I screwed up the base of my retaining wall


  #1  
Old 10-23-15, 04:08 PM
L
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I screwed up the base of my retaining wall

I'm installing a 2 ft tall retaining wall w/ 4x8x12 concrete block (non-interlocking).

I ordered 5/8 clean gravel and have put most of it in the base trench. I read that I should have used 5/8 minus crushed rock. I'm guessing the minus rock will compact better and be more level to support the wall block than clean gravel.

I haven't totally filled my base trench; my idea was to add sand to the clean gravel that is there and mix is best I can before running a plate compactor over it....or perhaps just pour sand over the top and compact it?

Or is clean gravel by itself OK to set the block on?

Thanks for any advice
 
  #2  
Old 10-24-15, 03:46 AM
M
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Welcome to the forums!

It's always been my understanding that block that is mortared together needs to have a concrete footer ..... but I'm a painter, wait and see what some of the others have to say.
 
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Old 10-24-15, 04:58 AM
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do it as recommended in the other forum - sand is not compactible even w/proper moisture content as is graded aggregate base material
 
  #4  
Old 10-24-15, 08:36 AM
M
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I certainly agree with marksr, if you are building a mortared wall the footings need to be poured concrete. Anything that's not will eventually flex and break the wall. You should also use a minimum block size of 8x8x16 for a retaining wall, the 4" blocks you have will topple over with minimum pressure from the backside.
 
  #5  
Old 10-26-15, 07:20 AM
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Concrete footer below the frost line for mortared walls.

Short version is I think you need to start over at the planning stage. Sorry, I know that's not what you wanted to hear.
 
 

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