Hello
I am going to build a room using concrete form blocks. The floor slab is about to be completed.
I will be using concrete blocks measuring 50x25x30 cm (20x10x12 inches). Reinforcement is clear. I would like to mix the flowing concrete myself. A concrete mixer is available.
Now the questions: Which aggregate size should I use for the concrete? What is the mixing ratio (aggregate to cement)? What additives are necessary to achieve flowing concrete? Is the concrete truly "self-compacting," or will I need to assist with a tamping rod or a vibration device?
I need 200 liters (53 gallons) of concrete per square meter of wall surface.
Steven
I am going to build a room using concrete form blocks. The floor slab is about to be completed.
I will be using concrete blocks measuring 50x25x30 cm (20x10x12 inches). Reinforcement is clear. I would like to mix the flowing concrete myself. A concrete mixer is available.
Now the questions: Which aggregate size should I use for the concrete? What is the mixing ratio (aggregate to cement)? What additives are necessary to achieve flowing concrete? Is the concrete truly "self-compacting," or will I need to assist with a tamping rod or a vibration device?
I need 200 liters (53 gallons) of concrete per square meter of wall surface.
Steven
S
Sebastian7918 Aug 2016 08:12No, that’s really something different – with the concrete blocks, only the bottom layer needs to be accurate, but with sand-lime bricks you actually need to know how to lay masonry – or else use adhesive, but even then you’ll have to level things out.
Otherwise, I agree with you – these basic skills should be mastered.
Otherwise, I agree with you – these basic skills should be mastered.
Hello Jochen
Sand-lime bricks cost me almost twice as much in material expenses. Also, I can’t do the masonry myself and would need to hire someone for that. I like working with concrete and stones. The formwork blocks are quite easy to handle. Only the concrete tamping is a lot of work.
Does anyone have a tip on how to make concrete more fluid without adding more water?
Stefan
Sand-lime bricks cost me almost twice as much in material expenses. Also, I can’t do the masonry myself and would need to hire someone for that. I like working with concrete and stones. The formwork blocks are quite easy to handle. Only the concrete tamping is a lot of work.
Does anyone have a tip on how to make concrete more fluid without adding more water?
Stefan
S
Sebastian7918 Aug 2016 08:39Steven schrieb:
Does anyone have a tip on how to make concrete thinner without adding more water?Huh? Is that question seriously meant? And earlier you mentioned this isn’t your first project?
That really makes me doubt—how much reinforcement are you including?
Sebastian79 schrieb:
Hä? Ist die Frage echt ernst gemeint? Hello Sebastian
This is a serious question.
If it were that simple, could you tell me which additive I can use to make the concrete more fluid without adding more water? Adding more water is counterproductive after all.
The reinforcement is specified by a structural engineer.
Steven
S
Sebastian7918 Aug 2016 08:59There are flow enhancers available, but it seems like you basically want to add water to avoid compacting.
However, you will still need to compact, because you can't make it that fluid. Could you borrow a vibrating bottle (vibrating compactor)?
However, you will still need to compact, because you can't make it that fluid. Could you borrow a vibrating bottle (vibrating compactor)?
Hello Sebastian
I don’t want to add more water. But the concrete should be more fluid. The last formwork blocks, about 20m² (215 sq ft), I filled with earth-moist concrete and then tamped. That was really hard work. But the result is rock solid. Nothing will break through that.
Borrowing a vibrating poker is no problem. But does that work with formwork blocks? I’m afraid the blocks might shift out of alignment.
Steven
I don’t want to add more water. But the concrete should be more fluid. The last formwork blocks, about 20m² (215 sq ft), I filled with earth-moist concrete and then tamped. That was really hard work. But the result is rock solid. Nothing will break through that.
Borrowing a vibrating poker is no problem. But does that work with formwork blocks? I’m afraid the blocks might shift out of alignment.
Steven
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