×
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

water treatment related question-about HDPE pipe

water treatment related question-about HDPE pipe

water treatment related question-about HDPE pipe

(OP)
I have got two questions
1.How do we connect HDPE(high density poly-ethylene)pipe to brick masonry inspection chambers having masonry thickness 8.5" or 210mm-the joint should be leak-proof
2.An ordinary connection with out flange-joints filled with cement mortar(1:2 ratio) and also concreted (1:1.5:3) was found to have leak.How to rectify this problem?.

RE: water treatment related question-about HDPE pipe

Dear Marokki

I have used a HDPE liner which is cast into the inside surface of the manhole. This enables you to weld the incoming pipe, to the liner, while still retaining the structural attributes of the manhole. A bit more costly but waste liquid manholes are things you do not want to have trouble with.

Another plan is to use a large diameter HDPE pipe as a manhole. In this way welding again becomes easy and the chemical integrity of the mahole is excellent

regards

Chris Wiid

South Africa

RE: water treatment related question-about HDPE pipe

You can probably get an acceptable seal by using an expansive hydraulic cement (various products sold as "crack filler", "patching cement" or "anchoring grout") instead of the ordinary cement mortar and concrete that you've already tried.  These cements/grouts typically have only fine silica aggregate and are highly plastic, so they're not easily used for filling large voids in a single application.  However, they set quickly (in minutes) and successive applications to build up material thickness can be done right away.  "Waterplug", made by the Thoroseal Corporation, is one of the better-known hydraulic cements that's typically used to plug water leaks in cracks and tie-bar holes in concrete foundation walls.  It will probably work as well for your application.   

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