Contractor Poured Air Entrained For Pole Barn Slab - Page 2 - Masonry - Contractor Talk

Contractor Poured Air Entrained For Pole Barn Slab

 
Thread Tools Search this Thread Display Modes
Old 07-28-2020, 07:34 PM   #21
Pro
 
mrcat's Avatar
 
Trade: Pole Barns, Residential Framing
Join Date: Jun 2015
Location: Fingerlakes NY
Posts: 992
Rewards Points: 2

Re: Contractor Poured Air Entrained For Pole Barn Slab


Quote:
Originally Posted by NYCB View Post
I usually specify "no air" for my floors, and of course they still ad air to it, but at a much lower amount. One supplier I use has special mix designs based on application, so they always ask what you are pouring when you order.



I don't pay much attention to the percentages.
I always used to ask for "no air", but one of the dispatchers at Hansen told me if it's a garage floor they are going to put air in it anyway.
They always ask what I'm pouring, so I just specify "low air" now.


Sent from my SM-G930V using Tapatalk
mrcat 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 07-29-2020, 08:20 AM   #22
Pro
 
Fishindude's Avatar
 
Trade: Industrial
Join Date: Aug 2017
Location: Indiana
Posts: 642
Rewards Points: 1,374

Re: Contractor Poured Air Entrained For Pole Barn Slab


After looking at the pics, it looks like "crazing" to me.
This does not typically affect the structural integrity of a slab.

Never a bad idea to have the ready mix supplier rep come take a look and get their two cents worth.
Fishindude is offline  
Old 07-29-2020, 03:35 PM   #23
Pro
 
NYCB's Avatar
 
Trade: Concrete/Masonry
Join Date: Sep 2010
Location: Central NY
Posts: 2,169
Rewards Points: 1,564

Re: Contractor Poured Air Entrained For Pole Barn Slab


Quote:
Originally Posted by mrcat View Post
I always used to ask for "no air", but one of the dispatchers at Hansen told me if it's a garage floor they are going to put air in it anyway.
They always ask what I'm pouring, so I just specify "low air" now.


Sent from my SM-G930V using Tapatalk
Hanson never asks me, they usually just ship it with air unless I tell them otherwise (and I do tell them otherwise because we've gotten floors with air in them).

Robinson will always ask what you are pouring and batch it accordingly.
NYCB is offline  
The Following User Says Thank You to NYCB For This Useful Post:
mrcat (07-29-2020)
Sponsored Links
Advertisement
 
Old 07-29-2020, 08:05 PM   #24
Fire up the BBQ
 
griz's Avatar
 
Trade: GC
Join Date: Nov 2009
Location: ex-calif
Posts: 23,642
Rewards Points: 16

Re: Contractor Poured Air Entrained For Pole Barn Slab


WOW, i don't get how some of you guys work.

the batch plant DOES NOT TELL ME what mix design i need...

I TELL THEM EXACTLY WHAT I WANT...

if the batch ticket does not match what i ordered, the load goes back.

I'm building to pre-determined specs and my contract does not allow me to deviate without an approved RFI...
__________________
SOME JOBS JUST AREN'T WORTH DOING:
griz is online now  
Old 07-29-2020, 10:03 PM   #25
Pro
 
Mike-B's Avatar
 
Trade: General Contractor
Join Date: Feb 2015
Location: Pittsburgh, PA
Posts: 547
Rewards Points: 1,262

Re: Contractor Poured Air Entrained For Pole Barn Slab


I don't remember ever seeing a spec for a slab on grade that did not include at least 3% air. Most of what I see calls for 5-6%%.

Looks like the finishers may have let it get away from them a bit and added some water to the surface in order to complete the finishing process. Just a guess based on the color variations.
Mike-B is offline  
Old 07-30-2020, 05:38 AM   #26
Pro
 
NYCB's Avatar
 
Trade: Concrete/Masonry
Join Date: Sep 2010
Location: Central NY
Posts: 2,169
Rewards Points: 1,564

Re: Contractor Poured Air Entrained For Pole Barn Slab


Quote:
Originally Posted by Mike-B View Post
I don't remember ever seeing a spec for a slab on grade that did not include at least 3% air. Most of what I see calls for 5-6%%.

Looks like the finishers may have let it get away from them a bit and added some water to the surface in order to complete the finishing process. Just a guess based on the color variations.
There's a few articles you can find floating around about finishing air entrained concrete, and that's pretty much what you have to do in order to not peel it.

Get it floated, and let it get tighter than you normally would, then get the steel on it and splash it a bit.

I think most guys have learned that from experience anyway, nothing worse than those first couple passes on a floor with air and having big clods come up off the surface because they are stuck to your shoes.
NYCB is offline  
The Following User Says Thank You to NYCB For This Useful Post:
donerightwyo (09-04-2020)
Old 09-04-2020, 04:12 PM   #27
Pro
 
jomama's Avatar
 
Trade: Concrete & masonry
Join Date: Oct 2008
Location: Wisconsin
Posts: 903
Rewards Points: 178

Re: Contractor Poured Air Entrained For Pole Barn Slab


I know this is a month old, but it's undoubtedly "crazing" shown in the images. Generally, not an issue other than aesthetically. If you're worried about it possibly delaminating, drag a log chain over it and listen for a "hollow" sound in spots. If you hear that, then you have something to worry about.

As for air entrainment, all concrete has what's called "natural air", which naturally occurs due to the mixing process, and is generally around 2% when tested.

We almost always pour "half air" mixes on power trowelled floors, which is about 3.5-4% air. Really cut's down on finishing sandy grit due to excessive bleed water.

We poured and finished full air (~6%) on hard trowelled floors here for years, mostly due to ignorance. Most basements floors were just fine (other than excessive cream pickup on shoes, tools, etc.. that NYCB mentioned above) but get a floor outside in the sun with some wind and low humidity, watch out, it would be become a crap-show real quickly.....

Advertisement

jomama is offline  
The Following 3 Users Say Thank You to jomama For This Useful Post:
donerightwyo (09-04-2020), hdavis (09-04-2020), Rio (09-05-2020)


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


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?