Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Watering Ponding & Segregation of the concrete

  • 02-07-2006 2:15pm
    #1
    godtabh
    Moderators, Science, Health & Environment Moderators Posts: 23,243 Mod ✭✭✭✭


    I recently bought an apartment and went to have a quick look at the progress.

    I was in the car park and saw water ponding in the underground car park.

    I took a picture of it and was just wondering has any one got any thoughts on it.

    Generally in my experience there is usually some sort of water barrier or a way to prevent water from entering the car park.

    The block of flats isn’t finished yet so this water barrier may not be in place so fair enough.

    But water shouldn’t be ponding like this. Water will fall off wet cars and it should move towards the nearest gully or similar.

    Ponding of water on concrete can have bad consequence for concrete so is this something I should bring up with the contractor?

    Second thing is segregation of the concrete on the load bearing walls.

    Again I took a picture.

    Couldn’t get close enough to get a good picture but it looks like there was segregation of the concrete during the pour. Again is this something that should be brought to the attention of the contractor.


Comments

  • #2
    Johnniep
    Registered Users, Registered Users 2 Posts: 203 ✭✭Johnniep


    Hey Kearnsr,

    Are you sure that the water is passing through the basement floor slab and not just pooling from rain water entering ventilation opes etc in the slab above. While water shouldn't be ponding in new builds, it is a more "attractive" water source. Do you know where the water table is at on the site. Generally, a waterproofing barrier (voltex, proofex etc) should always been ploaced on the outsied face between the ground and the RC wall. Fixing a retro-fit system (render etc) would always be a last resort.

    The "segregation" of the concrete is actually an indication of poor vibration of the concrete following placing. Generally, if this is localised, and there is no issue of a high water table, I wouldn't be concerned. However, if there is a water issue and if you are relying purely on the concrete to "waterproof" the basement, the good quality concrete is a vital ingredient (especially if the is no waterproofing membrane installed)

    Hope this helps.

    John


  • #3
    godtabh
    Moderators, Science, Health & Environment Moderators Posts: 23,243 Mod ✭✭✭✭godtabh


    There is a bloke of flats above the car park so I dont think the water exists from opes. Its seems to be run off from the ground level.

    None of the walls seemed to be stained so I would say any waterproofing membrane that was there was doing its job. If it was I think there would be clear signs that it was as the complex is very close to the canal.

    As far as I'm away all underground car parks have to be wateproofed to some extent. Will have to try and find the relevant sections in the code.

    As for the concrete on closer look at the picture it seems to be on in a small place that I could see and the segergation wasnt that "bad" but I would be worried about the bits I cant see.


Advertisement