Reuse existing base and subbase course
Reuse existing base and subbase course
(OP)
We have a site with an existing parking lot. New construction will be done and we will have the new parking lot in the same area of the existing one. The existing parking lot was installed about 30 years ago. As result of the new grading, we will need to cut and fill in the area of the parking lot. I took samples of the base course and it’s properties are fine so I am planning to keep it in place and cut and fill new base as required (by the way, we are doing the pavement design). My first concern was about if the existing base and subbase are properly compacted. However, the existing parking lot does not show evidence of pavement failure so I am assuming that the base and subbase courses were properly compacted.
Do you have any input or any comments about this approach? Do you think that it will be better to remove the entire existing base and subbase and replace them with new material? Perhaps, some sand cone tests to validate the compaction may be needed? Any feedback will be appreciated. Thanks!
Do you have any input or any comments about this approach? Do you think that it will be better to remove the entire existing base and subbase and replace them with new material? Perhaps, some sand cone tests to validate the compaction may be needed? Any feedback will be appreciated. Thanks!





RE: Reuse existing base and subbase course
If the base material is sufficiently competent, scarify, supplement and recompact.
RE: Reuse existing base and subbase course
RE: Reuse existing base and subbase course
RE: Reuse existing base and subbase course
RE: Reuse existing base and subbase course
We are thinking in this approach: for fill areas, I think that we can just scarify, recompact and supplement. For cut areas, to keep it simple, remove the entire existing base and replace it with new base/subabse. The removed base can be reused as new base as long as it is not contaminated with the subgrade soils.