ᐅ Pouring a slab foundation (4x4 m) yourself: Is a concrete mixer suitable?
Created on: 27 May 2021 11:26
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MaxMustaman92
Hello,
I want to create a concrete slab foundation with dimensions of 4m x 4m x 20cm (13ft x 13ft x 8 inches). In about one month, a small garden shed made of 175cm (69 inches) calcium silicate bricks will be built on top, which should later be used to store tools and equipment with heavy weight.
The planned layers beneath the slab foundation from top to bottom are: PE foil, insulation, and a compacted gravel layer. The total depth of all these layers is 60cm (24 inches), plus the 20cm (8 inches) slab foundation. The surrounding strip footing (frost protection) is planned to be 30cm (12 inches) wide and 90cm (35 inches) deep.
This results in approximately 3.2 cubic meters (113 cubic feet) of concrete needed, which I plan to mix myself in a ratio of 1:4 (480kg cement: 1920kg gravel + 240 liters water).
Questions:
1. Is a concrete mixer still suitable for this amount, or should I hire a company to deliver ready-mix concrete? I would prefer to avoid the latter due to cost reasons if possible.
2. Are there any other recommendations or tips for carrying out my project?
I want to create a concrete slab foundation with dimensions of 4m x 4m x 20cm (13ft x 13ft x 8 inches). In about one month, a small garden shed made of 175cm (69 inches) calcium silicate bricks will be built on top, which should later be used to store tools and equipment with heavy weight.
The planned layers beneath the slab foundation from top to bottom are: PE foil, insulation, and a compacted gravel layer. The total depth of all these layers is 60cm (24 inches), plus the 20cm (8 inches) slab foundation. The surrounding strip footing (frost protection) is planned to be 30cm (12 inches) wide and 90cm (35 inches) deep.
This results in approximately 3.2 cubic meters (113 cubic feet) of concrete needed, which I plan to mix myself in a ratio of 1:4 (480kg cement: 1920kg gravel + 240 liters water).
Questions:
1. Is a concrete mixer still suitable for this amount, or should I hire a company to deliver ready-mix concrete? I would prefer to avoid the latter due to cost reasons if possible.
2. Are there any other recommendations or tips for carrying out my project?
HilfeHilfe schrieb:
Wow… a garden shed made of masonry? I have a wooden shed on compacted gravel.A 20cm (8 inch) concrete slab is generally standard for houses as far as I know. I think he wants to store heavy equipment, maybe an excavator and truck parts? Certainly not wheelbarrows and gardening tools.O
Osnabruecker27 May 2021 15:10That’s 7.5 m³ (9.8 yd³)... 18 tons...
And that’s exactly one concrete mixer. Get a quote.
Then from a building material supplier who will dump your driveway full of sand and deliver a pallet of cement...
If possible: ready-mix concrete from the plant!
And that’s exactly one concrete mixer. Get a quote.
Then from a building material supplier who will dump your driveway full of sand and deliver a pallet of cement...
If possible: ready-mix concrete from the plant!
N
nordanney27 May 2021 16:46Before I mix 18 tons of concrete for a 10sqm (108sq ft) garden shed — and that’s just for the foundation slab plus strip foundations, insulation, membranes, etc. — I would first consider what I actually need.
The foundation is enough for a small rocket launch pad; for such a tiny garden shed, it’s massively oversized.
What tools or equipment do you have in the shed that weigh several tons?
The foundation is enough for a small rocket launch pad; for such a tiny garden shed, it’s massively oversized.
What tools or equipment do you have in the shed that weigh several tons?
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MaxMustaman9227 May 2021 19:05Hello,
first of all, thank you for all the answers.
What would be a good, cost-effective alternative if I want to build a 4x4 meter (13x13 feet) tool shed made of aerated concrete blocks (Ytong) or calcium silicate bricks, where heavy items may be stored on the floor for extended periods in the future (especially heavy building materials like stacked tile packages and roof tiles)? Is there an alternative to a concrete foundation if the shed floor needs to easily support around 150 to 200 kg/m2 (31 to 41 lbs/ft2)?
first of all, thank you for all the answers.
What would be a good, cost-effective alternative if I want to build a 4x4 meter (13x13 feet) tool shed made of aerated concrete blocks (Ytong) or calcium silicate bricks, where heavy items may be stored on the floor for extended periods in the future (especially heavy building materials like stacked tile packages and roof tiles)? Is there an alternative to a concrete foundation if the shed floor needs to easily support around 150 to 200 kg/m2 (31 to 41 lbs/ft2)?
H
HilfeHilfe28 May 2021 05:53nordanney schrieb:
Before pouring 18 tons of concrete for a 10sqm (108 sqft) garden shed—just for the foundation slab plus strip footing, insulation, membranes, etc.—I would first consider what you actually need.
That foundation is suitable for a small rocket launch site; it’s way oversized for such a tiny garden shed.
What tools or equipment do you plan to store in the shed that weigh several tons? Maybe he wants the base because of the Cold War?
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