• Vol 6, No 3 (2015)
  • Metalurgy and Material Engineering

Thermal Effect on Flexural Strength of Geopolymer Matrix Composite with Alumina and Wollastonite as Fillers

Dwi Marta Nurjaya, Sotya Astutiningsih, Anne Zulfia


Cite this article as:

Nurjaya, D.M., Astutiningsih, S., Zulfia, A., 2015. Thermal Effect on Flexural Strength of Geopolymer Matrix Composite with Alumina and Wollastonite as Fillers. International Journal of Technology. Volume 6(3), pp. 462-470

136
Downloads
Dwi Marta Nurjaya Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, Indonesia
Sotya Astutiningsih Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, Indonesia
Anne Zulfia Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok, Depok 16424, Indonesia
Email to Corresponding Author

Abstract
image

The addition of alumina and wollastonite in geopolymer resin is expected to increase the thermal behavior of the geopolymer matrix composite. In this work, fine granules of solid alumina and acicular wollastonite used as filler were mixed with a fly ash-based geopolymer resin paste to form a composite matrix. The filler additions were 2.5% to 10.0% of the total weight with sodium silicates and sodium hydroxide used as activators. The results showed that the addition of alumina and wollastonite as filler did not have much effect on the flexural and compressive strength of the geopolymer matrix composite at room temperature. Wollastonite fiber, which was added in the form of a short-sized fiber, only produced a very small bridging effect. Nevertheless, alumina filler composite showed a good result after being exposed to a temperature at 200°C, although the strength was reduced as the temperature increased. Moreover, wollastonite fibers only managed to maintain 50% of their flexural strength after 2 hours exposure at a temperature of 200°C due to the damage of the wollastonite fiber.

Alumina; Composite, Flexural strength, Fly ash, Geopolymer, Wollastonite

References

Amuthakkannan, P., Manikandan, V., Jappes, J.T.W., Uthayakumar, M., 2013. Effect of Fibre Length and Fibre Content on Mechanical Properties of Short Basalt Fibre Reinforced Polymer Matrix Composites. Materials Physics and Mechanics, Volume 16, pp. 107-117

Auerkari, P., 1996. Mechanical and Physical Properties of Engineering Alumina Ceramics, VTT Manufacturing Technology. Research Notes 1792, pp. 8

Lin, T., Jia, D., He, P., Wang, D., Liang, D., 2008. Effects of Fiber Length on Mechanical Properties and Fracture Behavior of Short Carbon Fiber Reinforced Geopolymer Matrix Composites. Materials Science and Engineering A, Volume 497, pp. 181–185

Mingyu, Z., Xiaomin, Z., Fumei, L., 2009. Alkali-activated Fly Ash-based Geopolymers with Zeolite or Bentonite as Additives. Cement & Concrete Composites, Volume 31, pp. 762–768

Phoo-ngernkham, T., Chindaprasirt, P., Sata, V., Hanjitsuwan, S., Hatanaka, S., 2014. The Effect of Adding Nano-SiO2 and Nano-Al2O3 on Properties of High Calcium Fly Ash Geopolymer Cured at Ambient Temperature. Materials and Design, Volume 55, pp. 58–65

Thang, X.N., 2010. Microstructure and Flexural Properties of Geopolymer Matrix-Fibre Reinforced Composite with Additives of Alumina (Al2O3) Nanofibres. In: Proceedings of the 7th International Conference - TEXSCI 2010

Weston, R.M., Rogers, P.S., 1976. Anisotropic Thermal Expansion Characteristics of Wollastonite. Mineralogical Magazine, Volume 40(314), pp. 649-651


Table of Contents