Cavity fill below garage door threshold, strong concrete advised?

[epsilonGreedy]

I need to fill a footing wall cavity that is one block high before laying the curb edging blocks at the car door threshold. Would it be beneficial to mix this as strong concrete rather than typical lean/dry cavity fill? 

[PeterW]

4:1 will be fine - just fill it slightly recessed so the mortar for the edgings has something to key into

[epsilonGreedy]

5 hours ago, PeterW said:

 just fill it slightly recessed so the mortar for the edgings has something to key into

 

 

A champion tip, the wisdom of this advice would only have occurred to me in a couple of years when a few edging blocks had wobbled loose due to car wheel traction up the approach ramp. A Suds planning stipulation for a permeable drive means the outer boundary support for the edging blocks will only be a hardcore ramp.  

Edited May 22, 2019 by epsilonGreedy