California Bearing Ratio (CBR) is tested toa)Measure of soil strength...
The California bearing ratio test is a penetration test meant to evaluate subgrade strength of roads and pavements. The results obtained by these tests are used with the empirical curves to determine the thickness of pavement and its component layers. This is the most widely used method for the design of flexible pavement.
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California Bearing Ratio (CBR) is tested toa)Measure of soil strength...
California Bearing Ratio (CBR) is a measure to indicate the relative strength of paving materials. It is an important parameter in the field of highway engineering and is used in the design of flexible pavements. The CBR test measures the resistance of a soil to penetration by a standard piston, and the ratio of the force required to penetrate the soil to the force required to penetrate a standard material at the same depth and under the same conditions.
Below are the points explaining the answer in detail:
• California Bearing Ratio (CBR) is a measure of the strength of paving materials used in the construction of flexible pavements.
• The CBR test measures the relative strength of a soil, which is an important parameter in the design of flexible pavements.
• The test is conducted by penetrating a soil sample with a standard piston and measuring the force required to penetrate it.
• The CBR value of a soil is expressed as a percentage of the force required to penetrate the soil to that required to penetrate a standard material at the same depth and under the same conditions.
• The CBR test is widely used in the field of highway engineering to determine the strength of soil and to design flexible pavements.
• The CBR value is used to select the thickness of the pavement layers and the type of pavement material to be used.
• The higher the CBR value, the stronger the soil and the more suitable it is for use in the construction of flexible pavements.
Therefore, the correct answer is option D, i.e., CBR is a measure to indicate the relative strength of paving materials.