Base For Concrete - Construction - Contractor Talk

Base For Concrete

 
Thread Tools Search this Thread Display Modes
Old 03-23-2019, 12:13 PM   #1
Member
 
arudam's Avatar
 
Trade: Paving stone
Join Date: Mar 2019
Location: Manitoba
Posts: 44

Base For Concrete


Hey all, We built an ICF Pool, and still have one section of the floor to pour. This section is in a shallow end so it is raised about 3 feet off an already poured concrete pad, id like to get this poured soon, i had wanted to continually soak this fill with water to get great compaction but since the walls are ICF and the floor beneath the fill is already concrete, is it an issue if the fill is at all wet prior to pouring on top since technically the moisture would be trapped for good after all the concrete is complete? There will be rigid foam under the new pad as well, it has hydronic floor heat. Does this make sense?
arudam is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

   

Advertisement

 

Old 03-23-2019, 12:18 PM   #2
Member
 
arudam's Avatar
 
Trade: Paving stone
Join Date: Mar 2019
Location: Manitoba
Posts: 44

Re: Base For Concrete


This sectiom has a solid sealed concrete base already, with about 2-3 feet fill above, and will have concrete floor placed on top now
Attached Thumbnails
Base for concrete-screenshot_20190323-121551_gallery_1553361405580.jpg  

Advertisement

arudam is offline  
Old 03-23-2019, 02:47 PM   #3
Member
 
buildercn's Avatar
 
Trade: Construction Management
Join Date: Aug 2018
Location: Toronto
Posts: 34
Rewards Points: 120

Re: Base For Concrete


I wouldn't pour on top of the wet fill. It's likely to cause issues down the road. Once the moisture drys out it could heave or sag on you.

Maybe consider replacing the fill with u-fill or an engineered fill to backfill it? Neither of those require compaction. U-Fill would take a day to set up but the engineered fill could be poured over the same day.
__________________
Construction Project Manager - 10+ Years
Toronto Market - Construction Consulting
buildercn is offline  
Sponsored Links
Advertisement
 
Old 03-23-2019, 02:51 PM   #4
Pro
 
dayexco's Avatar
 
Trade: entrepreneur of excavating expertise
Join Date: Mar 2006
Posts: 6,382
Rewards Points: 218

Re: Base For Concrete


you over saturated the soil in hopes of compaction? or did i read that wrong?

what happens when that water migrates out of your excavation? personally, i'd have a civil look at it and give you a plan of attack.

cracks or structure failure isn't worth it.
dayexco is online now  
Old 03-23-2019, 02:59 PM   #5
Member
 
arudam's Avatar
 
Trade: Paving stone
Join Date: Mar 2019
Location: Manitoba
Posts: 44

Re: Base For Concrete


Thanks guys, I thought of saturating it to assist in compaction but so far have done nothing. removing the fill wouldnt be very fun. Its 2ft deep of fill so not really much (in a 12'x10' area), i could just run my small packer over it a bunch. So far it should still be relatively dry as the fill was dry when i put it down in fall and it has been tarped over winter. being completely sealed would the moisture ever actually leave? grade 10 science has long come and gone lol i would be more worried about heaving in winter as oppose to the fill settling as its a 6" pad getting poured , rebar 12" o.c.
arudam is offline  
Old 03-23-2019, 04:37 PM   #6
Pro
 
dayexco's Avatar
 
Trade: entrepreneur of excavating expertise
Join Date: Mar 2006
Posts: 6,382
Rewards Points: 218

Re: Base For Concrete


Have you ever seen soil from am excavation that comes out in layers of light clay, heavier clays, layers of course gravel, and layers of fine sand.

Now they're all mixed in your spoil pile and a combination/compaction of dissimilar soils can create problems with future soils expansion and shrinkage due to moisture content of soils changing.

I agree with above, get that soil you placed in the excavation pulled, and go with flowable fill.

Sent from my SCH-I545 using Tapatalk
dayexco is online now  
Old 03-23-2019, 10:56 PM   #7
GC/carpenter
 
Calidecks's Avatar
 
Trade: Decking, Railing, Carpenter/General Contractor
Join Date: Nov 2011
Location: Anaheim Hills, California (OC)
Posts: 36,511
Rewards Points: 18,268

Re: Base For Concrete


We are required by our engineers to completely saturate soil that's got a high content of clay in some cases. Then pour a structural slab on top. The idea is to expand the clay first to prevent heaving. Then a structural slab should be designed well enough to support itself if the clay shrinks.

When I say saturate I mean able to stick a prod into the soil about 12 inches without a lot of force.


Mike.
_______________

Advertisement


Last edited by Calidecks; 03-23-2019 at 10:58 PM.
Calidecks is offline  
The Following User Says Thank You to Calidecks For This Useful Post:
Rio (03-24-2019)


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Glue for rubber cove base to FRP panels? TIGHTER MITER General Discussion 3 10-09-2014 10:23 AM
Replace Base, Caulk, Paint - Without Recutting in wall paint? Spencer Painting & Finish Work 24 08-28-2014 01:03 AM
base trim on island Kent Whitten Finish Carpentry 40 03-03-2012 01:14 AM
Scaffolding - Base Width Question ZachElwood Health & Safety 2 11-09-2010 02:09 PM
Router Table base cabinet. ApgarNJ Tools & Equipment 83 11-06-2010 12:39 AM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for
PROFESSIONAL CONTRACTORS ONLY!

At DrywallTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?