Analysis by Means of Surface Response to Chemical Composition and Pozzolanic Reactivity of Ultrafine Treated Rice Husk Ash (UFTRHA) as Cementing Additive Material

  • Authors

    • Siti Asmahani Saad
    • Nasir Shafiq
    • Maisarah Ali
    • Mariana Mohamed Osman
  • Ultrafine Treated Rice Husk Ash (UFTRHA), Cementing Additive Material, Response Surface Method (RSM), high energy milling.
  • Pozzolanic reactive material is considered as one of the most essential characteristic of cementing additive material in concrete technology application. Normally, the reactive material contains abundant silica that enhances concrete strength activity. Undeniably, it is proven that rice husk ash (RHA) possesses large quantity of silica that induces the pozzolanic reaction in concrete. Nevertheless, usage of conventional RHA is still widely accepted in concrete industry nowadays. One of the setback of conventional RHA incorporation is simply because of its properties inconsistency. Therefore, enhancement on the RHA properties by introduction of a specific pretreatment prior to incineration process is expected to provide an alternative way in order to produce highly reactive cementing additive material from locally available agricultural by-product, the rice husk. In this paper, a total number of 30 experimental set points was conducted. Statistical analysis was conducted for four independent variables and two responses using Response Surface Method (RSM). The analysis was completed using a commercial software set (Design-Expert) for experimental design and analysis. The independent variables were HCl concentration, soaking time, burning temperature and soaking temperature. Meanwhile, the responses investigated in this study were including cumulative pozzolan percentage and electric conductivity decrement from 0 to 2 minutes. As for the statistical analysis of the data for response 1, the cumulative pozzolan percentage calculated from the model was in-line with the experimental data, with R-squared value of 0.9565. Hence, the result validates the precision of the model. On the other hand, the R-squared value for response 2 which is the EC decrement from 0 - 2 Minutes, it shows that the model was in agreement to the experimental values at 0.9342. Thus, it is again justifies the model accuracy.

  • References

    1. [1] Food and Agriculture Organization, Rice Market Monitor April 2016 (2016), available online:, last visit: 15 July 2018.

      [2] Kingsley KL (2010), Synthesis of High Purity Silicon from Rice Husks, University of Toronto.

      [3] Bazarghan A, Bazargan M. & McKay G (2015), Optimization of rice husk pretreatment for energy production, Renew. Energy, vol. 77, pp. 512–520.

      [4] Feng Q, Yamamichi H, Shoya M & Sugita S (2004), Study on the pozzolanic properties of rice husk ash by hydrochloric acid pretreatment, Cem. Concr. Res., vol. 34, no. 3, pp. 521–526.

      [5] Park C, Salas A, Chung CW, & Lee CJ (2014), Freeze-thaw resistance of concrete using acid-leached rice husk ash, KSCE J. Civ. Eng., vol. 18, no. 4, pp. 1133–1139.

      [6] Salas A, Delvastro S, Gutierrez RMD, & Lange D (2009), Comparison of two processes for treating rice husk ash for use in high performance concrete, Cem. Concr. Res., vol. 39, no. 9, pp. 773–778.

      [7] Park K, Kwon S & Wang X (2016), Analysis of the effects of rice husk ash on the hydration of cementitious materials, Constr. Build. Mater. Build. Mater., vol. 105, pp. 196–205.

      [8] Vayghan AG, Khaloo AR & Rajibipour F (2013), The effect of a hydrochloric acid pre-treatment on the physicochemical properties and pozzolanic performance of rice husk ash,†Cem. Concr. Compos., vol. 39, pp. 131–140.

      [9] Sankar S, Sharma SK, Kaur N, Lee B, Young D, Lee S & Jung H (2016), Biogenerated silica nanoparticles synthesized from sticky , red , and brown rice husk ashes by a chemical method, Ceram. Int., vol. 42, pp. 1–11.

      [10] Luxan MP, Madruga F, & Saavedra J (1989), Rapid Evaluation Of Pozzolanic Activity Of Natural Products, Cem. Concr. Res., vol. 19, pp. 63–68.

      [11] McCarter WJ & Tran D (1996), Monitoring pozzolanic activity by direct activation with calcium hydroxide, Constr. Build. Mater., vol. 10, no. 3, pp. 179–184.

      [12] Mertens G, Snellings R, Van Balen K, Bicer-Simsir B, Verlooy P, & Elsen J (2009), Pozzolanic reactions of common natural zeolites with lime and parameters affecting their reactivity, Cem. Concr. Res., vol. 39, no. 3, pp. 233–240.

      [13] Villar-Cocina E, Morales EV, Santos SF, Savastano H, and Frias M (2011), Pozzolanic behavior of bamboo leaf ash: Characterization and determination of the kinetic parameters, Cem. Concr. Compos., vol. 33, no. 1, pp. 68–73.

      [14] Alyamac KE, Ghafari E & Ince R (2017), Development of eco-efficient self-compacting concrete with waste marble powder using the response surface method, J. Clean. Prod., vol. 144, pp. 192–202.

      [15] Myers RH, Montgomery DC & Anderson-Cook CM (2016), Response Surface Methodology: Process and Product Optimization Using Designed Experiments, 4th edition, John Wiley & Sons, New Jersey, pp.325-357.

      [16] ASTM (2015), ASTM C618-15 Standard specification for coal fly ash and raw or calcined natural pozzolan for use in concrete, ASTM International, West Conshohocken, PA.

      [17] Ugheoke IB & Mamat O (2012), A critical assessment and new research directions of rice husk silica processing methods and properties, Maejo Int. J. Sci. Technol., vol. 6, no. 3, pp. 430–448.

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  • How to Cite

    Saad, S. A., Shafiq, N., Ali, M., & Osman, M. M. (2018). Analysis by Means of Surface Response to Chemical Composition and Pozzolanic Reactivity of Ultrafine Treated Rice Husk Ash (UFTRHA) as Cementing Additive Material. International Journal of Engineering & Technology, 7(4.35), 342-346.