Someone covers it further down. There's a whole bunch more to the strength of concrete than the aggregate.
Man last major concreting I did smooth sand would have been awesome. We were already trying to use the finest grade sand we could find. It was on mad max 4. Making concrete not look like concrete (think underwater caverns, cliffs, waterfalls). So smooth is awesome, makes it easy to texture to look like different types of weathered rock.
All the structural strength was from steel rebar with chook mesh wired to it. The crete and scratch coats were about 100mm thick at the most.
Man last major concreting I did smooth sand would have been awesome. We were already trying to use the finest grade sand we could find. It was on mad max 4. Making concrete not look like concrete (think underwater caverns, cliffs, waterfalls). So smooth is awesome, makes it easy to texture to look like different types of weathered rock.
All the structural strength was from steel rebar with chook mesh wired to it. The crete and scratch coats were about 100mm thick at the most.