Document Type : Research Paper


1 Civil Engineering Dept.., University of Technology-Iraq, Alsina’a Street, P.O Box 10066 Baghdad, Iraq.

2 Civil Engineering Dept., University of Technology-Iraq, Alsina’a Street, P.O Box 10066 Baghdad, Iraq.


The production process of cement is the main binder material in concrete usually accompanied by carbon dioxide emission. Therefore, geopolymer concrete (GPC) an alternative binder material was developed as a replacement for cement. In order to make this promising material more common in constructions and applicable for different design purposes further investigations for GPC mechanical properties were needed. This work aims to predicate the splitting tensile strength, modulus of elasticity and flexural strength for normal and high strength GPC by deriving new equations covering a wide range of compressive strength based on data available from previous work. Equations behavior along the changes in compressive strength from normal to high is adopted in comparisons as illustrated. The results show that the proposed equations, as compared with other equations established by previous works, provide a steady behavior for the various values of compressive strength especially for high strength. The coefficient of variation (COV) used as additional comparison criteria, and shows that the proposed equations provide better estimation of GPC mechanical properties.


  • Geopolymer concrete an alternative binder material.
  • The production of GPC depended on the minerals found in materials such as fly ash.
  • Predication of mechanical properties for normal and high strength GPC.


[1] M.Kalaivani, Experimental investigation for flexural strength of fly ash concrete with addition of alkaline activater, ARPN Journal of Engineering and Applied Sciences,  10, 11, 2015 , 4838-4841.
[2] M. Venuand T. D.Rao, An experimental investigation of the stress-strain behavior of geopolymer concrete, Slovak Journal of Civil Engineering, 26, 2, 2018,30–34.
[3] S.Chitralaa, G. J. Jadaproluband S.Chundupallia, Study and predicting the stress-strain characteristics of geopolymer concrete under compression, Case Studies in Construction Materials, 8, 2018,172–192, 2018.
[4] K.Neupane, D. Chalmers and P.Kidd, High-Strength geopolymer concrete- properties, advantages and challenges, Advances in Materials,. 7, 2, 2018, 15-25.
[5] W. I. Khalil, Q. J. Frayyeh, and M. F. Ahmed, Characteristics of Eco-friendly Metakaolin Based Geopolymer Concrete Pavement Bricks, Engineering and Technology Journal, 38, 11, 2020, 1705-1716.
[6] W. I. Khalil1, Q. J. Frayyeh, H. T. Abed, Effect of Ordinary Portland Cement on Some Properties of Pervious Geopolymer Concrete,Engineering and Technology Journal, 39, 04, 2021,668-674.
[7] ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318M-14) and Commentary, American Concrete Institute, Farmington Hills, Michigan, emotion
[8] 503, 2014.
[9] CEB-FIP Model Code 90, CEB Bulletin No. 213/214, 1993.
[10] G. Lavanyaand J.Jegan, Evaluation of relationship between split tensile strength and compressive strength for geopolymer concrete of varying grades and molarity, International Journal of Applied Engineering Research, 10, 15, 2015,  35523-35527.
[11] N.Arioglu, Z. C. Girginand E.Arioglu, Evaluation of Ratio between Splitting Tensile Strength and Compressive Strength for Concretes up to 120 MPa and its Application in Strength Criterion, ACI Materials Journal, 103, 1, 2006,18-24.
[12] Australian Standard for Concrete Structures. AS3600, North Sydney, Australia, 1994.
[13]  Z.Pan, J. G. Sanjayanand B. V.Rangan, Fracture properties of geopolymer paste and concrete, Magazine of Concrete Research, 63 ,10, 2011, 763–771.
[14] M. Olivia and H.Nikraz, Properties of fly ash geopolymer concrete   designed by Taguchi method, materials and design, 36, 2012, 191-198.
[15] P. S.Deb, P. Nathand P. K.Sarker, The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature , Materials and design, 62, 2014,32-39..
[16] K. Ramujeeand M.PothaRaju, Mechanical Properties of Geopolymer Concrete Composites , 5th International Conference of Materials Processing and Characterization (ICMPC 2016), Materials Today: Proceedings , 4,2017, 2937–2945.
[17] B. Joseph and G.Mathew, Influence of aggregate content on the behavior of fly ash based geopolymer concrete , ScientiaIranica A, 19,  5, 2012, 1188–1194.
[18] V.Bhikshma, M. K. Reddy and T. S.Rao, An experimental investigation on properties of geopolymer concrete (no cement concrete) , Asian Journal of Civil Engineering (Building and Housing) 13, 6, 2012, 841-853.
[19] D.B. Raijiwalaand H. S.Patil, Geopolymer concrete: a concrete of next decade , Journal of Engineering Research and Studies, II, I, 2011 , 19-25.
[20] P. S.Deb, P. Nathand P. K.Sarker, Strength and permeation properties of slag blended fly ash based geopolymer concrete , Advanced Materials Research, 651,2013 , 168-173. 
[21] M.Albitar, P.Visintin, M. S.Mohamed Ali, and M.Drechsler, Assessing behaviour of fresh and hardened geopolymer concrete mixed with class-f fly ash , KSCE Journal of Civil Engineering, 19, 2015,1445–1455.
[22] J. Aldredand J.Day, Is geopolymer concrete a suitable alternative to traditional concrete? , 37th Conference on Our World in Concrete and Structures, 29-31, August, 2012.
[23]  D.Hardjito, S. E.Wallah, D. M.Sumajouw, and V.Rangan, Fly ash-based geopolymer concrete , Australian Journal of Structural Engineering, 6, 1, 2005, 1-9.
[24] K.Neupane, Investigation on modulus of elasticity of powder-activated geopolymer concrete , International Journal of Structural Engineering, 7, 3, 2016 , 262-278.
[25] A.Fernandez-Jimenez, A. Palomoand C.Lopez-Hombrados, Engineering properties of alkali-activated fly ash , ACI Materials Journal, 103, 2, 2006 ,106-112.
[26]  R.Prakash, Mechanical Properties and Flexural Performance of Geopolymer Concrete , International Research Journal of Engineering and Technology (IRJET), 4, 6, 2017,  5720-5724.
[27] P. Nathand P. K.Sarker, Flexural strength and elastic modulus 1 of ambient-cured blended low calcium fly ash geopolymer concrete , Construction and Building Materials, 130, 2017 , 22-31.