Need Experts to Weigh-In

Reply

  #1  
Old 04-10-10, 05:26 PM
Member
Thread Starter
Join Date: May 2009
Location: NY
Posts: 109
Received 0 Votes on 0 Posts
Need Experts to Weigh-In

Hi,

I had a new concrete garage floor poured this past Thursday. Everything looked great initially however now that it is dried I have lots of white spots showing up. Perhaps they are water spots - not sure. I'd appreciate if the concrete/masonry experts can provide their professional opinion and what I can do. I posted a few photos here -

Image hosting, free photo sharing & video sharing at Photobucket

Thanks everyone

FC
 
Sponsored Links
  #2  
Old 04-11-10, 03:24 AM
Member
Join Date: Feb 2005
Location: USA
Posts: 1,396
Received 0 Votes on 0 Posts
That's just the concrete curing. Eventually, it will be all or mostly white/light gray. No worrys (unless there are no crack control joints, then worry.)
 
  #3  
Old 04-11-10, 06:08 AM
Member
Thread Starter
Join Date: May 2009
Location: NY
Posts: 109
Received 0 Votes on 0 Posts
Thanks Pecos. Pleased to hear that as I thought it was something more serious. We used finished expansion joints using 1/2 " fiberboard strips placed around the inside perimeter of the foundation walls. Poured 3500 PSI with fiber so I'm hoping there are no cracks.

Quick follow-up - after the floor was poured and floated my contractor did not cover the concrete with plastic. I've read different opinions here where concrete is supposed to be covered to help the curing process. Anyway, what's your take on this? Thanks

FC
 
  #4  
Old 04-11-10, 12:13 PM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: Twin Cities, MN
Posts: 13,057
Received 73 Votes on 65 Posts
[QUOTE=fatclemenza;1716382] Poured 3500 PSI with fiber so I'm hoping there are no cracks.
/QUOTE]

There is two types of concrete: One is cracked, and one going to crack. It is pretty much unavoidable. This is the reason for control joints.
 
  #5  
Old 04-11-10, 05:32 PM
Member
Join Date: Feb 2005
Location: USA
Posts: 1,396
Received 0 Votes on 0 Posts
Agreed. Expansion joint on the perimeter does not negate the need for contraction joints cut into the slab.
 
  #6  
Old 04-12-10, 09:17 AM
Member
Thread Starter
Join Date: May 2009
Location: NY
Posts: 109
Received 0 Votes on 0 Posts
Is it not too late to saw in contraction joints into the slab? It's been drying/curing for 5 days now.
 
Reply

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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: