just finished first home paving project with recycled bricks over crushed rock and washed sand. all fine and compacted. now i need to dam the edges with concrete. how would the crushed rock go in a concrete mix? given that it's every size from 20mm stones to dust but also already in the back yard. would it be better to trailer in the usual aggregate?
what sort of mix? would the fines in crushed rock do the work of some of the sand? say a 1:1:4 mix? any advice will be greatly appreciated