×
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

concrete water tank

concrete water tank

concrete water tank

(OP)
can anyone tell about QC requirements for underground concrete water tank?  design, material strength test, leak test etc

RE: concrete water tank

Can you provide the intended use and volume for the tank?

RE: concrete water tank

(OP)
thanks bimr...
intended to use as oily water tank mainly to collect rain water from plant equipment.

SBlowers

RE: concrete water tank

(OP)
sorry forgot to mention the volume, 10000L

RE: concrete water tank

Will the tank be built to any particular code requirements?  Since it is oily water and the volume is 10000 liters, you have to make sure it doesn't leak petroleum product into the ground or groundwater.

QA would be the same as any concrete structural system.  Control the concrete, control the rebar placement, control the dimensions, make sure the waterproofing/leakproofing are intact, etc.

Concrete strength will depend on the design.  Test the concrete for compliance. Do a leak test when the tank is built....not sure what your acceptance criteria will be, but you might check leak criteria under API code.

RE: concrete water tank

Concrete tanks are built to the design standards set by the American Concrete Institute.

http://www.concrete.org/tkc/knowledge_center.htm

The leak test procedures used for concrete tanks is not as simple and precise as the one used for steel tanks. It is difficult to prove a concrete tank is water tight.

RE: concrete water tank

Concrete is water resistant, (permeable), unless cast with additives or a water proof liner such as fiberglass.

RE: concrete water tank

since it is difficult to test for watertightness which should be done after installation and backfill, most tanks are designed and constructed with conservative measures to promote "water tightness" such as:

high strength, dense concrete
thick walls
additional steel reinforcement
additional cover over reinforcement
water stops
good curing
good subgrade compaction
good backfill

these are the things that will need to be QC'd to provide a tank that is reasonably assured of "leak proof" service

this is a relatively small tank and should be pre-cast. Ask your pre-caster for the typical specifications and process.

RE: concrete water tank

concrete is a darker color when it gets wet. fill the vault full of water and look all around the outside for any discoloration. this is how the inspectors check to see if our vaults leak. i know this because i work for a precaster and this is how it is done.

IAPMO (intl. assoc. of plumbing & mechanical officials) has design requirements regarding strength, rebar clearances, etc.

go to oldcastleprecast.com and click on a location near you.  We sell CPS (coalescant plate seperators which are IAPMO listed. for 10,000 L capacity you would need a 612-2 CPS vault.  Our vaults are guaranteed not to leak or we repair it free of charge.

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