Hello everyone, I've been thinking about standing outside the basement window and operating a cement mixer, but I need something simple that can work as a chute down to the basement where I plan to pour about 40m2 with approximately 5 cm overlay on a roughly cast slab.
Has anyone managed to do this with a simple homemade wooden chute or some kind of duct or similar? The concrete is regular stiff, cheap Probau fine concrete.
Maybe I could use some flow agent to make it run better.
Interested in your experiences.
Has anyone managed to do this with a simple homemade wooden chute or some kind of duct or similar? The concrete is regular stiff, cheap Probau fine concrete.
Maybe I could use some flow agent to make it run better.
Interested in your experiences.
40 m2 X 0.05 m = 2 cubic meters of concrete, which is a bit too little to use a concrete pump. Otherwise, it would have been the easiest. But talk to a concrete station about agents that make the concrete more fluid and delay the curing so you have time to mix.
I cast in a similar way, although my slab was around 10 square meters. Used pre-mixed bags from Bauhaus. We were two, so it worked but was tiring, and the question is if you can manage with only one mixer and fewer than 2-4 people?
I made a chute with formwork plywood, approximately 40cm wide with 20cm high edges. I made the height on the outside high enough to dump directly from the mixer, so I had to prop it up slightly. This made it harder when filling it, but it paid off at the other end. Unfortunately, I made the slope of my chute too shallow, so we didn't get a perfect flow and had to assist a little with a shovel. Unfortunately, the alternative for me would have been to prop up the mixer more, so I left it as it was.
The size of my slab was not an issue to distribute everything from one pile, but I wouldn't recommend it for larger areas. My concrete drop height was around 1 meter on the inside, and note that it will splash quite a bit.
Had I done it again on the same area, I would probably have used the same tactic, but for larger areas, I would definitely use pre-mixed and pump it in.
I made a chute with formwork plywood, approximately 40cm wide with 20cm high edges. I made the height on the outside high enough to dump directly from the mixer, so I had to prop it up slightly. This made it harder when filling it, but it paid off at the other end. Unfortunately, I made the slope of my chute too shallow, so we didn't get a perfect flow and had to assist a little with a shovel. Unfortunately, the alternative for me would have been to prop up the mixer more, so I left it as it was.
The size of my slab was not an issue to distribute everything from one pile, but I wouldn't recommend it for larger areas. My concrete drop height was around 1 meter on the inside, and note that it will splash quite a bit.
Had I done it again on the same area, I would probably have used the same tactic, but for larger areas, I would definitely use pre-mixed and pump it in.
Ah, great! Form plywood will be good. We have a 1.8m height, so a slightly better angle. Did you manage with the max water mix on Probau? Or did you use any plasticizers or similar? Shoveling is no problem, as long as we don't have to run with buckets.M myrstack said:
We're planning to manage it with two people.
We're not casting the entire slab at once, but in stages. Hoping to make a 10 m path at best. The area is just for leveling before Platon and further insulation, etc.
I agree with Leif that you need to add flytmedel. I'm doubtful about using a 10m ramp, I would probably have used a concrete mixer through the window into a wheelbarrow.
Only the amount of water specified on the bag for me, so if you have a better angle, it should at least flow down better than for me. I guess if the chute can tilt up to 45 degrees, it should flow well with the ready-mix concrete.KJD said: