Effect of Plasticizers and Water on Properties of HCFA Geopolymers

Abstract:

In this study, different types of plasticizers were used to investigate their effects on the fresh and hardened properties of high calcium fly ash geopolymers (HCFA). Modified polycarboxylate polymers (G3) and lignin-based polymers (G1) were used as plasticizing admixtures and the results were compared to the effect of tap water addition. The results showed that all the admixtures used are effective in increasing the workability of the HCFA geopolymers mixtures and the workability increased by 25-48% compared to the control mixtures. However, the use of G3 has adversely affected the strength by a reduction of 20%. While the use of G1 reduced the final setting time by 7% which is critical in the case of HCFA geopolymers where the final setting time occurs within 70 minutes. Water can be considered as the best admixture in terms of cost, setting time, and effect on compressive strength and it can be used where medium workability enhancement is required.

• Periodical: Key Engineering Materials (Volume 733)
• Pages: 76-79
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.733.76
• Online since: March 2017
• Authors: Ahmad B. Malkawi*, Mohd Fadhil Nuruddin, Amir Fauzi, Hashem Al-Mattarneh, Bashar S. Mohammed
• Keywords: Admixtures, Compressive Strength, Fly Ash, Geopolymer, Setting Time, Superplasticizer, Workability

References

[1] L. K. Turner and F. G. Collins: Construction and Building Materials vol. 43 (2013), pp.125-130.

[2] Nuruddin, M. F., Malkawi, A. B., Fauzi, A., Mohammed, B. S. & Almattarneh, H. M. Evolution of geopolymer binders: a review. IOP Conf. Series: Materials Science and Engineering, (2016).

DOI: 10.1088/1757-899x/133/1/012052

[3] Fauzi, A., Nuruddin, M. F., Malkawi, A. B. & Abdullah, M. M. A. B. 2016. Study of Fly Ash Characterization as a Cementitious Material. Procedia Engineering, 148, 487-493.

DOI: 10.1016/j.proeng.2016.06.535

[4] K. Erdogdu, M. and Tokyay: Cement and Concrete Research vol. 29 (1999), pp.743-746.

[5] M. Seddik Meddah: Construction and Building Materials, vol. 79 (2015), pp.73-82.

[6] Z. Zhang, B. Zhang, and P. Yan: Construction and Building Materials, vol. 105 (2016), pp.82-93.

[7] P. C. Aïtcin: in Science and Technology of Concrete Admixtures, Woodhead Publishing (2016), pp.53-73.

[8] N. Kabay, M. M. Tufekci, A. B. Kizilkanat, and D. Oktay: Construction and Building Materials, vol. 85 (2015), pp.1-8.

[9] S. Chowdhury, M. Mishra, and O. Suganya: Ain Shams Engineering Journal vol. 6 (2015), pp.429-437.

[10] Malkawi, A. B., Nuruddin, M. F., Fauzi, A., Almattarneh, H. & Mohammed, B. S. 2016. Effects of Alkaline Solution on Properties of the HCFA Geopolymer Mortars. Procedia Engineering, 148, 710-717.

DOI: 10.1016/j.proeng.2016.06.581

[11] T. Xie and T. Ozbakkaloglu: Ceramics International vol. 41 (2015), pp.5945-5958.

[12] P. K. Sarker and S. McBeath: Construction and Building Materials vol. 90 (2015), pp.91-98.

[13] N. Ganesan, R. Abraham, and S. Deepa Raj: Construction and Building Materials vol. 93 (2015), pp.471-476.

DOI: 10.1016/j.conbuildmat.2015.06.014

[14] Nuruddin, M. F., Malkawi, A. B., Fauzi, A., Mohammed, B. S. & Almattarneh, H. M. Geopolymer concrete for structural use: Recent findings and limitations. IOP Conf. Series: Materials Science and Engineering, (2016).

DOI: 10.1088/1757-899x/133/1/012021

[15] M. Talha Junaid, O. Kayali, A. Khennane, and J. Black: Construction and Building Materials vol. 79 (2015), pp.301-310.

DOI: 10.1016/j.conbuildmat.2015.01.048

[16] K. Ramujee: International Journal of Engineering and Technology vol. 6 (2014), pp.1-4.

[17] ASTM C618-15, ASTM International, West Conshohocken, PA, (2015).

[18] "ASTM C305-14, ASTM International, West Conshohocken, PA, (2014).

[19] "ASTM C807-13, ASTM International, West Conshohocken, PA, (2013).

[20] "ASTM C230 / C230M-14, ASTM International, West Conshohocken, PA, (2014).

[21] "ASTM C109 / C109M-13e1, ASTM International, West Conshohocken, PA, (2013).

[22] B. Nematollahi and J. Sanjayan: Materials & Design, vol. 57, pp.667-672, (2014).