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r-values 1

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rock0977

rock0977

Civil/Environmental
Joined
Feb 24, 2005
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1
Location
US
i have a Question-
Can r-values the (test done on some soil samples to determine what the thickness for the sub-grade and the asphalt thickness needed when designing new roads)variey from 40 to 68 within 200 ft distance?
thank you
 
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The R-Value (Hveem-Carmany Test) varies with soil types. If the soil has changed in 200 feet, then the R-Value has most likely changed. From the values you have given, it is possible the change has been from a sand to a gravelly sand. A change in the gradation or the plasticity of the fines can result in significant changes.
 
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