Strength Enhancement, Ductility, and Confinement Effectiveness Index of Fly Ash-based Geopolymer Concrete Square Columns
Keywords:compressive strength, fly ash, geopolymer concrete, square column, tie spacing
Geopolymer concrete is an environmentally friendly construction material that has the potential to be applied in building structures. It is important to understand the structural behavior of geopolymer concrete. This paper presents an experimental investigation into the performance of structural elements of geopolymer concrete under concentric axial loads. The specimens were twelve square columns with a size of 170 x 170 mm and a height of 480 mm. The study variables were the tie spacing and the compressive strength of unconfined geopolymer concrete (f?c). The test results showed that the increase in f'cc was not as significant as the increase in unconfined concrete compressive strength (f'c). The value of strength enhancement (K) tended to decrease. The column ductility (m) and confinement effectiveness index (Ic) had optimum values. The effect of increasing the tie spacing (s) decreased the K, Ic, and m values of the column. The proposed f?cc formulation for geopolymer concrete is compatible.
Herwani, Pane I., Imran I. & Budiono B., Compressive Strength of Fly Ash-based Geopolymer Concrete with a Variable of Sodium Hydroxide (NaOH) Solution Molarity, Matec Web of Conferences, 147 (01004), 2018.
Simatupang, P.H., Imran, I., Pane, I. & Sunendar, B., On the Development of a Nomogram for Alkali Activated Fly Ash Material (AAFAM) Mixtures, Journal of Eng. Technol. Sci., 47(3), pp. 231-249, Aug. 2015.
Hardjito, D., Wallah, S.E., Sumajouw, D.M.J. & Rangan, B.V., On the Development of Fly Ash-Based Geopolymer Concrete, ACI Materials Journal, 101(6), pp. 467-472, Nov.-Dec. 2004.
Duxson, P., Ferndez-Jimez, A., Provis, J.L., Lukey, G.C., Palomo, A. & Van Deventer, J.S.J., Geopolymer Technology: The Current State of the Art, Journal of Materials Science. 42(9), pp. 2917-2933, May 2007.
Ma, C.K., Awang, A.Z. & Omar, W., Structural and Material Performance of Geopolymer Concrete: A Review, Construction and Building Materials, 186(), pp. 90-102, Jul. 2018.
Balamuralikrishnan, R. & Saravanan, J., Effect of Addition of Alccofine on the Compressive Strength of Cement Mortar Cubes, Emerging Science Journal, 5(2), pp.155-170, Apr. 2021.
Ganesan, N., Abraham. R., Deepa Raj, S. & Sasi, D., Stress?strain Behaviour of Confined Geopolymer Concrete, Construction and Building Materials, 73, pp. 326-331, 2014.
Ganesan, N., Abraham, R. & Deepa Raj, S., Experimental and Analytical Investigations on Geopolymer Concrete Columns under Repeated Axial Compression, Asian Journal of Civil Engineering, 16(5), pp. 651-662, 2015.
Muslikh, Anggraini, N.K., Hardjito D., & Antonius, Behavior of Geopolymer Concrete Confined by Circular Hoops, Matec Web of Conferences, 159 (01018), 2018.
Sumajouw, D.M.J., Hardjito, D., Wallah, S.E. & Rangan, B.V., Fly Ash-based Geopolymer Concrete: Study of Slender Reinforced Columns, Journal of Materials Science, 42, pp. 3124-3130, Jun 2006.
Rahman M.M. & Sarker P.K., Geopolymer concrete columns under combined axial load and biaxial bending, Proceedings of the Concrete Conference, October, Perth, Australia, 2011.
Sujatha, T., Kannapiran, K. & Nagan, S., Strength Assessment of Heat Cured Geopolymer Concrete Slender Columns, Asian Journal of Civil Engineering, 13(5), pp. 635-646, 2012.
Nhabih. H.T., Hussein., A.M. & Salman., M.M., Study a Structural Behavior of Eccentrically Loaded GFRP Reinforced Columns Made of Geopolymer Concrete, Civil Engineering Journal, 6(3), pp. 563-575, Mar. 2020.
