Geopolymerisation of un-calcined kaolin by the novel heat curing method
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In this study, heat curing technique (up to 320 oC) that allows the usage of sodium silicate solutions with un-calcined kaolinsto offer a durable geopolymeric binder in a short time was investigated. Samples containing up to 40 wt.% binder have beenproduced to observe the binder behaviour over a wide range of additions by heat curing for one hour. The cured samplesconsist of kaolinite and amorphous phase and crystallinity was decreased with increasing curing temperatures. 240 oC was thethreshold temperature for the strength development of the samples. Condensation reactions between Al-OH- units in uncalcinedkaolin and silanol groups in sodium silicate solution that yield sialate (Si-O-Al-O) bridges detected by infraredanalyses are the considered mechanisms of promoter effects of kaolinite. Optimum compressive strength (23.4 MPa.) wasobtained with the samples produced with 20 wt.% binder addition and 300 oC curing temperature.
Abstract
In this study, heat curing technique (up to 320 oC) that allows the usage of sodium silicate solutions with un-calcined kaolinsto offer a durable geopolymeric binder in a short time was investigated. Samples containing up to 40 wt.% binder have beenproduced to observe the binder behaviour over a wide range of additions by heat curing for one hour. The cured samplesconsist of kaolinite and amorphous phase and crystallinity was decreased with increasing curing temperatures. 240 oC was thethreshold temperature for the strength development of the samples. Condensation reactions between Al-OH- units in uncalcinedkaolin and silanol groups in sodium silicate solution that yield sialate (Si-O-Al-O) bridges detected by infraredanalyses are the considered mechanisms of promoter effects of kaolinite. Optimum compressive strength (23.4 MPa.) wasobtained with the samples produced with 20 wt.% binder addition and 300 oC curing temperature.
참고문헌 (44)
- J. Davidovits, , J. Therm. Anal, 37, pp.1633~1656 (1991)
- Qingbo Tian, "Influences of characteristics of the alkaline activator on the compressive strength and microstructure of the fly ash-based geopolymer pastes", Journal of Ceramic Processing Research, 21(3), pp.358~364 (2020), 청정에너지연구소[DOI]
- J. Davidovits, , Proceedings of the Geopolymer 2002Conference, pp.1~ (2002)
- C. Kuenzel, , J. Eur. Ceram. Soc, 33, pp.251~258 (2013)
- S. Yaşın, , J. Aust. Ceram. Soc, 55, pp.587~593 (2019)
- Yoorim Rho, "Characterization of metakaolin-based lightweight geopolymers with various foaming agents", Journal of Ceramic Processing Research, 21, pp.74~80 (2020), 청정에너지연구소[DOI]
- Zhilei Chen, "Study on properties of geopolymer-polyurethane sponge composite", Journal of Ceramic Processing Research, 19(5), pp.419~423 (2018), 청정에너지연구소[DOI]
- J. Davidovits, "U.S. Patent No. US4349386A", ~ (1982)
- J. Davidovits, , J. Ceram. Sci. Technol, 8, pp.335~350 (2017)
- M. Asadi, "Synthesis and microstructural properties of a geopolymer cement with high silica materials", Journal of Ceramic Processing Research, 13(4), pp.425~428 (2012), 청정에너지연구소[DOI]
- A. Elimbi, , Constr. Build. Mater, 25, pp.2805~2812 (2011)
- B. B. Kenne Diffo, , J. Asian. Ceram. Soc, 3, pp.130~138 (2015)
- V. Medri, , Appl. Clay. Sci, 50, pp.538~545 (2010)
- J. Davidovits, , Ceram. Eng. Sci. Proc, 38, pp.201~214 (2018)
- C. Y. Heah, , Int. J. Miner. Metall. Mater, 20, pp.313~322 (2013)
- F. Slaty, , Appl. Clay. Sci, 75-76, pp.120~125 (2013)
- A. D. Hounsi, , Constr. Build. Mater, 42, pp.105~113 (2013)
- P. Ghosh, , Int. J. Geotech. Eng, 10, pp.377~386 (2016)
- H. Roggendorf, , J. Non. Cryst. Solids, 293-295, pp.752~757 (2001)
- L. Zaretskiy, , Inter. Metalcast, 13, pp.58~73 (2019)
- L. Chen, , Materials, 9, pp.767~ (2016)
- M. Arnoult, , J. Non Cryst. Solids, 495, pp.59~66 (2018)
- J. Davidovits, , Proceedings First International Conference on Alkaline Cements and Concretes, pp.131~ (1994), VIPOL Stock Company Press
- H. J. Zhuang, , Procedia Eng, 210, pp.126~131 (2017)
- A. Burian, "Patent No. CZ2016459A3", ~ (2018)
- M. Vykoukal, , Arch. Foundry Eng, 19, pp.109~116 (2019)
- H.J. Twardowska, "World Patent No. WO1995026321A1", ~ (1995)
- S. Yaşın, , Proceedings International Iron and Steel Symposium (UDCS’21), pp.154~ (2021), Karabük University Press
- M. Davidovics, "European Patent No. EP0101714B1", ~ (1987)
- C. Boutterin, , Geopolymer’88, pp.79~ (1988), Geopolymer Institute Press
- M.M. Davidovics, "U.S. Patent No. US20130130886A1", ~ (2013)
- J. Davidovits, , Proceedings of the World Congress Geopolymer, pp.9~ (2005), Geopolymer Institute Press
- S. Lucas, , J. Non. Cryst. Solids, 357, pp.1310~1318 (2011)
- P. He, , Ceram. Int, 37, pp.59~63 (2011)
- A. Elimbi, , Ceram. Int, 40, pp.4515~4520 (2014)
- M. Steinerova, , Ceram-Silikaty, 55, pp.362~372 (2011)
- A. Marsh, , Microporous Mesoporous Mater, 264, pp.125~132 (2018)
- B. Zhang, , J. Mater. Sci, 44, pp.4668~4676 (2009)
- V. F. F. Barbosa, , Mater. Res. Bull, 38, pp.319~331 (2003)
- Z. Yunsheng, , Appl. Clay. Sci, 47, pp.271~275 (2010)
- Y. M. Liew, , Constr. Build. Mater, 30, pp.794~802 (2012)
- I. Lancellotti, , J. Solid State Chem, 200, pp.341~348 (2013)
- V. F. F. Barbosa, , Int. J. Inorg. Mater, 2, pp.309~317 (2000)
- D. Zaharaki, , J. Mater. Sci, 45, pp.2715~2724 (2010)