Study on Performance of Alkali-Activated Flyash-Based Geopolymer Reinforced by Silica Fume and Styrene-Acrylic Emulsion

Abstract:

In order to improve the inherent fragility of alkali-activated fly ash-based geopolymer, the silica fume and styrene-acrylic emulsion were used to reinforce and toughen the geopolymer. The phase structure, morphology and chemical composition were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray fluorescence (XRF). The results showed that the mechanical properties of alkali-activated fly ash-based geopolymer were dramaticlly improved and the specimen with doping content of 10 wt% silica fume, 1wt% styrene-acrylic emulsion and 15wt% the alkaline excitation agent Na2SiO39H2O showed the highest compressive and flexural strengths of 42.11MPa and 5.30MPa in the ambient temperature curing 28d, respectively. SEM results indicated that doped silica fume and styrene-acrylic emulsion were embedded within the matrix of fly ash-based geopolymer. XRD results demonstrated that the mineral structures did not change obviously when silica fume and styrene-acrylic emulsion were added to the geopolymer

• Periodical: Advanced Materials Research (Volumes 374-377)
• Pages: 1632-1636
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.374-377.1632
• Online since: October 2011
• Authors: Ya Chao Wang, Yao Jun Zhang, Yong Xu, De Long Xu
• Keywords: Alkali Activation, Fly Ash (FA), Styrene-Acrylic Emulsion, Toughening

References

[1] H.Xu, J.S.J. Van DeÍenterr. J. Miner. Process. 59: 247–266.(2000)

[2] P.T. Fernando C.G. Joao,J.Said. Construction and Building Materials.22:1305-1314.(2008)

[3] C. Fernandez Pereira et al. Fuel 88:1185–1193.(2009)

[4] Y.S. Zhang,W.Sun , Z.J.Li et al. Construction and Building Materials.22:370-383.(2008)

[5] P.J Sun, H.C.Wu: Cement & Concrete Composites. 30:29-36.(2008)

[6] P.V. Krivenko,D.Roy:Aikali-activated Cement and Concrete[M] (Chemical Industry Press, Bejing, 2008)pp.202-203.

[7] F.J. Palomo, M. Criado: Cement and Concrete Research .35: 1204-1209.(2005)

[8] R.R Lloyd,Ph.[D].(Thesis,University of Melbourne,Australia,2008).

[9] E.Prud'homme,P.Michaud, E.Joussein,et al.Journal of the European Ceramic Society. 30:1641-1648.(2010)

[10] A.Hajimohammadi J.L. Provis J.S.J. Deventer.Cement and ConcreteResearch. 41:210-216.(2011)

[11] Y.J. Zhang Y.C. Wang, D.L.Xu, S.Li:Materials Science and Engineering A 527:6574-6580.(2010)

[12] Y.J. Zhang, S.Li, D. L.Xu et al: J Mater Sci.45:1189-1192. (2010)