## CBR value for base-course in roadworks

## CBR value for base-course in roadworks

(OP)

I would like to find out if an unsoaked CBR value can exceed 100% for a base-course material: maximum size aggregate 37.5mmm and having a continuous grading curve, sourced from a borrow pit.

Technical specifications impose a value of minimum 80% for base-course.

Thanks for your help.

Technical specifications impose a value of minimum 80% for base-course.

Thanks for your help.

## RE: CBR value for base-course in roadworks

## RE: CBR value for base-course in roadworks

dirtman85....I disagree that only cohesive materials need to be soaked. Stability is greatly dependent on the state of saturation relative to the compaction at the time of saturation. A CBR or similar design curve is developed from the soaked condition, whether cohesive or non-cohesive.

## RE: CBR value for base-course in roadworks

## RE: CBR value for base-course in roadworks

## RE: CBR value for base-course in roadworks

## RE: CBR value for base-course in roadworks

"The California Bearing Ratio (CBR) test is a simple strength test that compares the bearing capacity of a material with that of a well-graded crushed stone (thus, a high quality crushed stone material should have a CBR @ 100%)."

ht

## RE: CBR value for base-course in roadworks