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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 578-579Cement-Free Mortar Using Ground Granulated...

Cement-Free Mortar Using Ground Granulated Blast-Furnace Slag with Different Alkali-Activators

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Abstract:

The present study concerns a development of cement-free concrete using ground granulated blast-furnace slag (GGBS) with alkali-activators such as KOH, NaOH, and Ca (OH)₂. To find out the development among three different activators, the concentration of hydroxyl ion was kept 0.5%, 1.0%, 1.5%, 2.0% and 3.0% by weight of binder irrespective of cations. The setting time was measured by penetration resistance immediately after casting of mortar. The development of compressive strength was measured at 7, 14, 28, and 91 days. The pore structure of cement-free mortar was examined by the mercury intrusion porosimetry (MIP) and rapid chloride penetration test (RCPT). Simultaneously, grew sample was used to microscopically observe at the XRD. For strength of cement-free mortar, mixed with KOH or NaOH was as high as OPC at 3.0 % by weight of binder. However, the compressive strength of cement-free concrete mixed with 3.0 % Ca (OH)₂ by weight of binder had just half strength of OPC mortar. Cement-free concrete activated with NaOH and Ca (OH)₂ had higher total pore volume, however, it had lower ionic penetrability due to the pore type which mostly consist of gel pores. For pore structure of cement-free mortar mixed with KOH, the total volume had similarity to that of OPC mortar, however, it had lower penetrability. Therefore, it may have higher resistance to chloride transport than that of OPC mortar.

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Periodical:

Applied Mechanics and Materials (Volumes 578-579)

Pages:

1430-1440

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.578-579.1430

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Online since:

July 2014

Authors:

Joon Woo Park, Sung In Hong, Hee Jun Yang, Thamara Tofeti Lima, Ki Yong Ann*

Keywords:

Alkali-Activator, GGBS, Hydroxyl Ion, OPC, Permeability, Pore Structure

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* - Corresponding Author

[1] H.S. Lee, LCCO2 Assessment of concrete and CO2 reducing technology, In: concrete andenvironment, KorConcrInst(2010), P. 180-199.

[2] M. Thomas, Chloride thresholds in marine concrete, CemConcrResVol. 26 (1996), p.513.

[3] S. Rasheeduzafar, S.E. Hussain and S.S. Al-Saadoum, Effect of cement composition on chloride binding and corrosion of reinforcing steel in concrete, CemConcr Res 1991, vol. 21, p.777.

DOI: 10.1016/0008-8846(91)90173-f

[4] J.S. Ryou and K.Y. Ann, Variation in the chloride threshold level for steel corrosion in concrete arising from different chloride sources, MagConcr ResVol. 60(2008), vol. 60, p.177.

DOI: 10.1680/macr.2008.60.3.177

[5] S.W. Pack, M.S. Jung, H.W. Song, S.H. Kim and K.Y. Ann, Prediction of time dependent chloride transport in concrete structures exposed to a marine environment, CemConcr Res Vol. 26 (2010), pp.302-3012.

DOI: 10.1016/j.cemconres.2009.09.023

[6] R.K. Dhir, M.A.K. El-Mohr and T.D. Dyer, Chloride binding in GGBS concrete, CemConcr Res Vol. 26 (1996), pp.1767-1773.

DOI: 10.1016/s0008-8846(96)00180-9

[7] H. F. W. Taylor. in"Cement chemistry"Academic Press London, (1990), in press.

[8] A. Katz, Microscopic study of alkali-activation fly ash, CemConcr Res Vol. 28 (1998), pp.197-208.

[9] H. Wang, H. Li, and F. Yang, Synthesis and mechanical properties of metakaolinite-based geopolymer, Colloids Surf Vol. 268 (2005), pp.1-6.

[10] F. Massazza, in: Pozzolana and Pozzolanic Cements, edited by P. C. Hewlett, Lea's Chemistry of Cement and Concrete, chapter 10, Butterworth Heinemann (2008).

DOI: 10.1016/b978-075066256-7/50022-9

[11] W.K.W. Lee, and J.S.J. van Deventer, The effect of ionic contaminants on the early-age properties of alkali-activated fly ash-based cements, CemConcr Res Vol 32 (2002), pp.577-584.

