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ZHANG Zhi-quan, HU Zhi-ping, ZHAO Jie. Strength properties of lime-fly ash loess under freezing-thawing cycles[J]. Journal of Traffic and Transportation Engineering, 2011, 11(6): 24-30. doi: 10.19818/j.cnki.1671-1637.2011.06.004
Citation: ZHANG Zhi-quan, HU Zhi-ping, ZHAO Jie. Strength properties of lime-fly ash loess under freezing-thawing cycles[J]. Journal of Traffic and Transportation Engineering, 2011, 11(6): 24-30. doi: 10.19818/j.cnki.1671-1637.2011.06.004
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Strength properties of lime-fly ash loess under freezing-thawing cycles

doi: 10.19818/j.cnki.1671-1637.2011.06.004
  • 1.

    School of Civil Engineering, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Shaanxi Provincial Expressway Construction Group Co., Xi'an 710054, Shaanxi, China

More Information
  • Author Bio:

    ZHANG Zhi-quan (1973-), male, senior engineer, +86-29-82337233, zzqca@163.com

  • Received Date: 2011-07-19
  • Publish Date: 2011-12-25
    Abstract
  • For lime-fly ash loess, the water-saturated strength test, the strength test at different ages under 6 freezing-thawing cycles and the strength increasing test after 1 freezing-thawing cycle were carried out, and the strength properties were analyzed.Analysis result shows that the strength of lime-fly ash loess grows slowly with age, and the water-saturated strength of long age lime-fly ash loess only reduces by 2.4%.The strength of early age lime-fly ash loess after 1 to 6 freezing-thawing cycles decreases by 19.0% evenly.The strength of long age lime-fly ash loess after 6 freezing-thawing cycles is essentially same, and only decreases by 2.4%.The water-saturated strength of early age lime-fly ash loess decreases by 47.9% evenly after 6 freezing-thawing cycles, and the strength average decreases by 41.9% after 4 freezing-thawing cycles.The water-saturated strength of long age lime-fly ash loess decreases by 14.6% evenly after 6 freezing-thawing cycles, and the strength average decreases by 7.5% after 4 freezing-thawing cycles.When the lime-fly ash loesses with 3, 7, 14, 28 d ages under 1 freezing-thawing cycle are conserved to 90 d, the long age strength average decreases by 4.0%.Therefore, the long age lime-fly ash loess has completed 60% of strength increase, and has better water stability and freezing-thawing stability.

     

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