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SHA Ai-min, JIA Kan, LI Xiao-gang. Fatigue performances of semi-rigid base course materials[J]. Journal of Traffic and Transportation Engineering, 2009, 9(3): 29-33. doi: 10.19818/j.cnki.1671-1637.2009.03.005
Citation: SHA Ai-min, JIA Kan, LI Xiao-gang. Fatigue performances of semi-rigid base course materials[J]. Journal of Traffic and Transportation Engineering, 2009, 9(3): 29-33. doi: 10.19818/j.cnki.1671-1637.2009.03.005
shu

Fatigue performances of semi-rigid base course materials

doi: 10.19818/j.cnki.1671-1637.2009.03.005
  • 1.

    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Xi'an Highway Research Institute, Xi'an 710054, Shaanxi, China

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  • Author Bio:

    SHA Ai-min(1964-), male, professor, PhD, +86-29-82334428, aiminsha@263.net

  • Received Date: 2009-01-21
  • Publish Date: 2009-06-25
    Abstract
  • Four kinds of beam specimens with different structural types for four semi-rigid base materials were made by using vibration compaction method.The fatigue performance test of semi-rigid base materials was carried out by utilizing material test system(MTS).The results of the test were recursively analyzed by using Weibull's probability distribution function.A series of fatigue prediction models were set up.The effects of the structural types and flexural strengthes of semi-rigid base materials on their fatigue lives were studied.Analysis result shows that the recursive coefficients a and b of the models for the materials are different.The models of cement stabilized base course materials are tiny difference except framework-pore structure, and the scopes of a and b are respectively 0.969~1.110 and-0.073~-0.096.The scopes of a and b of lime-fly ash stabilized base course materials are respectively 1.129~1.173 and-0.079~-0.083.The logarithmic fatigue lives of framework-dense structure and suspend-dense structure are respectively 3.602 and 3.118 at 0.70 stress level, so the fatigue performance of the former is better than that of the latter.The logarithmic fatigue life of lime-fly ash stabilized macadam is 5.006 at 0.70 stress level, but the maximum value of cement stabilized base course material is 3.724, so the fatigue performance of the former is better than that of the latter.8 tabs, 11 refs.

     

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