Abstract：Cement stabilization is one of the most widely used soft ground improvement methods, with Portland cement being the most commonly employed binder. However, there are significant environmental impacts associated with the production of PC in terms of high energy and no-renewable resources consumption as well as CO2 emissions. In order to mitigate this effect, the incorporation of industrial by-products in partial or full cement replacement as soft soil stabilization has been encouraged. The production process, chemical properties, application and soft soil stabilization mechanism of an industry by-product/waste-ground granulated blastfurnace slag (GGBS) are introduced. The utilization of GGBS in stahilization of soft soils stabilization can reduce the significant environmental impacts associated with Portland cement production and increase the soft soil stabilizing efficiency and reduce the engineering cost.
易耀林, 卿学文, 庄焱, 刘松玉, 杜广印. 粒化高炉矿渣微粉在软土固化中的应用及其加固机理[J]. 岩土工程学报, 2013, 35(zk2): 829-833.
YI Yao-lin, QING Xue-wen, ZHUANG Yan, LIU Song-yu, DU Guang-yin. Utilization of GGBS in stabilization of soft soils and its mechanism. Chinese J. Geot. Eng., 2013, 35(zk2): 829-833.
[1] CDIT. The deep mixing method: principle, design and construction [M]. Tokyo: A A Balkema Publishers, 2002. [2] HEWLETT P C. Lea's chemistry of cement and concrete (4th edition) [M]. Oxford: Elsevier, 1998. [3] HIGGINS D D. GGBS and sustainability[J]. Construction Materials, 2007, 160(3): 99-101. [4] SHI C J, KRIVENKO P V, ROY D. Alkali-activated cements and concretes[M]. London: T aylor & Francis, 2006. [5] HIGGINS D D. Soil stabilisation with ground granulated blastfurnace slag[R]. Surrey: UK Cementitious Slag makers Association report, 2005. [6] HAKKINEN T. The influence of slag content on the microstructure, permeability and mechanical properties of concrete. Part 1: Microstructural studies and basic mechanical properties[J]. Cement and Concrete Research, 1993, 23(2): 407-421. [7] WILD S, KINUTHIA J M, ROBINSON R B, el al. Effects of ground granulated blast furnace slag (GGBS) on the strength and swelling properties of lime-stabilized kaolinite in the presence of sulphates[J]. Clay Minerals, 1996, 31(3): 423-433. [8] WILD S, KINUTHIA J M, JONES G I, et al. Effects of partial substitution of lime with ground granulated blast furnace slag (GGBS) on the strength properties of lime stabilised sulphate-bearing clay soils[J]. Engineering Geology, 1998, 51(1): 37-53. [9] WILD S, KINUTHIA J M, JONES G I, et al. Suppression of swelling associated with ettringite formation in lime stabilized sulphate bearing clay soils by partial substitution of lime with granulated blastfurnace slag[J]. Engineering Geology, 1999, 51(4): 257-277. [10] TASONG W A, WILD S, TILLEY R J D. Mechanism by which ground granulated blastfurnace slag prevents sulphate attack of lime-stabilised kaolinite[J]. Cement and Concrete Research, 1999, 29(7): 975-982. [11] JAMES R, KAMRUZZAMAN A H M, HAQUEAND A, et al. Behaviour of lime-slag-treated clay[J]. Ground Improvement, 2008, 161(4): 207-216. [12] OBUZOR G N, KINUTHIA J M, ROBINSON R B. Enhancing the durability of flooded low-capacity soils by utilizing lime-activated ground granulated blastfurnace slag (GGBS)[J]. Engineering Geology, 2011, 123(3): 179-186. [13] NIDZAM R M, KINUTHIA J M. Sustainable soil stabilisation with blastfurnace slag-a review[J]. Construction Materials, 2010, 163(3): 157-165. [14] OBUZOR G N, KINUTHIA J M, ROBINSON R B. Utilisation of lime activated GGBS to reduce the deleterious effect of flooding on stabilised road structural materials: A laboratory simulation[J]. Engineering Geology, 2011, 122(3): 334-338. [15] YI Y L, LISKA M, AL-TABBAA A. Initial investigation into the use of GGBS-MgO in soil stabilisation[C]// Proceedings of the 4th International Conference on Grouting and Deep Mixing. New Orleans: ASCE, 2012. [16] 易耀林. 基于可持续发展的搅拌桩系列新技术与理论[D]. 南京: 东南大学, 2013. (YI Yao-lin. Sustainable deep mixing methods and theory[D]. Nanjing: Southeast University, 2013. (in Chinese)) [17] OUF M E. Stabilisation of clay sub-grade soils using ground granulated blastfurnace slag[D]. Leeds: University of Leeds, 2001. [18] TAYLOR H F W. Cement chemistry[M]. London: Academic Press, 1990. [19] WU X, JIANG W, ROY D M. Early activation and properties of slag cement[J]. Cement and Concrete Research, 1990, 20(6): 961-974. [20] SONG S, SOHN D, JENNINGS H M, et al. Hydration of alkali-activated ground granulated blastfurnace slag[J]. Journal of Materials Science, 2000, 35(1): 249-257. [21] BEN HAHA M, LOTHENBACH B, LE SAOUT G, et al. Influence of slagchemistry on the hydration of alkali-activatedblast-furnaceslag. Part I: Effect of MgO[J]. Cement and Concrete Research, 2011, 41(9): 955-963. [22] OTI J E, KINUTHIA J M, BAI J. Compressive strength and microstructural analysis of unfired clay masonry bricks[J]. Engineering Geology, 2009, 109(3): 230-240.
