/sites/tc283/files/Documents/ISO_TC_283_ Strategic_business_Plan_%20April2022.pdf
• Ustabas, İ., Demirci, M., Baltas, H., Demir, Y., Er- dogdu, S., Kurt, Z., & Çakmak, T. (2022). Mechani- cal and radiation attenuation properties of conven- tional and heavy concrete with diverse aggregate and water/cement ratios. Građevinar, 74(8), 635– 645. [CrossRef]
• Lee, N. K., Jang, J. G., & Lee, H. K. (2014). Shrinkage characteristics of alkali-activated fly ash/slag paste and mortar at early ages. Cem Concr Compos, 53, 239–248. [CrossRef]
• Kurt, Z., Ustabas, İ., & Çakmak, T. (2023). Novel binder material in geopolymer mortar production: Obsidian stone powder. Struct Concr, 24(4), 5600– 5613. [CrossRef]
• Erdoğan, S. T., & Sağlık, A. Ü. (2013). Early-age ac- tivation of cement pastes and mortars containing ground perlite as a pozzolan. Cem Concr Compos, 38, 29–39. [CrossRef]
• Mielenz, R. C., Greene, K. T., & Schieltz, N. C. (1951). Natural pozzolans for concrete. Econ Geol, 46, 311–328. [CrossRef]
• Scholer, A., Lothenbach, B., Winnefeld, F., & Zajac, M. (2015). Hydration of quaternary Portland ce- ment blends containing blast-furnace slag, siliceous fly ash and limestone powder. Cem Concr Compos, 55, 374–382. [CrossRef]
• Uzal, B., Turanlı, L., Yücel, H., Göncüoğlu, M. C., & Çulfaz, A. (2010). Pozzolanic activity of clinoptiloli- te: A comparative study with silica fume, fly ash and a non-zeolitic natural pozzolan. Cem Concr Res, 40, 398–404. [CrossRef]
• Caputo, D., Liguori, B., & Colella, C. (2008). Some advances in understanding the pozzolanic activity of zeolites: The effect of zeolite structure. Cem Concr Compos, 30, 455–462. [CrossRef]
• Marjanović, M., Komljenović, Z., Baščarević, V., Ni- kolić, R., & Petrović, N. (2015). Physical–mechani- cal and microstructural properties of alkali-activat- ed fly ash–blast furnace slag blends. Ceram Int, 41, 1421–1435. [CrossRef]
• Ustabaş, İ. (2018). Effect of mineral additive use on permeation properties of concrete and the relation- ship between permeation and carbonation. Turk J Mater, 3(1), 38–52.
• Ustabaş, İ., & Ömür, İ. (2019). The effect of obsidian from Rize region on the hydration temperature of cement. Nevsehir J Sci Technol, 8, 78–87. [CrossRef]
• Keçek, İ., Özcan, A., Toprak, M. U., & Demirbilek, M. (2023). The use of Kütahya Çayca Tuff as a min- eral additive to cement. J Gumushane Univ Inst Sci Technol, 13(2), 432–443.
• Zhao, Y., Gao, J., Liu, C., Chen, X., & Xu, Z. (2020). The particle-size effect of waste clay brick powder on its pozzolanic activity and properties of blended cement. J Clean Prod, 242, 118521. [CrossRef]
• Çullu, M., Bolat, H., Vural, A., & Tuncer, E. (2016). Investigation of pozzolanic activity of volcanic rocks from the northeast of the Black Sea. Sci Eng Compos Mater, 23(3), 315–323. [CrossRef]
• Araújo, R. A., de Menezes, A. L. R., Cabral, K. C., Nóbrega, A. K. C., Martinelli, A. E., & Dantas, K. G. M. (2019). Evaluation of the pozzolanic activity of red ceramic waste using mechanical and physico- chemical methods. Cerâmica, 65, 461–469. [CrossRef]
• Aruntas, H. Y., Şahinöz, M., & Dayı, M. (2024). In- vestigation of the effect of ground blast furnace slag and slaked lime on cement dough and mortar prop- erties. J Polytech. Advance online publication.
• ASTM Int. (2011). Standard test method for com- pressive strength of hydraulic cement mortars (Us- ing 2-in. or [50-mm] Cube Specimens) (ASTM C109/C109M-11).
• ASTM Int. (2012). Standard specification for coal fly ash and raw or calcined natural pozzolan for use in concrete (ASTM C618-12a).
• Turkish Standards Institute. (2012). Cement - Sec- tion 1: Compound, properties and conformity criteria of general cements (TS EN 197-1:2012).
• ASTM Int. (2007). Standard specification for mortar for unit masonry. United States American Society for Testing and Materials, 2–13 (ASTM C270).
• Pehlivan, H. (2023). Kalsine kil katkılı çimento harçlarının üretiminde nano silika kullanımının araştırılması. Euroasia J Math Eng Nat Med Sci, 10(28), 1–12.
• Dilek, H., & Akpınar, P. (2023). A comparative study on the use of waste brick and glass in cement mor- tars and their effects on strength properties. J Sus- tain Const Mater Technol, 8(4), 269–277. [CrossRef]
• Koçak, Y. (2016). Effects of superplasticizer and trace on cement hydration. Pamukkale Univ J Eng Sci, 23(3), 184–192. [CrossRef]
• Dorum, A., Koçak, Y., Yılmaz, B., & Uçar, A. (2009). Effects of blast furnace slag on cement surface prop- erties and hydration. J Sci Technol Dumlupınar Univ, (019), 47–58.
• Uzbaş, B., & Aydın, A. C. (2018). Investigation of me- chanical properties of concrete with fly ash and silica fume by XRD. Sinop Univ J Sci Technol, 3(2), 1–22. Demirel, Ö., & Demirhan, S. (2021).
• Investigation of microstructural properties of high-volume fly ash blended cement mortars including micronized cal- cite. J Fac Eng Archit Gazi Univ, 36(4), 2255–2269.
• Kırgız, M. S. (2011). Literature research on the de- termination of hydration compounds of substituted and admixed cement pastes using scanning electron microscopy. J Eskisehir Osmangazi Univ Fac Eng Ar- chit, 24(1), 72–90.
• Dorum, A., Koçak, Y., Yılmaz, B., & Uçar, A. (2010). The effect of electrokinetic properties on fly ash ad- ditive cement hydration. Gazi Univ J Fac Eng Archit, 25(3), 449–457.
• Günel, G., Alakara, E. H., Demir, İ., & Sevim, O. (2024). Effect of recycled cement mortar powder on cement-bonded composites. Polytech J, 27(2), 533– 543. [CrossRef ]