×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

asphalt cracking
6

asphalt cracking

asphalt cracking

(OP)
All respected friends

A newly laid asphalted road has cracked longitudinally upto 10 m apprx so far. ( see attached photos)

There is no concavity observed

The road is inside an industrial facility with occasional medium sized trucks.

The subbase/ base / asphalt is about 10 months old.

Anyone has idea of the longitudinal asphalt crack?

Thanks

RE: asphalt cracking

2
Seeing this is a side hill situation, I tend to believe the site grading for that road was not up to the usual highway requirements. Also, it may be that this crack is the junction between cut on the left and fill on the right. The fill may be slipping down hill. It may be due to the natural ground below or the fill itself as low shear strength. More info on the area, the weather conditions and specifications will help. As of now I suspect sub-standard earthwork.

RE: asphalt cracking

is there a storm drain pipe running underneath that crack...

RE: asphalt cracking

(OP)
CVG

Yes
There is a stormwater pipeline running adjacent and you can see a pit in the picture (along the kerb line. This work was aslo carried out by the same contractor

Thanks

RE: asphalt cracking

(OP)
oldestguy
Very valuable information

Thanks a lot. Your analysis appears to be very close to what has happened

RE: asphalt cracking

My eyes differ slightly from OG's - straining to look at your photo, it appears the entire road prism has been cut- that seems to be a shotcrete retaining wall or similar structure on the right hand side.

If so, and noting the grassed infiltration strips on either side of the roadway, I'm going with water ingress...was subsoil drainage installed alongside your road?

All the best,
Mike

RE: asphalt cracking

The main thing that I can relate this to, besides cut and fill situation is filling for a road over a deposit of sedimentary prat. In those cases the road fill splits and each side goes "its way", leaving a crack down the center.

RE: asphalt cracking

I would lay dollars to donuts that the storm drain trench is settling, the pipe is leaking or both.

RE: asphalt cracking

My bet is a poor job of placing and compacting (if at all) of the fill. Storm drain is likely near or under the curb line. There is no sign of settling that I can see. The green thing at the inlet might be a local settling however.

RE: asphalt cracking

I'm going with an inadequate clayey subgrade that is saturated from water infiltrating the grass strip on left of the photo, probably compounded by poor asphalt - let us know the outcome, seeing as bets have now been placed!

Mike

RE: asphalt cracking

Lots of excellent possibilities here.

Personally, I thinks it’s alligators.

Mike McCann, PE, SE (WA, HI)


RE: asphalt cracking

(OP)
CVG
This possibility was considered very seriously. Thorough inspections has not revealed any trace of settlement of the drain pipe/ trench


Thank you

RE: asphalt cracking

(OP)
oldestguy
No settlement of the drain pipe / trench

The green thing is just paint over some wrong signage that will be corrected soon

RE: asphalt cracking

(OP)
msquared48
The owner has brought his on geotech / asphalt specialist
The contractor is also seeking outside opinion

Will wait and watch and keep posting

RE: asphalt cracking

(OP)

Thanks to all for excellent responses

RE: asphalt cracking

One thing we (I) missed is a cross section view of this road and the nearby ground up and down hill. Perhaps your specialists will make one up as part of the check.

RE: asphalt cracking

3
Have you considered that your roadway may be sitting directly between divergent tectonic plates and the only thing preventing an earthquake is your excellently placed asphalt?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close