As I understand asphalt surfacing and resurfacing, some minimal depth of surface milling is required prior to laying and compacting the asphalt in order to meet curb/drain/sewer/road interface junction heights and to produce a surface that increases mechanical adhesion between the old roadway and the applied asphalt. Additionally, bumps/high spots would tend to be better addressed during this surfacing milling than dips/depressions - with dips/depressions, and the underlying pavement/road bed, the more problematic issue.
Since surface milling is required, a companion technology to a 3D paving machine would be a 3D surface milling machine where, with a single/minimal number of passes, (1) dips/depressions/potholes/cracks are milled deeper that the "good" subpavement, and (2) since many dips/depressions/potholes may be inductive of previous asphalt paving where the compaction density of the previous asphalt layment is too low, regions of low/below-standard subpavement density would be milled to a greater depth. Does a 3D milling machine that has the capability of both real-time subpavement height and low-density (and high density over-compacted bumps/ridges) regions evaluation, and adjustment of milling depth, make sense in order to reduce total surface milling and spot milling times/costs? And if so, are you also working on such a surface milling machine?
TooManyInLitter1 karma
Hi John, thanks for doing this AMA.
As I understand asphalt surfacing and resurfacing, some minimal depth of surface milling is required prior to laying and compacting the asphalt in order to meet curb/drain/sewer/road interface junction heights and to produce a surface that increases mechanical adhesion between the old roadway and the applied asphalt. Additionally, bumps/high spots would tend to be better addressed during this surfacing milling than dips/depressions - with dips/depressions, and the underlying pavement/road bed, the more problematic issue.
Since surface milling is required, a companion technology to a 3D paving machine would be a 3D surface milling machine where, with a single/minimal number of passes, (1) dips/depressions/potholes/cracks are milled deeper that the "good" subpavement, and (2) since many dips/depressions/potholes may be inductive of previous asphalt paving where the compaction density of the previous asphalt layment is too low, regions of low/below-standard subpavement density would be milled to a greater depth. Does a 3D milling machine that has the capability of both real-time subpavement height and low-density (and high density over-compacted bumps/ridges) regions evaluation, and adjustment of milling depth, make sense in order to reduce total surface milling and spot milling times/costs? And if so, are you also working on such a surface milling machine?
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