AN INVESTIGATION ON THE PARTIAL REPLACEMENT OF PORTLAND CEMENT WITH KOSOVO FLY ASH IN CEMENT MORTARS
DOI:
https://doi.org/10.20319/mijst.2017.33.125141Keywords:
Kosovo, Fly Ash, Cement Mortar, Pozzolanic MaterialAbstract
The energy sector is one of the biggest polluters of environment in Kosovo. More than 40 million tons of ash and about 400 hectares of arable land are occupied from the landfill of Kosovo-A and Kosovo-B power plants. On the other hand, the use of fly ashes with proper characteristics, as pozzolanic material in concrete production is a well-known fact. In this context the effect of the partial replacement of Portland cement with Kosovo fly ash in cement pastes and mortars has been investigated. For that purpose, six different series of (0/100, 5/95,10/90,15/85.20/80 and 25/75) fly ash to cement ratios (FA/PC) have been studied. Normal consistency, initial and final setting time of the cement pastes, and water absorption, flexural strength, compressive strength and shrinkage deformation of the mortar specimens were investigated. Test results show that Kosovo fly ash has good parameters that improve the compressive strength of cement mortars and concrete by replacing the Portland cement up to 10%. On the other hand, it increases slightly the water absorption capacity of the mortars. Nevertheless, it can be concluded that the use of Kosovo fly ash in concrete could be a good alternative to be used as a pozzolanic material. Future studies should be focused on the durability effect of Kosovo fly ash on concrete.
References
Al-Zboon, K., Al-Harahsheh, M. S., & Hani, F. B. (2011). Fly ash-based geopolymer for Pb removal from aqueous solution. Journal of hazardous materials, 188(1), 414-421. https://doi.org/10.1016/j.jhazmat.2011.01.133
ASTM C 618-94a, (1998). Standard Specification for Coal and Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete, Annual Book of ASTM Standards, V. 04.02, Concrete and Aggregates. American Society for Testing and Materials, Philadelphia.
ASTM C 157, (2008). Standard Test Method for Length Change of Hardened Hydraulic Cement Mortar and Concrete. Annual Book of ASTM Standards. American Society for Testing and Materials, Pennsylvania:
Atiş, C.D., Görür E.B., Karahan O., Bilim C., İlkentapar S., Luga E. (2015). Very high strength (120 MPa) class F fly ash geopolymer mortar activated at different NaOH amount, heat curing temperature and heat curing duration. Construction and Building Materials 96, 15 October 2015, Pages 673-678 https://doi.org/10.1016/j.conbuildmat.2015.08.089
Atiş, C. D., Sevim, U. K., Özcan, F., Bilim, C., Karahan, O., Tanrikulu, A. H., & Ekşi, A. (2004). Strength properties of roller compacted concrete containing a non-standard high calcium fly ash. Materials Letters, 58(9), 1446-1450. https://doi.org/10.1016/j.matlet.2003.10.007
Bijen, J. (1996). Benefits of slag and fly ash. Construction and building materials, 10(5), 309-314. https://doi.org/10.1016/0950-0618(95)00014-3
Christy, C. F., & Tensing, D. (2010). Effect of Class-F fly ash as partial replacement with cement and aggregate in mortar. Indian Journal of Engineering and Materials Sciences, 17, 140-144.
EN 1015-11, (1999). Methods of Test for Mortar for Masonry-Part 11: Determination of Flexural and Compressive Strength of Hardened Mortar, European Committee for Standardization, Brussels, Belgium.
EN 196-3, (1994). Methods of Testing Cement—Determination of Setting Time and Soundness, European Committee for Standardization, Brussels, Belgium.
EN 197-1. (2000). Cement: composition, specifications and conformity criteria. Part 1: Common Cements, European Committee for Standardization, Brussels, Belgium.
Feng, X., & Clark, B. (2011, May). Evaluation of the physical and chemical properties of fly ash products for use in Portland cement concrete. In 2011 World of Coal Ash Conference, Denver, CO, USA.
Gebler, S., & Klieger, P. (1986). Effect of fly ash on physical properties of concrete. In V. M. Malhotra (Ed.), Proceedings of the 2nd International Conference on the Use of Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete. 2. Farmington Hills: American Concrete Institute. Special Publication, 91, 1-50.
Islam, M. M., & Islam, M. S. (2010). Strength behavior of mortar using fly ash as partial replacement of cement. Concrete Research Letters, 1(3), 98-106.
Krasniqi, D., & Latifi, M. (1996). Teknika e tensioneve te larta. Prishtine. (in Albanian)
Luga, E., & Atis, C. D. (2016). Strength Properties of Slag/Fly Ash Blends Activated with Sodium Metasilicate and Sodium Hydroxide+ Silica Fume. Periodica Polytechnica. Civil Engineering, 60(2), 223. https://doi.org/10.3311/PPci.8270
Luga, E., Atis, C. D., Karahan, O., Ilkentapar, S., & Gorur, E. B. (2017). Strength properties of slag/fly ash blends activated with sodium metasilicate. GRADEVINAR, 69(3), 199-205. https://doi.org/10.14256/JCE.1468.2015
Meyer, C. (2009). The greening of the concrete industry. Cement and concrete composites, 31(8), 601-605. https://doi.org/10.1016/j.cemconcomp.2008.12.010
Morina, I. L. I. R., Dragusha, B. E. D. R. I., Dvorani, S., & Riesbeck, F. (2012). Chemical characteristics of lignite ash from Power Plant Kosova A and local geological settings in Kosova near Prishtina. WSEAS Trans. Environ. Dev, 4(8), 1.
Naganathan, S., & Linda, T. (2013). Effect of fly ash fineness on the performance of cement mortar. Jordan Journal of Civil Engineering, 7(3), 326-331.
Neville, A., (2003). Properties of Concrete, John Wiley & Sons, Inc., London.
Pitroda, J., Zala, L. B., & Umrigar, F. S. (2012). Experimental Investigations on Partial Replacement of Cement with Fly ash in design mix concrete. International Journal of Advanced Engineering Technology, IJAET, 3(4), 126-129.
Short, N. R., & Page, C. L., (1982). The diffusion of chloride ions through Portland and blended cement pastes. Silicates Industrials, 10, 237-240,
Thomas, M. D. A. (2007). Optimizing the use of fly ash in concrete (Vol. 5420). Skokie, IL: Portland Cement Association.
TS EN 1008, (2003). Mixing water for concrete – Specification for sampling, testing and assessing the suitability of water, as mixing water for concrete. Turkish Standard Institute, Ankara, Turkey.
TS EN 196-1, (2009). Methods of Testing Cement – Part 1: Strength Determination Turkish Standard Institute, Ankara, Turkey.
Wesche, K. (Ed.). (2004). Fly ash in concrete: properties and performance (Vol. 7). CRC Press.
Yuan, R. L., & Cook, J. E., (1983). Study of a Class C fly ash concrete in Fly Ash, Silica Fume, Slag and Other Mineral Byproducts in Concrete. American Concrete Institute. Farmington Hills.
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