›› 2012, Vol. 33 ›› Issue (7): 1940-.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of expansive soil improved with granulated blast furnace slag (GBFS)

SUN Shu-lin1, 2, TANG Jun2, 3, ZHENG Qing-hai2, 4, ZHANG Gan-yu2, ZHOU Li-guo2, 5, SHANG Wen-tao6   

  1. 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China; 2. Department of Earth Science and Engineering , Hohai University, Nanjing 210098,China; 3. Anhui Communications Consulting & Design Institute, Hefei 230088, China; 4.Hydrochina Zhongnan Engineering Corporation, Changsha 410014, China; 5. Anhui Electric Power Design Institute, Hefei 230601, China; 6. Department of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
  • Received:2011-03-28 Online:2012-07-11 Published:2012-07-13

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Abstract: Granulated blast furnace slag (GBFS) is utilized to overcome or to limit the expansion of an expansive soil sample. GBFS is added to sample in proportions of 10%-20% by weight. The test studies of swelling-shrinkage and basic physico-mechanical characteristics of soil samples are taken, so as to determine the improvement effects. Compared with unmodified sample, the free swelling ratio, liquid limit and plastic index decrease obviously; and the particle size gradation, strength characteristics and hydrated properties of the treated expansive soil are improved by a wide range. After improvement, clay content decreases, while silt content increases. The change of dry density with water content decreases and the hydrated property of modified soil is enhanced. It is shown that adding GBFS can successfully improve the expansive soil.

Key words: GBFS, expansive soil, physical properties, swelling-shrinkage characteristics, mechanical characteristics

CLC Number: 

  • TU 411
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