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2019 Vol.29, Issue 11 Preview Page
Effects of Chemical Composition of Ca(OH)2 and Precursors on the Properties of Fast-Curing Geopolymers

Ca(OH)2와 전구체의 화학 조성이 고속경화 지오폴리머의 물성에 미치는 영향

Hyunseok Ko1
,
Jung Young Noh2
,
Hyung Mi Lim1†
고 현석1
,
노 정영2
,
임 형미1†
1Convergence Technology Division, Korea Institute of Ceramic Engineering and Technology, Republic of Korea
2Department of Metallurgical and Materials Engineering, Gyeongsang National University, Republic of Korea
1한국세라믹기술원 융합기술사업단
2경상대학교 나노신소재공학부 금속재료공학과
†Corresponding author E-Mail : lim@kicet.re.kr (H. M. Lim, KICET)
November 2019. pp. 690-696
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Abstract

Geopolymer is an alumina silicate-based ceramic material that has good heat-resistance and fire-resistance; it can be cured at room temperature, and thus its manufacturing process is simple. Geopolymer can be used as a reinforcement or floor finish for high-speed curing applications. In this manuscript, we investigate a high-speed curing geopolymer achieved by adding calcium to augment the curing rate. Metakaolin is used as the main raw material, and aqueous solutions of KOH and K2SiO3 are used as the activators. As a result of optimizing the high bending strength as a target factor for geopolymers with SiO2 / Al2O3 ratio of 4.1 ~ 4.8, the optimum ranges of the active agent are found to be 0.1 ≤ K2O / SiO2 ≤ 0.4 and 10 ≤ H2O / K2O ≤ 32.5, and the optimum range of the curing accelerator is found to be 0.82 ≦ Ca (OH)2 / Al2O3 ≦ 2.87. The maximum flexural strength is found to be 1.35 MPa at Ca (OH)2 / Al2O3 = 2.82, K2O / SiO2 = 0.3, and H2O / K2O = 11.3. The physical and thermal properties are analyzed to validate the applicability of these materials as industrial insulating parts or repairing·finishing materials in construction.

Keywords
geopolymer
fast-curing
calcium
metakaolin
heat resistance
References
1.
J. A. Davidovits, Geopolymer Cement Review 2013, p.1-11, Technical papers #21, Geopolymer Institute, France (2013).10.1520/STP156620120106
2.
A. Natali, S. Manzi and M. C. Bignozzi, Procedia Eng., 21, 1124 (2011).10.1016/j.proeng.2011.11.2120
3.
B. Singh, G. Ishwarya, M. Gupta and S. Bhattacharyya, Constr. Build. Mater., 85, 78 (2015)10.1016/j.conbuildmat.2015.03.036
4.
P. He, D. Jia, B. Zheng, S. Yan, J. Yuan, Z. Yang, X. Duan, J. Xu, P. Wang and Y. Zhou, Ceram. Int., 42, 5345 (2016)10.1016/j.ceramint.2015.12.067
5.
T. Lin, D. Jia, P. He, M. Wang and D. Liang, Mater. Sci. Eng., A, 497, 181 (2008).10.1016/j.msea.2008.06.040
6.
S. Yan, P. He, Y. Zhang, D. Jia, J. Wang, X. Duan, Z. Yang and Y. Zhou, Ceram. Int., 43, 549 (2017).10.1016/j.ceramint.2016.09.192
7.
J. Yuan, P. He, D. Jia, S. Yan, D. Cai, L. Xu, Z. Yang, X. Duan, S. Wang and Y. Zhou, Y. Ceram. Int., 42, 5345 (2016).10.1016/j.ceramint.2015.12.067
8.
Y.-M. Liew, C.-Y. Heah and H. Kamarudin, Prog. Mater. Sci., 83, 595 (2016).10.1016/j.pmatsci.2016.08.002
9.
W. M. Kriven, J. L. Bell and M. Gordon, Ceram. Trans., 153, 227 (2003).
10.
T. Matschei, B. Lothenbach and F. P. Glasser, Cement Concrete Res., 37, 551 (2014).10.1016/j.cemconres.2006.10.013
Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 29
  • No :11
  • Pages :690-696
  • Received Date : 2019-10-01
  • Revised Date : 2019-10-11
  • Accepted Date : 2019-10-15
  • DOI :https://doi.org/10.3740/MRSK.2019.29.11.690
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