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Stabilization of Marine Soft Clay with Two Industry By-products

Conference paper

Abstract

Stabilization using Portland cement (PC) is one of the most widely used soft clay treatment methods. However, there are significant environmental impacts associated with the production of PC in terms of high energy consumption and non-renewable resources, as well as CO2 emissions. Some industry by-products/wastes have potentials to be applied in soil stabilization. This paper presents an experimental study on the stabilization of a marine soft clay using the blend of two industry by-products: ground granulated blastfurnace slag (GGBS) activated by carbide slag (CS). The testing program involved unconfined compressive strength test, X-ray diffraction, and scanning electron microscopy. The results indicated that both CS-GGBS-stabilized and PC-stabilized clays had similar types of hydration products, including calcium silicate hydrates, calcium aluminates, hydrocalumite, and ettringite. However, the highest strength of CS-GGBS-stabilized clay was 1.5–3 times greater than that measured for PC-stabilized clay. The optimum CS/GGBS mass ratio varied from 0.2 to 0.3 for stabilized clay at different curing age and GGBS content.

Keywords

Marine soft clay Stabilization Industry by-products 

Notes

Acknowledgments

The authors would like to thank Liyang Gu, Pengfei Guo, Zhao Wang, and Sheng Chang for their assistance in laboratory. The financial support from Singapore MOE AcRF Tier 1 grant (RG184/17) is appreciated.

References

  1. 1.
    Kitazume, M., Terashi, M.: The Deep Mixing Method. CRC Press/Balkema, Leiden (2013)Google Scholar
  2. 2.
    Higgins, D.D.: GGBS and sustainability. Constr. Mater. 160(3), 99–101 (2007)CrossRefGoogle Scholar
  3. 3.
    Jegandan, S., Liska, M., Osman, A.A.M., Al-Tabbaa, A.: Sustainable binders for soil stabilisation. Proc. ICE Ground Improv. 163(1), 53–61 (2010)CrossRefGoogle Scholar
  4. 4.
    Nidzam, R.M., Kinuthia, J.M.: Sustainable soil stabilisation with blastfurnace slag - a review. Proc. ICE Constr. Mater. 163(3), 157–165 (2010)CrossRefGoogle Scholar
  5. 5.
    Tasong, W.A., Wild, S., Tilley, R.J.D.: Mechanisms by which ground granulated blastfurnace slag prevents sulphate attack of lime-stabilised kaolinite. Cem. Concr. Res. 29(7), 975–982 (1999)CrossRefGoogle Scholar
  6. 6.
    Wild, S., Kinuthia, J.M., Jones, G.I., Higgins, D.D.: Suppression of swelling associated with ettringite formation in lime stabilized sulphate bearing clay soils by partial substitution of lime with ground granulated blastfurnace slag. Eng. Geol. 51(4), 257–277 (1999)CrossRefGoogle Scholar
  7. 7.
    James, R., Kamruzzaman, A.H.M., Haqueand, A., Wilkinson, A.: Behaviour of lime-slag-treated clay. Proc. ICE Ground Improv. 161(4), 207–216 (2008)CrossRefGoogle Scholar
  8. 8.
    Yi, Y., Gu, L., Liu, S.: Microstructural and mechanical properties of marine soft clay stabilized by lime-activated ground granulated blastfurnace slag. Appl. Clay Sci. 103, 71–76 (2015)CrossRefGoogle Scholar
  9. 9.
    Cardoso, F.A., Fernandes, H.C., Pileggi, R.G., Cincotto, M.A., John, V.M.: Carbide lime and industrial hydrated lime characterization. Powder Technol. 195(2), 143–149 (2009)CrossRefGoogle Scholar
  10. 10.
    Davis, S., Funada, C.: Calcium carbide. SRI Consulting, Calif (2011)Google Scholar
  11. 11.
    Li, Y., Sun, R., Liu, C., Liu, H., Lu, C.: CO2 capture by carbide slag from chlor-alkali plant in calcination/carbonation cycles. Int. J. Greenhouse Gas Control 9, 117–123 (2012)CrossRefGoogle Scholar
  12. 12.
    Yi, Y., Gu, L., Liu, S., Puppala, A.J.: Carbide slag-activated ground granulated blastfurnace slag for soft clay stabilization. Can. Geotech. J. 52(5), 656–663 (2015)CrossRefGoogle Scholar
  13. 13.
    Matschei, T., Lothenbach, B., Glasser, F.P.: The AFm phase in Portland cement. Cem. Concr. Res. 37(2), 118–130 (2007)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.School of Civil and Environmental EngineeringNanyang Technological UniversitySingaporeSingapore

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