›› 2010, Vol. 31 ›› Issue (1): 113-117.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effect of mineral component of soil on strength increasing of stabilized soil

NING Jian-guo1，HUANG Xin2   

  1. 1. Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science & Technology, Qingdao 266510, China; 2. Department of Civil Engineering, Beihang University, Beijing 100083, China
  • Received:2008-05-26 Online:2010-01-10 Published:2010-02-02

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Abstract:

At same cement content there existed obviously strength difference between the stabilized soil samples formated from soil samples with different mineral components, which was adjusted manually. In order to find the reason of these experimental results, concentrations of main ions in the pore solutions squeezed from the stabilized soil samples were measured; and the concentrations of Ca(OH)2 in the pore solutions with many ions were calculated by the thermodynamic method. The result shows that ,at same cement content，when the mineral component of soil samples is montmorillonite, the concentration of Ca(OH)2 in the pore liquid of the stabilized soil can not reach to saturation; at this stage, the lower the content of montmorillonite is, the more the hydrates generated by cement hydration; therefore the higher the strength of the stabilized soil is; after the concentration of Ca(OH)2 reach saturation point, the hydrates will fully grow and the strength of the stabilized soil will reach maximum. On the basis of this, the concentration of Ca(OH)2 in the pore liquid of the stabilized soil was adjusted through alkaline matter; The result shows that alkaline matter can increase the concentration of Ca(OH)2 in the pore liquid, heighten the strength of the stabilized soil samples.

Key words: stabilized soil, mineral component, pore solution, Ca(OH)2 concentration, additive agent

CLC Number: 

  • TU 447
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