Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-09-2010, 10:03 PM   #1
Newbie
 
Join Date: Jun 2009
Posts: 4
Rewards Points: 10
Default

Small holes forming in newly poured concrete


I just had a concrete patio poured and about two days later, after the first rain, small holes started appearing in the surface - pinhole size up to about 1/8 inch. By each hole is a dark streak. I thought at first that these were small pieces of dirt and I could wash them away, but the dark streak is a stain on the concrete. It looks like something is just below the surface of the concrete and it pops through the surface like a pimple, leaving the streak.

I'm beginning to wonder if they are small pieces of iron or steel, and are rusting out and breaking through the surface. Has anyone here ever seen anything like this?

chitownIrish is offline   Reply With Quote
Old 07-09-2010, 11:11 PM   #2
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000
Default

Small holes forming in newly poured concrete


Where are you located ?
Weather conditions the day of the pour ?

Scuba_Dave is offline   Reply With Quote
Old 07-09-2010, 11:28 PM   #3
Registered User
 
Join Date: Mar 2009
Posts: 9,967
Rewards Points: 2,000
Default

Small holes forming in newly poured concrete


While you are waiting for our concrete experts to answer: http://www.todaysconcretetechnology....blowholes.html

Be safe, Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Old 07-10-2010, 01:21 AM   #4
Concrete & Masonry
 
Join Date: Nov 2008
Location: Wisconsin
Posts: 2,788
Rewards Points: 2,128
Default

Small holes forming in newly poured concrete


It is somewhat hard to troubleshoot something like this over the web, but it sounds to me like foliage from surrounding trees or bushes...................
jomama45 is online now   Reply With Quote
Old 07-10-2010, 03:24 PM   #5
Registered User
 
Join Date: Mar 2009
Posts: 9,967
Rewards Points: 2,000
Default

Small holes forming in newly poured concrete


A few times after a slab pour, I have had the rust stains appear. Once it was from the wire (fence type- 2" x 4") reinforcing steel bleeding and rising with the air bubbles from working the water on top. Did they install any steel rebar or ? A few times I could not figure out where the stains came from..... I guessed it was steel (rusting) flaking off the mixing paddles at the concrete plant, though I never confirmed this. Or possibly oil from the truck/chutes delivering it? Impurities in the mixing drum from the water or insides of the mixer? Wait for more replies........

Be safe, Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Poured concrete cure time? sandyman720 Building & Construction 13 12-27-2009 10:48 PM
small holes in drywall mud kimmyb General DIY Discussions 5 01-26-2008 10:21 AM
correcting slightly uneven small concrete surface amakarevic Building & Construction 5 01-16-2008 08:38 PM
new concrete floor next to old concrete floor mattroos Building & Construction 10 08-28-2007 02:32 PM
stone veneer formula tom1st Landscaping & Lawn Care 1 07-08-2006 05:48 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.