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underground water tank
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sysdevPM
#31 Posted : Monday, June 01, 2015 8:23:00 PM
Rank: New-farer

Joined: 6/14/2011
Posts: 32
Location: nairobi
Gathige wrote:
@ african Coloner,

Give me your email i link you up with a fundi who did my two tanks, both semi-underground,and have not had any problem. The fundis who did them used such a simple technology- machine cut stones, no water proofing-, until u doubted them but they gave me such a good guarantee. One of my tanks is 5 yrs old and the other two yrs and both have no leaks at the moment.


Hello gathige
Did you do columns for your ug water tanks ? If so how did the fundis deal with the straight joints ?
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Boris Boyka
#32 Posted : Monday, June 01, 2015 8:41:15 PM
Rank: Veteran

Joined: 11/15/2013
Posts: 1,977
Location: Here
sysdevPM wrote:
Gathige wrote:
@ african Coloner,

Give me your email i link you up with a fundi who did my two tanks, both semi-underground,and have not had any problem. The fundis who did them used such a simple technology- machine cut stones, no water proofing-, until u doubted them but they gave me such a good guarantee. One of my tanks is 5 yrs old and the other two yrs and both have no leaks at the moment.


Hello gathige
Did you do columns for your ug water tanks ? If so how did the fundis deal with the straight joints ?

How large or wide is your tank that needs columns...or are heavy objects like Vehicles going to pass over it?
Everybody STEALS, a THIEF is one who's CAUGHT stealing something of LITTLE VALUE. !!!
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Dahatre
#33 Posted : Monday, June 01, 2015 9:38:32 PM
Rank: Member

Joined: 12/21/2009
Posts: 602
Our tank was repaired by a company called chemroof applicators. The tank had been built with reinforced concrete that was previously waterproofed, but it kept filling up with underground water even before we put the plastic tank inside. These guys tore the old masonry and used a special waterproofing cement to repair the tanks. Its been a year and we have no problems so far.

Assuming they are still in business, their contact info is:

Chemroof (E.A) Applicators Ltd
P.O. Box 64785, 00620
Nairobi, Kenya
Office: 0704 289980/0705186673
Wireless:+254 020 8132857
Mobile : 0733 336113/0720701477
Email: info@chemroof.net
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newfarer
#34 Posted : Tuesday, June 02, 2015 7:39:17 AM
Rank: Elder

Joined: 3/19/2010
Posts: 3,505
Location: Uganda
My neighbour has same problem of water seeping into his septic tank. Mine doesn't at least so far.

I didn't use stones. I used concrete, sand cement and wire mesh.
After digging the hole, we chapaad rough concrete mix then laid chicken wire mesh and chapaad other concrete on it. Then plastered and applied Nil on it. So far so good.
punda amecheka
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sysdevPM
#35 Posted : Tuesday, June 02, 2015 8:04:08 AM
Rank: New-farer

Joined: 6/14/2011
Posts: 32
Location: nairobi
Boris Boyka wrote:
sysdevPM wrote:
Gathige wrote:
@ african Coloner,

Give me your email i link you up with a fundi who did my two tanks, both semi-underground,and have not had any problem. The fundis who did them used such a simple technology- machine cut stones, no water proofing-, until u doubted them but they gave me such a good guarantee. One of my tanks is 5 yrs old and the other two yrs and both have no leaks at the moment.


Hello gathige
Did you do columns for your ug water tanks ? If so how did the fundis deal with the straight joints ?

How large or wide is your tank that needs columns...or are heavy objects like Vehicles going to pass over it?

Hi the excavation is 14 by 12 by 10(depth) . catering for back filling that translates to approx 13 by 11 by 10.
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kayhara
#36 Posted : Tuesday, June 02, 2015 11:52:53 AM
Rank: Veteran

Joined: 5/5/2011
Posts: 1,059
brayokasa4 wrote:
Kihara joni wrote:
The best solution I can give as a contractor is just tile the tank and you are covered for life the plus in this is that cleaning the tank is very easy


Very interesting. Do you put the waterproof cement and then tile the tank?

I just copied a method I saw in china where you the reinforcements are angled at the bottom ( the horizontal and the vertical reinforcements meet at 45 instead of 90, let the rc be 150-200mm thick the cast in one go use water proof concrete, cure for 21 days fill with water add the fix a leak (used in pools) after 2 days clean your tank and fill with clean water for use.
To Each His Own
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Jitahidi
#37 Posted : Tuesday, June 02, 2015 12:06:35 PM
Rank: Member

Joined: 5/8/2008
Posts: 288
kayhara wrote:
brayokasa4 wrote:
Kihara joni wrote:
The best solution I can give as a contractor is just tile the tank and you are covered for life the plus in this is that cleaning the tank is very easy


Very interesting. Do you put the waterproof cement and then tile the tank?

I just copied a method I saw in china where you the reinforcements are angled at the bottom ( the horizontal and the vertical reinforcements meet at 45 instead of 90, let the rc be 150-200mm thick the cast in one go use water proof concrete, cure for 21 days fill with water add the fix a leak (used in pools) after 2 days clean your tank and fill with clean water for use.

Thanks @Kihara joni. I have been wondering how to deal with my underground water tanks and will implement your tiles recommendation
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sikitu
#38 Posted : Tuesday, June 02, 2015 12:18:55 PM
Rank: Member

Joined: 11/2/2007
Posts: 45
I can give a contact for a guy who is doing it with dam Liners and he is giving a warranty of 15yrs.He has done mine and several others that i know.
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newfarer
#39 Posted : Sunday, February 19, 2017 12:06:56 PM
Rank: Elder

Joined: 3/19/2010
Posts: 3,505
Location: Uganda
doing one with reinforced concrete 12x8x10.I have put in black nylon sheet under the concrete and water proofed it.no stone but six reinforcement columns and checked wire.cost now past 120k.just the top cover is remaining.
punda amecheka
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  | | Edit by user: Sunday, February 19, 2017 12:08 PM | Reason: Not specified
tom_boy
#40 Posted : Sunday, February 19, 2017 12:49:45 PM
Rank: Member

Joined: 2/20/2007
Posts: 767
Why dont you consider doing a simple masonry structure with dressed stones. Line the inside of the tank with pond liner, 1.5 - 2mm thick polythene. Should be good for many, many yrs.
They must find it difficult....... those who have taken authority as the truth, rather than truth as the authority. -G. Massey.
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  | | Edit by user: Sunday, February 19, 2017 12:53 PM | Reason: Not specified
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