Broken Concrete for retaining wall
I have a plan, to use broken concrete in several terracing retaining walls. This is located on a slope of aprox 50 ft in elevation, and 100+ ft in length. Wall height will be 4 ft or less. This of course will lead to many levels. My question is, can I get away with stacking the broken concrete, and using sand/soil to level each piece, or do I need to use mortar. I plan on river rock for drainage behind the wall, and sloping the walls to the end of each run.