Yes, you can potentially use building sand for concrete, but not on its own and only under specific conditions to ensure strength.
While sharp sand is typically the aggregate of choice for concrete due to its angular particles interlocking well, the reference states that you rarely use sharp sand for concrete.
Using Building Sand for Concrete
According to the information provided, if you intend to use building sand for concrete, you must add 20mm stone with it to create a strong mix.
Why Adding Stone is Crucial
Building sand alone lacks the larger aggregate (like gravel or crushed stone) necessary to form a strong, durable concrete mix. Building sand is primarily used for:
- Creating brick/block mortar: This requires a softer, more workable mix than structural concrete.
Using building sand without the correct proportions of larger aggregate (like the recommended 20mm stone) will not produce concrete suitable for load-bearing structures or anything requiring significant strength. It will more closely resemble a weak mortar or screed.
Key Takeaway
To make concrete using building sand, remember the critical requirement:
- Building Sand + Cement + Water + 20mm Stone = Concrete Mix
Omitting the 20mm stone when using building sand will result in a mix only suitable for mortar.
In summary: Using building sand is possible for concrete according to the reference, but only when combined with 20mm stone to achieve the necessary strength. Building sand by itself is primarily for mortar.
