Concrete and Mortar

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  #1  
Old 01-13-19, 01:23 PM
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Smile Concrete and Mortar

A stairway on one side of my garage had sagged along with the floor. I'm going to have the floor lifted but I decided to first create a footer for the stairway and the landing above separate from the garage floor. So I cut through the floor, created a 2.5 foot deep footer with about 8 inches of concrete reinforced with rebar. On top of that are three coarses of block and mortar. The footer is about 8 feet long overall.

The question I have is how long should I give it to cure before applying significant weight to it? I'm guessing a week would be OK but I could use a qualified opinion please.

Cheers!
 
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Old 01-13-19, 01:32 PM
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A lot depends on the mix of the concrete... but generally it is safe to build on after 7 days. Concrete continues to cure beyond that and gets even stronger by the end of a month but I doubt you will be putting point loads on it that would exceed it's current strength. I'd say that after 7 days it's probably at 60% of its full strength. See this chart for a better idea of average cure times.

http://www.ce.memphis.edu/1101/notes...hics/conc3.gif
 
  #3  
Old 01-13-19, 02:33 PM
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Excellent, thanks! That helps a lot. It's been a week for the footer but only a few days for the block.

Cheers!
 
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