Hello
I have dug a large hole and will pour a concrete slab (450 x 500 cm (177 x 197 inches)) in it. On top of that, I will place formwork blocks. It will be something like a vaulted cellar but without the vault.
The soil is natural clay. I am still unsure whether to use gravel or RCL as the bottom layer. RCL was used under my house, and the road I built next to my house is also constructed with RCL. It is simply cheaper. Are there any advantages to gravel besides it being guaranteed environmentally friendly?
The excavation pit is approximately 500 x 550 cm (197 x 217 inches). I need to work within this space.
I plan to fill the entire base of the pit with 15 cm (6 inches) of gravel or RCL and compact it (either by vibrating or tamping). On top of that, a layer of dimpled membrane, then 20 cm (8 inches) of concrete (of course, formwork will be installed first). Two layers of reinforcing mesh should be sufficient.
Is there anything that could be criticized here?
Steven
I have dug a large hole and will pour a concrete slab (450 x 500 cm (177 x 197 inches)) in it. On top of that, I will place formwork blocks. It will be something like a vaulted cellar but without the vault.
The soil is natural clay. I am still unsure whether to use gravel or RCL as the bottom layer. RCL was used under my house, and the road I built next to my house is also constructed with RCL. It is simply cheaper. Are there any advantages to gravel besides it being guaranteed environmentally friendly?
The excavation pit is approximately 500 x 550 cm (197 x 217 inches). I need to work within this space.
I plan to fill the entire base of the pit with 15 cm (6 inches) of gravel or RCL and compact it (either by vibrating or tamping). On top of that, a layer of dimpled membrane, then 20 cm (8 inches) of concrete (of course, formwork will be installed first). Two layers of reinforcing mesh should be sufficient.
Is there anything that could be criticized here?
Steven
Hello
Two or three questions for the practitioners:
The usual material for the capillary break layer here is limestone gravel 0-45. I have calculated that I need 4.1 m³ for a 15 cm (6 inches) layer. Some volume will be lost due to compaction. I am planning to order 5 m³. Will that be enough?
Now about compaction: I have a vibrating plate, but it only weighs 60 kg (132 lbs). I am thinking of applying the limestone gravel in layers of 3-4 cm (1–1.5 inches) and then compacting. Is that realistic, or won’t the layers become firm enough?
I also made a 20 kg (44 lbs) tamper. What do you think about using that? After five minutes of tamping, my tongue feels like it’s on the floor, but should I tamp again after using the vibrating plate?
Steven
Two or three questions for the practitioners:
The usual material for the capillary break layer here is limestone gravel 0-45. I have calculated that I need 4.1 m³ for a 15 cm (6 inches) layer. Some volume will be lost due to compaction. I am planning to order 5 m³. Will that be enough?
Now about compaction: I have a vibrating plate, but it only weighs 60 kg (132 lbs). I am thinking of applying the limestone gravel in layers of 3-4 cm (1–1.5 inches) and then compacting. Is that realistic, or won’t the layers become firm enough?
I also made a 20 kg (44 lbs) tamper. What do you think about using that? After five minutes of tamping, my tongue feels like it’s on the floor, but should I tamp again after using the vibrating plate?
Steven
blockhauspower17 Jul 2016 10:32There will be a load-bearing reinforced concrete slab on top. From experience, I would say that your compaction using the vibrating plate should be sufficient. The compressive stress will not be very high since you are creating a very large surface area.
Regards
Regards