Study on the Engineering Characteristic of California Bearing Ratio (CBR) of Expressway Subgrade Material

Guang Qing Yang; Bao Lin Xiong; Bao Jian Zhang

doi:10.4028/www.scientific.net/AMR.250-253.3759

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 250-253Study on the Engineering Characteristic of...

Study on the Engineering Characteristic of California Bearing Ratio (CBR) of Expressway Subgrade Material

Abstract:

The California Bearing Ratio(CBR) denotes the potential strength of subgrade material and is the important index of evaluating its using performance in expressway. In order to study the main influence factors of the CBR value of clay, The physics and chemistry tests of fifteen groups subgrade materials, coming from the Qing(Dao)-Yin(Chuan) expressway in hebei province, are done. Based on the result of tests, which there are obvious difference between CBR value with the same plastic index clay under the same test method and condition, the influence factors of California Bearing Ratio of expressway subgrade materials are distribution of particle sizes in soils, mineral component and clay mineral component. The profitable conclusions are gained: the main influence factors of California Bearing Ratio of expressway subgrade material are the type of mineral component and the content of each mineral, the distribution curve shape of particle sizes in soils and the clay ratio silt secondly. The CBR value minishs with the clay ratio silt increasing.

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Periodical:

Advanced Materials Research (Volumes 250-253)

Pages:

3759-3762

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.250-253.3759

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Online since:

May 2011

Authors:

Guang Qing Yang, Bao Lin Xiong, Bao Jian Zhang

Keywords:

CBR, Clay Ratio Silt, Influence Factor, Mineral Component, Subgrade

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