No fines mix is meant for drainage. It's not supposed to have sand. Also the description clearly says the block wall is a retaining wall not a structural wall.
That 'wall' looks like its been already damaged at the top, plus...in which country do you call THAT concrete? I see some cement wasted on loose gravel, which will be loose gravel also after this 'job'...
No fines concrete I've done that, it hardens like honeycomb so water can drain through it, usually goes behind boundary walls, well that's where we did it, delivery driver I was
@@sergiovega1790 There isn’t supposed to be sand... that’s why it’s called “no fines” concrete. Gravel has to be above a minimum size and there’s no sand. The result is a porous mixture that, while adding an enormous amount of mass to the wall (essentially making it into a giant monolithic structure), remains very water-permeable for free drainage. No fines concrete construction enables you to build extremely strong reinforced walls with about 1/3 the excavation and backfill depth you’d need with geotextile reinforcement. It’s an excellent system.
i bet they never will add sand to that mix.. lokking where they used it backfilling what lookd like a concrete block retaining wall. it sont need to be very strong,, It will do its job draining away water so that the trapd water could freeze and expand if the say used dirt as backfilling.
It’s not concrete per se. It’s classified as “no fines”, meaning no fine material (sand). It’s mainly used as drainage. The cement powder still has a binder in it but allows water to drain through.
So why waste the cement.. The rock will let the water thru.. The wall and bank will hold the rock in place And filter fabric will stop the soil from coming into the rock voits... Looks like a salesman sold ice to an Eskimo
concrete consists of water .cement ,stone and sand .wheres the sand?its needed to help bind the cement and stone together .this poor effort will just crack and break up a lot easier .
Yes Traditional concrete has sand (fines) the key is in the title "Permeable" meaning able to drain. the Portland acts still as a binder allowing less movement and shifting but with the added benefit of being able to drain out any water that may get behind the retaining wall. (guessing there is drainage at or near the bottom) All the extra sand and water would put unnecessary stress on the retaining wall and any water behind it during a freezing (frost) cycle will potentially cause the wall to fail. in the same way slabs crack under frost heave. Judging by the snow in the back drop this is a reasonable concern. any questions this might help www.allanblock.com/retaining-walls/no-fines-concrete.aspx
Looks like 1/2" minus or 3/8" pea gravel. No Fines is a misnomer, what you mean is no sand mix. Cement dust is a "fine" powder. I think you end up using more cement in this than a normal mix. What's the resultant PSI of this?
Why do they feel the need to run their bobcats at full throttle? Both machines have plenty of power at half throttle. What a bunch of hacks that love to waste diesel fuel.