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!
  • Students Click Here

*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


compacting soils in arid climate

compacting soils in arid climate

compacting soils in arid climate


So a friend of mine wants to compact a soil that's composed of decomposed granite in a arid climate in absence of water , we both agreed that the focus should be directed toward using the highest energy possible with the maximum of vibration, but we don't have experience in this matter , so what are the things that we should bare in mind ?

thank you

RE: compacting soils in arid climate

around here it is used for landscaping. decomposed granite can include just about any combination of sand, silt and larger particles and decomposed to various degrees. standards require 70% passing 1/2 inch and no more than 20% passing No. 40. if you use a heavy compactor with vibration, it will break down to a silty sand mixture with probably no cohesion. so heavier is not always better. If you want maximum density, you should use water

Quote (standard spec)

Decomposed granite shall be in accordance with Section 795. The Contractor shall confirm that a sufficient quantity is available so that the entire area will be of the same composition and appearance, and shall furnish a sample to the Engineer for approval as to color. After preliminary grading is completed and the area has been cleared and grubbed, a pre-emergence control, such as Surflan, or equal, shall be applied over the entire area, in accordance with the manufacturer's recommendations. The decomposed granite shall be evenly distributed over the area with a minimum depth of 2 inches. Finish grading will be accomplished and the granite will be lightly watered and then compacted to an extent satisfactory to the Engineer. After compaction, a second treatment with the pre-emergence control will be accomplished.

RE: compacting soils in arid climate

Ok but it seems they will be using it for a major project not sure most probably a road . i adviced him to use water as little as he may get but he insisted that somehow another company using dry compaction in a separate project

RE: compacting soils in arid climate

thank you cvg

RE: compacting soils in arid climate

take the dry soil and compact it in a proctor mold, using the prescribed hammer. You'll get a value. Contrast that to the proctor value and you'll know to some extent what may be realized in the field.

Remold a sample to the expected dry density. Use that remold for your strength and compresibilty. Use those design values.

Not sure what else you can do?


ípapß gordo ainÆt no madre flaca!

RE: compacting soils in arid climate

thank you Fattdad , i have found in a book on google https://books.google.dz/books?id=igeqMqSKkeAC&...
Dry compaction is routinely used in arid climates like Australia , Egypt and Irak it is still feasible except for silty sand or clayey sand , however in situ trial and error must be applied to figure out how and what to do

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


White Paper - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now

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