Nguyen, P.D., Dang, V.H., Vu, N.A. & Eduardovich, P.A., Long-term Deflections of Hybrid GFRP/Steel Reinforced Concrete Beams under Sustained Loads, Civil Engineering Journal, 6(special issues), pp. 1-11, 2020.
Kristianto, A., Imran, I., Suardjana, M. & Pane, I., Confinement of Reinforced-Concrete Columns with Non-Code Compliant Confining Reinforcement Plus Supplemental Pen-Binder, Journal of Engineering Technology & Science, 44(3), pp. 220-237, Oct. 2012.
Saatcioglu, M. & Razvi, S.R., Strength and Ductility of Confined
Concrete, ASCE Journal of Structural Engineering, 118(6), pp. 1590-
, June 1992.
Sheikh, S.A.& Uzumeri, S.M., Strength and Ductility of Tied Concrete
Column, Proceedings, ASCE, 106(5), pp. 1079-1102, May 1980.
ASTM Committee C09.24, Standard Specification for
Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use
in Concrete (C618-15), ASTM International, USA, 2015.
Antonius, A. & Imran, I., Experimental Study of Confined Low-, Medium- and High-Strength Concrete Subjected to Concentric Compression, Journal of Eng. Technol. Sci., 44(3), pp. 252-269, Oct. 2012.
Saatcioglu, M. & Razvi, S.R., Displacement-Based Design of Reinforced Concrete Columns for Confinement, ACI Structural Journal, 99(1), pp. 3-11, Jan.-Feb. 2002.
Paultre, P. & Legeron, F., Confinement Reinforcement Design for Reinforced Concrete Columns, ASCE Journal of Structural Engineering, 134(5), pp. 738-749, May 2008.
Richart, F.E., Brandtzaeg, A. & Brown, R.L., The Failure of Plain and Spirally Reinforced Concrete in Compression, Univ. of Illinois Bulletin, XXVI(31), 190, 1929.
Haider, G.M., Sanjayan, J.G. & Ranjith, P.G., Complete Triaxial Stress?strain Curves for Geopolymer, Construction and Building Materials, 69, pp. 196-202, 2014.
Albitar, M., Ali, M.S.M. & Visintin, P., Experimental Study on Fly Ash and Lead Smelter Slag-based Geopolymer Concrete Columns, Construction and Building Materials, 141, pp. 104-112, 2017.
Elchalakani, M., Dong, M., Karrech, A., Li, G., Ali, M.S.M. & Yang, B., Experimental Investigation of Rectangular Air-Cured Geopolymer Concrete Columns Reinforced with GFRP Bars and Stirrups, Journal of Composites for Concrete, 23(3), 04019011, 1-11, Feb. 2019.
Nhabih, H.T., Hussein, A.M. & Salman, M.M., Study a Structural Behavior of Eccentrically Loaded GFRP Reinforced Columns Made of Geopolymer Concrete, Civil Engineering Journal, 6(3), pp. 563-575, Mar. 2020.
Sujatha, T., Behaviour and Strength Assessment of Flyash Based Geopolymer Concrete Columns, PhD Dissertation, Faculty of Civil Engineering., Anna University, Chennai, India, 2012.
Saranya, P., Nagarajan, P. & Shashikala, A.P., Behaviour of GGBS-dolomite Geopolymer Concrete Beam-column Joints under Monotonic Loading, Structures, 25, pp. 47-55, Feb. 2020.
Girgin, Z.C., Arioglu, N. & Arioglu, E., Evaluation of Strength Criteria for Very-High-Strength Concrete under Triaxial Compression, ACI Structural Journal, 104(3), pp. 278-284, May.2007.
Cusson, D. & Paultre, P., Stress-Strain Model for Confined High-Strength Concrete, Journal of Structural Engineering, 121(3), pp. 468-477, Mar. 1995.
Legeron, F. & Paultre, P., Uniaxial Confinement Model for Normal-and High-Strength Concrete Columns, Journal of Structural Engineering, 129(2), pp. 241-252, Feb. 2003.
Imran, I. & Pantazopoulou, S.J., Plasticity Model for Concrete under Triaxial Compression, Journal of Engineering Mechanics ASCE, 127(3), pp. 281-290, Mar. 2001.