DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > crumbling aggregate




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 02-23-2008, 12:34 PM  
RonVT
Junior Member
 
Join Date: Feb 2008
Posts: 1
Default crumbling aggregate

Hi, looking for some advice. I poured an exposed aggregate deck two summers ago and it is crumbling away!! I hand mixed the concrete 3 parts gravel to 1 cement. then washed it with muratic acid and then sealed it with 2 coats of "Day - Chem Cure & Seal 30% (J-23)". After the first winter it was crumbling around the hot tub and one other spot. This year it is getting really bad in the areas exposed to snow & ice. Why did it happen and how might I fix it??
Any suggestions?
Thanks,



__________________
RonVT is offline  
 
Reply With Quote Quick reply to this message
Old 02-23-2008, 01:51 PM  
mudmixer
Contractor
 
mudmixer's Avatar
 
Join Date: Sep 2006
Posts: 592
Liked 44 Times on 36 Posts
Likes Given: 36

Default

Is the aggregate actually crumbling or is it just being released from the comcrete?

You may have "burned" the cement matrix around the aggregate with too much acid or did not wash at the right time for the concentration. This can reduce the resistance to freezing & thawing cyles or ever wetting & drying cylces.

I have no idea of what your climate is like, but you obviously have freezing. Around here, you also need air entrained concrete to resist the freezing & thawing cycles. It is required by code for exposed concrete. Because of this the concrete suppliers end up supplying most of the exposed concrete, since they are familiar with the air entraining admixtures.

__________________
mudmixer is offline  
 
Reply With Quote Quick reply to this message
Old 02-24-2008, 07:19 PM  
glennjanie
Senior Member
 
Join Date: Mar 2006
Posts: 2,990
Liked 2 Times on 2 Posts

Send a message via AIM to glennjanie
Default

Welcome RonVT:
I noticed you didn't mention any sand in your mix. If that is the case there was not enough cement binding for the agregate.
Glenn

__________________
glennjanie is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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 On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Exposed Aggregate Patio Problems betyb4u Bricks, Masonry and Concrete 1 07-24-2008 05:33 AM
Crumbling Joints luanneo Bricks, Masonry and Concrete 5 03-18-2008 02:20 PM
Aggregate Sealant tirefryer Bricks, Masonry and Concrete 2 09-28-2007 05:58 AM
Basement Foundation Cement Blocks Crumbling Help! broloco Bricks, Masonry and Concrete 2 09-20-2007 02:40 PM
exposed aggregate deborah's hb Bricks, Masonry and Concrete 7 06-03-2007 04:39 PM