Evaluation on Microstructure Stability and Thermal Resistant Ability at High Temperature of Ternary-Blended Geopolymer

Abstract:

Stability of microstructure and heat resistant ability at high temperature is one of the important properties in ceramics or silicate materials which are normally exposed with fire such as refractories and insulation or other materials used in furnaces. This study used a ternary-blended geopolymer which was synthesized from an optimized mixture of red mud (RM), rice husk ash (RHA), diatomaceous earth (DE), and water glass solution (WGS) with silica modulus of 2.5. The geopolymer samples were tested thermal properties of heat resistance (%), volumetric shrinkage (%), mass loss (%) at 1000°C to evaluate thermal resistant ability. Changes of microstructure of the ternary-blended geopolymer samples were also characterized before and after exposed at high temperature using methods of X-ray diffraction (XRD), Thermogravimetric analysis or thermal gravimetric analysis (DTA-TGA), and Scanning electron microscope (SEM). The experimental results showed the ternary-blended geopolymer has high thermal stability and unchanged microstructure even at high temperatures. Hence, the geopolymer in this study is suggested to apply as an insolation with the upper limit of temperature to work at 1000°C.

• Periodical: Solid State Phenomena (Volume 321)
• Pages: 73-79
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.321.73
• Online since: July 2021
• Authors: Hoc Thang Nguyen*
• Keywords: Diatomaceous Earth (DE), Geopolymer, Heat Resistant Ability, Red Mud (RM), Rice Husk Ash (RHA), Stability of Microstructure

References

[1] L. Smith and F. Placido, Thermoliminescence: A comparison with the residual strength of various concrete, Fire safety of concrete structures, ACI 80 (1983) 293-304.

[2] K.D. Hertz, Residual properties of concrete heated rapidly, Evaluation and Repair fire damage to concrete, ACI 92 (1986) 143-152.

[3] T.T. Lie, T.J. Rowe, and T.D. Lin, Residual strength of fire-exposed reinforced concrete columns, ACI 92 (1986) 153-174.

[4] R. Jansson, Thermal stress cause spalling, Branpostend 33 (2006) 24-25.

[5] V.Q. Le, M.Q. Do, M.D. Hoang, T.P. Dang, T.H. Bui, H.T. Nguyen, Evaluation on Roles of Activated Silicon and Aluminum Oxides for Formation of Geopolymer from Red Mud and Silica Fume, Key Engineering Materials, 777 (2018) 513-517.

DOI: 10.4028/www.scientific.net/kem.777.513

[6] H.T. Nguyen, H.L.N. Nguyen, T.N.U. Vo, T.K. Pham, Novel materials synthesized from red mud, bagasse, and bentonite for gas treatment by CO2 absorption, MATEC Web of conferences 207, 03005 (2018).

DOI: 10.1051/matecconf/201820703005

[7] H.T. Nguyen, T.N. Le, V.T.H.Q. Pham, Development of heat resistant geopolymer-based materials from red mud and rice husk ash, AIP Conf. Proc. 1954 (1) (2018) 040005.

[8] V.Q. Le, M.Q. Do, H.T. Nguyen, Effect of Alkaline Activators to Engineering Properties of Geopolymer-Based Materials Synthesized from Red Mud, Key Eng. Mat. 777 (2018) 508-512.

DOI: 10.4028/www.scientific.net/kem.777.508

[9] Q.M. Do, T.H. Bui, H.T. Nguyen, Effects of Seawater Content in Alkaline Activators to Engineering Properties of Fly Ash-Based Geopolymer Concrete, Sol. Sta. Phe. 296 (2019) 105-111.

DOI: 10.4028/www.scientific.net/ssp.296.105

[10] P.T. Kien, T.T.T. Ly, N.H. Thang, M.M.A.B. ABDULLAH, A Novel Study on Using Vietnam Rice Hush Ash and Cullet as Environmental Materials, MATEC Web of Conferences 97, 1-6.

DOI: 10.1051/matecconf/20179701118

[11] H.T. Nguyen, Evaluation on Formation of Aluminosilicate Network in Ternary-Blended Geopolymer Using Infrared Spectroscopy, Solid State Phenomena 296 (2019) 99-104.

DOI: 10.4028/www.scientific.net/ssp.296.99

[12] H.T. Nguyen, V.T.H.Q. Pham, Leachability of heavy metals in geopolymer-based materials synthesized from red mud and rice husk ash, AIP Conf. Proc. 1954 (1) (2018) 040014.

DOI: 10.1063/1.5033414

[13] H.T. Nguyen, V.T.H.Q. Pham, T.N. Le, T.P. Dang, N.K.T. Nguyen, Utilization of red mud and bagasse for production of gas absorption materials, AIP Conf. Proc. 1954 (1) (2018) 040010.

[14] H.T. Nguyen, V.Q. Le, T.H. Bui, Leaching Behavior and Immobilization of Heavy Metals in Geopolymer Synthesized from Red Mud and Fly Ash, Key Eng. Mat., 777 (2018) 518-522.

DOI: 10.4028/www.scientific.net/kem.777.518

[15] H.T. Nguyen, N.H. Nguyen, V.T.H.Q. Pham, Engineering properties of lightweight geopolymer synthesized from coal bottom ash and rice husk ash, AIP Conf. Proc. 1954 (1), 040009.

DOI: 10.1063/1.5033409

[16] H.T. Nguyen, Synthesis and Characteristics of Inorganic Polymer Materials Geopolymerized from Ash of Brickyard, Materials Science Forum 961 (2019) 45-50.

DOI: 10.4028/www.scientific.net/msf.961.45

[17] J.T. Kloprogge, R.L. Frost, Thermal decomposition of bauxite minerals: infrared emission spectroscopy of gibbsite, boehmite and diaspora, J. of Mat. Sci. 37 (6) (2002) 1121-1129.