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 11-14-2007, 09:02 AM   #1
Member
 
Join Date: Apr 2007
Posts: 2,248
Share |
Default

gravity: laying two vertical levels of concrete simultaneously


if i am laying two levels of concrete simultaneously, like i am making steps, is there a specific technique to prevent draining the top level through spilling over the lower level, amid liquid dynamics ?

my cocnrete experience thus far has been limited to single plane forms.

simply, when i try to explain it to myself theoretically, i see the top level sinking down and spilling through the bottom amid gravity.

amakarevic is offline   Reply With Quote
Old 11-14-2007, 09:15 AM   #2
Member
 
Join Date: Aug 2006
Posts: 190
Default

gravity: laying two vertical levels of concrete simultaneously


Proper concrete mix is not that free-flowing. Which is why you need to vibrate and/or agitate it during pours in order for it to completely fill the forms. You could attach cover over bottom step to prevent push-up when you pack in the upper section, but soon as you are done, you should be able to open it up in order to trowel the bottom step smooth.

scorrpio is offline   Reply With Quote
Old 11-14-2007, 09:20 AM   #3
Member
 
Join Date: Apr 2007
Posts: 2,248
Default

gravity: laying two vertical levels of concrete simultaneously


that makes sense.
amakarevic is offline   Reply With Quote
Old 11-15-2007, 11:31 AM   #4
Member
 
Join Date: Jul 2007
Posts: 1,523
Default

gravity: laying two vertical levels of concrete simultaneously


They put in step footings like this all the time. You might not even have to "lid" off the top of the lower steps or maybe just the first few inches. I just poured a step footing with 16 " steps (total 4'8" height change over 12 feet) without any "lids".

I did have a 2x4 brace across the bottom of the plywood end panels of the steps that might have prevented some flow but I actually put it in to prevent the plywood from bowing to keep the end of the step flat.

Just work your way from bottom to top filling with crete, vibrate each section as you go and screed it off. The vibration will cause the next lower section to raise some so once you are done with the highest section then rescreed from highest to lowest (doing the highest section first and lowest section last keeps you from pushing the crete down into the section you just screeded off).

That's what worked for me.
jogr 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
laying stamped concrete over old tile Kimmarie Flooring 24 03-20-2012 12:20 PM
new concrete floor next to old concrete floor mattroos Building & Construction 10 08-28-2007 01:32 PM
Pulling up tile and laying bamboo on concrete kdhughes Flooring 2 07-19-2007 11:11 PM
Need to expand existing concrete pad for A/C unit miketegra Building & Construction 2 07-03-2005 10:27 PM




Top of Page | View New Posts

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