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That depends on the size of your bags!

My bags are 25 kg (20 l)

5 inches is 120 mm

I would use 2 bags of cement and 4 bags of sand and 6 bags of gravel (well I do not buy my gravel in bags but the equivalent volume).

I would mix with as little water as necessary to get a pourable consistency.

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11y ago
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Q: How many bag of cement and sand per square meter at 5 inches thick concrete slab?
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