›› 2015, Vol. 36 ›› Issue (S1): 362-366.doi: 10.16285/j.rsm.2015.S1.062

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A durability experimental study of lightweight soil subjected to wetting-drying cycles and sodium sulfate soaking

LIU Kai1, 2, LI Ren-min1, 2, DU Yan-jun1, 2, WEI Min-li1, 2   

  1. 1. Institute of Geotechnical Engineering, Southeast University, Nanjing, Jiangsu 210096, China; 2. Jiangsu Key Laboratory of Urban Underground Engineering & Environmental Safety, Southeast University, Nanjing, Jiangsu 210096, China
  • Received:2015-03-10 Online:2015-07-11 Published:2018-06-14

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Abstract: In this study, cement and geopolymer are added to lightweight soil as binders. For the purpose of comparison, unconfined compressive strength test is conducted to evaluate the effects of wetting-drying cycles and sodium sulfate soaking on the strength properties of lightweight cement stabilized clay(LCSC) and lightweight geopolymer stabilized clays(LGSC). The change of unconfined compressive strength and mass loss with wetting-drying cycles and sodium sulfate soaking are discussed. The results show that the values of unconfined compressive strength of LGSC are 2 times that of LCSC under the standard curing condition. Upon wetting-drying cycles, the unconfined compressive strength of LGSC decreases more rapidly than that of LCSC. Compared with LCSC, the wetting-drying durability of LGSC is weaker. After sulfate solution soaking for 120 days, unconfined compressive strength of LGSC declines slightly. However the surface of LCSC cracks. Compared with LCSC, the wetting-drying durability of LGSC is stronger.

Key words: lightweight soil, cement, geopolymer, wetting-drying cycles, sodium sulfate soaking, durability

CLC Number: 

  • TU 443
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