DOI: 10.1016/s0008-8846(01)00724-4

[12] A. Palomo, M.W. Grutzek, and M. T Blaco, Alkali-activated fly ashes. A cement for the future. CemConcr Res Vol. 29 (1999), pp.1323-1329.

DOI: 10.1016/s0008-8846(98)00243-9

[13] N.G. Lim, S.W. Jeong, J.W. Her, and K.Y. Ann, Properties of cement-free concret cast by finely grained nanoslag with the NaOH-based alkali activator, Con Build Mat Vol. 35 (2012), pp.557-563.

DOI: 10.1016/j.conbuildmat.2012.04.012

[14] K.Y. Ann, J.H. Kim, and S.Y. Song, Development of cement-free concrete using finely grained slag for Portland cement, App Mech Mat Vol. 316-317 (2013), pp.1063-1070.

DOI: 10.4028/www.scientific.net/amm.316-317.1063

[15] F. Puertas, S. Martinez-ramirez, S. Alonso, and T. Vasquez, Alkali activated fly ash/slag cement. Strength behavior and tydration products, CemConcre Res Vol. 30 (2000), pp.1625-1632.

DOI: 10.1016/s0008-8846(00)00298-2

[16] Z. Xie, and Y. XI, Hardening mechnisms of an alkaline-activated class F fly ash. CemConcre Res Vol. 31 (2002), pp.1245-1249.

[17] S. Song, D. Sohn, H.M. Jennings, and T.O. Mason, Hydration of alkali activated ground granulated blast furnace slag, Mater Sci Vol. 35 (2004), pp.249-257.

[18] S. Song, and H.M. Jennings, Pore solution chemistry of alkali-activated ground granulated blast furnace slag, CemConcr Res Vol. 29 (1999), pp.159-170.

[19] K. Kalliopi, and Aligizaki. in: Pore Structure of cement-based materials testing, interpretation and requirements, Modern Concrete Technology 12, chapter, 3CRC Press (2006).

[20] F. Pacheco-Torgal, J. Castro-Gomes, and S. Jalali, 'Alkali activated binders: A review Part 1. Historical back ground, terminology, reaction mechanisms and hydration products, Con Buil Mat Vol. 22 (2008), pp.1305-1314.

DOI: 10.1016/j.conbuildmat.2007.10.015

[21] C. Arya, N.R. Buenfeld, and J.B. Newman, Assessment of simple methods of determining the free chloride content of cement paste, CemConcre Res Vol. 17(6) (1987), pp.907-918.

DOI: 10.1016/0008-8846(87)90079-2

[22] P. Lambert, C.L. Page, and N.R. Short, Pore solution chemistry of the hydrated sustemtricalcium silicate, sodium chloride and water, CemConcre Res Vol. 15(4), (1985), pp.675-680.

DOI: 10.1016/0008-8846(85)90068-7

[23] H. Zibara, Binding of external chlorides by cement pastes, Ph.D. thesis, University of Toronto, Toronto, Ont.

[24] H.W. Song, C. H Lee, M.S. Jung, and K.Y. Ann, Development of chloride binding capacity in cement pastes and influence of the pH of hydration products, Can J CivEng Vol. 35, (2008), pp.1427-1434.

DOI: 10.1139/l08-089

[25] M.V.A. Florea and H.J.J. Brouwers, Chloride binding related to hydration products Part 1: Ordinary Portland Cement, CemConcr Res Vol. 42, (2012), pp.282-290.

DOI: 10.1016/j.cemconres.2011.09.016

[26] D. N. Winslow, S. Diamond, A mercury porosimetry study of the evolution of porosity in Portland cement, J Mat, Vol. 15 (1970), pp.564-585.

[27] B.K. Nyame, and J.M. Illston, Capillary pore structure and permeability of hardened cement paste, in Proceedings of the Seventh International Congress on the Chemistry of Cement, Paris Vol. 3, (1980), pp.181-186.

[28] Z. Kiu, D. and Winslow, Sub-distributions of pore size: a new approach to correlate pore structure with permeability, CemConcr Res Vol. 25 (1975), pp.769-778.

DOI: 10.1016/0008-8846(95)00067-m