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California Bearing Ratio (CBR) value is an important soil parameter in the design of flexible Pavement as it is considered the strength-measuring parameter. Determination of CBR is a very complex and time-consuming. Here, a simplified method based on liquid limit, plastic limit, plasticity index, optimum moisture content, and maximum dry density of the soil is used to estimate the CBR value. Five soil samples were collected from Mirpur, Gazipur, Noakhali, Hatirpool, and Nawabganj to estimate soil properties. Finally, a regression analysis is made by using SPSS 16.0 software based on the Correlation coefficient to predict the unsoaked CBR value, and predicted values are compared with the actual CBR value. The coefficient of determination R varies from 0.86 to 0.99 for CBR with Plastic limit and 0.06–0.2 for MDD. Thus, it can be stated that the unsoaked CBR value has a very good linear relationship with PL and a very poor linear relationship with MDD.

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Relationship Between CBR and Soil Index Properties of Bangladesh Soil Samples

  • 会议论文

  • 发表日期：

    2025年

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  • Kaniz Roksana,
  • Tabassum Islam,
  • Abdul Muqtadir

摘要

California Bearing Ratio (CBR) value is an important soil parameter in the design of flexible Pavement as it is considered the strength-measuring parameter. Determination of CBR is a very complex and time-consuming. Here, a simplified method based on liquid limit, plastic limit, plasticity index, optimum moisture content, and maximum dry density of the soil is used to estimate the CBR value. Five soil samples were collected from Mirpur, Gazipur, Noakhali, Hatirpool, and Nawabganj to estimate soil properties. Finally, a regression analysis is made by using SPSS 16.0 software based on the Correlation coefficient to predict the unsoaked CBR value, and predicted values are compared with the actual CBR value. The coefficient of determination R varies from 0.86 to 0.99 for CBR with Plastic limit and 0.06–0.2 for MDD. Thus, it can be stated that the unsoaked CBR value has a very good linear relationship with PL and a very poor linear relationship with MDD.