What do you consider a "pass" when compacting soil

[BigH]

This might have been discussed before - somewhere on the site . . . but a point has come up as to what defines a pass of the roller. It has always been my view that each time a "spot" is passed by the roller, it is a single pass. A round trip is two passes.

Please give your thoughts - and I'd appreciate any references. I see that VDOT considers a pass as I do. Yet, in Malaysia, they considered a pass to be a round trip.

Cheers!

 

[Ron]

I consider a pass to be the same as you...one time over the spot.

 

[EireChch]

Yes I agree too. I find it hard to believe that people think differently in this context.

In saying that, when we had to do sprints, up and down was always just 1. But I suppose we're talking about passing which means when something passes a point (to me anyways)so once on the way up and twice on the way down.

 

[jdonville]

Yup.

 

[GeoPaveTraffic]

Agree, a round trip is two passes.

Mike Lambert

 

[oldestguy]

I pass

 

[Ron]

@OG..

 

[BigH]

Good one Cliff!!

 

[Panars]

In earthwork, one pass is generally one trip of a roller over a given location.
In asphalt compaction, one pass is over and back, or two trips of a roller over a given location.
This is probably where the confusion comes from. I always made a point of explaining the difference when I was training ODOT construction inspectors.

 

[jdonville]

Do you know what the origin of the "double" pass standard for asphalt is, as it seems non-intuitive?

 

[fattdad]

I'm in Virginia!

f-d

ípapß gordo ainÆt no madre flaca!

 

[geotechguy1]

Each time a spot is passed I consider that a single pass