×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Crushed stone size limitation for non-expansive frostfree fill

Crushed stone size limitation for non-expansive frostfree fill

Crushed stone size limitation for non-expansive frostfree fill

(OP)
Hi, Guys, Need help here.

I remember there was a thread before, which discusses about the crushed stone size for use as non-expansive frostfree fill. But I can not find this thread now. Can anybody direct me to that thread or tell me what is the max./min. crushed stone size for non-expansive frostfree fill?

Thank you very much.  

RE: Crushed stone size limitation for non-expansive frostfree fill

If you are referring to non-frost susceptible (NFS) material, the definition is a soil that contains no more than 3% by weight finer than 0.02 mm. A #200 sieve is generally used (0.074 mm), for which the requirement is no more than 5% passing. Whether crushed or not isn't a factor.

No upper size limit, but 3" is a typical upper limit for practical compaction purposes.
For non-expansive, I expect the limit on fines achieves this purpose, but may need to exclude certain sources or mineral types if this is a possibility.

RE: Crushed stone size limitation for non-expansive frostfree fill

(OP)
CarlB, Thank you very much.

Yes I vaguely remember in a thread talking about 3" (or 5") maximum crushed stone diameter. So it is probably 3" is what I have seen.

RE: Crushed stone size limitation for non-expansive frostfree fill

There was also some work done by the TRL in the UK where they produced a graph of the grading of materials, and indicated a zone where it suggested' that the soil in this zone' WOULD be suceptible to frost heave. I have attached below the data suggested by the TRL (Soil Mechanics for Road Engineers) dates back to the 1970's but is still a useful good reference.
BS Sieve Size [mm]    Upper Limit    Lower Limit
150    100    100
125    100    100
90    100    100
75    100    100
37.5    100    100
10    100    100
5    100    100
2.36    100    100
1.00    88    100
0.600    77    100
0.212    58    100
0.100    40    93
0.063    32    85
0.010    14    55
0.002    5    24
 

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!


Resources