The Investigation on Setting Time and Strength of High Calcium Fly Ash Based Geopolymer

Abstract:

Article Preview

Fly ash based geopolymer normally gets the optimum strength by heat curing. This is considered as a hindrance to in-situ applications. Therefore, development of fly ash based geopolymer that suitable for ambient curing will widen the application to the concrete structure. This paper reports the results of an experimental study on setting time and development of compressive strength of class C fly ash based geopolymer paste produced in ambient curing condition. The main synthesis parameters such as water to the geopolymer solid ratio, alkali to cementitious ratio and molarity of NaOH were varied to understand their individual effect on setting time and the mechanical properties of the resulting geopolymer. The results suggested that generally the setting time increased with the NaOH molarity and the compressive strength of 59 MPa was obtained for geopolymer mixture cured at ambient temperature for 28 days with alkali to a cementitious ratio of 0.35 and 10 M NaOH. The results will be useful for developing the knowledge of the use of high calcium fly ash in producing geopolymer. This would be beneficial to the understanding the future applications of this material as new binding material.

Info:

Periodical:

Edited by:

Djoko Legono, Radianta Triatmaja, Prof. Priyosulistyo, Veerasak Likhitruangsilp, Lim Pang Zen, Teuku Faisal Fathani, Ali Awaludin, Intan Supraba, Imam Muthohar, Dr. Endita, Fikri Faris and Dr. Inggar Septhia Irawati

Pages:

158-164

Citation:

R. Cornelis et al., "The Investigation on Setting Time and Strength of High Calcium Fly Ash Based Geopolymer", Applied Mechanics and Materials, Vol. 881, pp. 158-164, 2018

Online since:

May 2018

Export:

Price:

$38.00

* - Corresponding Author

[1] J. Davidovits, F.A. Iaga, Fabrication of Stone Objects, by Geopolymeric Synthesis, in The Pre-Incan Huanka Civilisation (Peru), 21st International Symposium for Archaeometry Brookhaven National Laboratory, New York, (1981).

[2] J.G.S.D. van Jaarsveld, Effect of the alkali metal activator on the properties of fly ash-based geopolymers, Ind. Eng. Chem. Res.  38(10) (1999) 3932–3941.

DOI: https://doi.org/10.1021/ie980804b

[3] J. Davidovits, Geopolymers: inorganic polymeric new materials, Journal of Thermal Analysis. 37 (1991) 1633–1656.

DOI: https://doi.org/10.1007/bf01912193

[4] Ministry of Energy and Mineral Resources of the Republic of Indonesia, Indonesia Electricity Development Plan and Indonesia Coal-Ash Management Implementation, International Coal Based Power Conferences 2016, New Delhi, (2016).

[5] ASTM International, ASTM C618-12a: Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use, ASTM International, United States, (2014).

DOI: https://doi.org/10.1520/c0618-00

[6] P. Chindaprasirt, P.D. Silva, K. Sagoe-Crentsil, S. Hanjitsuwan, Effect of SiO2 and Al2O3 on the setting and hardening of high calcium fly ash-based geopolymer systems, Journal of Materials Science. 47(12) (2012) 4876–4883.

DOI: https://doi.org/10.1007/s10853-012-6353-y

[7] P. Chindaprasirt, Workability and strength of coarse high calcium fly ash geopolymer, Cement and Concrete Composites. 29 (2007) 224–229.

DOI: https://doi.org/10.1016/j.cemconcomp.2006.11.002

[8] U. Rattanasak, K. Pankhet, P. Chindaprasirt, Effect of chemical admixtures on properties of high-calcium fly ash geopolymer, International Journal of Minerals, Metallurgy, and Materials. 18(3) (2011) 364–369.

DOI: https://doi.org/10.1007/s12613-011-0448-3

[9] S. Hanjitsuwan, S. Hunpratub, P. Thongbai, S. Maensiri, V. Sata, Cement & concrete composites effects of NaOH concentrations on physical and electrical properties of high calcium fly ash geopolymer paste, Cement and Concrete Composites. 45 (2014).

DOI: https://doi.org/10.1016/j.cemconcomp.2013.09.012

[10] D. Hardjito, B.V. Rangan, Development and properties of low-calcium fly ash-based geopolymer concrete, Research Report, Curtin University of Technology, Perth, (2005).

[11] B.V. Rangan, Geopolymer concrete for environmental protection, The Indian Concrete Journal. 88(4) (2014) 41-59.

[12] Z. Xie, Y. Xi, Hardening mechanisms of an alkaline-activated class F fly ash, Cement and Concrete Research. 31(9) (2001) 1245–1249.

DOI: https://doi.org/10.1016/s0008-8846(01)00571-3

[13] P. Nath, P.K. Sarker, Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature, Cement and Concrete Composites. 55 (2015) 205–214.

DOI: https://doi.org/10.1016/j.cemconcomp.2014.08.008

[14] ASTM International, ASTM C305-06: Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars, ASTM International, United States, (2009).

[15] ASTM International, ASTM C191-04a: Time of Setting of Hydraulic Cement by Vicat Needle, ASTM International, United States, (2008).

[16] ASTM International, ASTM C109/C109-07: Compressive Strength of Hydraulic Cement Mortars ( Using 2-in or [ 50-mm ] Cube Specimens ) 1, ASTM International, United States, (2008).

DOI: https://doi.org/10.1520/c0109_c0109m-11b

[17] P. Topark-ngarm, P. Chindaprasirt, V. Sata, Setting time, strength, and bond of high-calcium geopolymer concrete, Journal of Materials in Civil Engineering. 27(7) (2015) 1–7.

DOI: https://doi.org/10.1061/(asce)mt.1943-5533.0001157

[18] A.R.M. Ridzuan, A.A. Khairulniza, M.F. Arshad, Effect of sodium silicate types on the high calcium geopolymer concrete, Materials Science Forum. 803 (2015) 185-193.

DOI: https://doi.org/10.4028/www.scientific.net/msf.803.185

[19] J.G.S. van Jaarsveld and J.S.J. van Deventer, Effect of the alkali metal activator on the properties of fly ash-based geopolymers, Ind. Eng. Chem. Res. 38(10) (1999) 3932–3941.

DOI: https://doi.org/10.1021/ie980804b

Fetching data from Crossref.
This may take some time to load.