In project requirements for Item 201, how many CBR tests are needed for a volume of 10,000 cu.m?

For determining the number of California Bearing Ratio (CBR) tests required for a specific volume of material, established guidelines often dictate the frequency and number of tests based on project size and volume. In this case, the volume of 10,000 cubic meters corresponds to project specifications that generally imply a certain number of tests to ensure the reliability and accuracy of the material's bearing capacity assessment.

Typically, guidelines might require a number of tests that can cover variations within the material properties, and this could follow a standard practice where, for a specified volume like 10,000 cubic meters, a range of tests—that is four—might be deemed sufficient to obtain representative data on soil strength characteristics.

The selection of four tests provides a balance between obtaining enough data to analyze variability within the material and preventing excessive testing that would not yield significant additional insight. This reflects an understanding of project requirements and the need for adequate sampling to ensure that the material meets design standards without overtesting. Thus, four is identified as the appropriate number for the volume specified.