›› 2007, Vol. 28 ›› Issue (9): 1987-1991.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Mechanical behavior and mechanism of stabilizing soft soil by slag cementitious material

ZHANG Da-jie1, TIAN Xiao-feng1, HOU Hao-bo1, LIU Hao2, TAN Shi-kang3   

  1. 1. School of Resources and Environmental Science, Wuhan University, Wuhan 430079,China; 2. Hubei Provincial Communications Planning and Design Institute, Wuhan 430020,China; 3. Hubei Suiyue Expressway Headquarters, Tianmen 441300,China
  • Received:2005-12-30 Online:2007-09-10 Published:2013-10-15

Abstract: soft soil is stabilized by slag cementitious materials, which can not only reuse industrial wastes, but also reduce amount of cement. Sandy soil and clay soil are stabilized by slag cementitious materials. Result shows that the stabilization effect of alkali-slag cementitious materials is better than cement and lime. The unconfined compressive strength of soils added 9 % slag cementitious materials after curing 28 days reaches 2.0 MPa, which are higher than soils added 15 % cement; softening coefficient of stabilized soils after curing 28 days are almost higher than 90 %; the CBR of stabilized clay soil outclasses that of the lime-clay soil with the same mixing ratio. XRD analysis shows that the high-strength, insoluble mineral produced due to hydration of slag cementitous materials is the main cause for better effect of soil. All those show that alkali-slag cementitious material is an ideal solidifying agent for soil stabilization.

Key words: slag cementitious materials, stabilization, soft soil, unconfined compressive strength, water stability, CBR

CLC Number: 

  • TU 411
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