No, sharp sand is generally not suitable for use as play sand.
While sand is often perceived as a single material, different types are graded and processed for specific purposes. Understanding these differences is key when selecting materials for various applications, including children's play areas.
Understanding Different Sand Types
Sands are classified based on several factors, including:
- Grain Size: Fine, medium, or coarse.
- Grain Shape: Angular ('sharp') or rounded.
- Processing: Washed or unwashed.
- Source: Quarry location affects colour and composition.
What is Sharp Sand?
Sharp sand, also known as concreting sand or coarse sand, is characterized by its angular grains. These sharp edges allow the grains to interlock, making it ideal for applications requiring strength and stability.
- Primary Uses:
- Mixing with cement to create concrete.
- As a base layer under paving or driveways.
- Some building and landscaping purposes.
What is Play Sand?
Play sand is specifically processed for use in children's sandboxes and play areas. It is typically:
- Fine-grained: Smoother texture.
- Washed: Removes fine particles, silt, and impurities.
- Rounded Grains: The edges are often rounded through processing or natural wear, making it soft to the touch.
Comparing Sharp Sand and Play Sand
Here's a quick comparison of the two types:
| Feature | Sharp Sand | Play Sand |
|---|---|---|
| Grain Shape | Angular, 'Sharp' | Rounded |
| Texture | Coarse, Gritty | Soft, Fine |
| Processing | Often unwashed or lightly | Typically washed |
| Primary Use | Building, Concrete, Base | Children's Play, Sandbox |
| Suitability for Play | Poor - rough texture | Excellent - soft & safe |
Why Sharp Sand is Not Suitable for Play Sand
The primary reason sharp sand is unsuitable for play sand comes down to its physical properties and how it compares to the requirements for a safe and enjoyable play environment.
- Rough Texture: As its name suggests, sharp sand has angular grains. These sharp edges can feel rough and abrasive against skin, unlike the soft, smooth feel of washed play sand.
- Potential for Irritation: The rough texture could potentially cause minor scrapes or irritation, especially for young children with sensitive skin.
- Contains Fines and Impurities: Sharp sand is often not thoroughly washed, meaning it may contain more fine dust, silt, or other impurities compared to washed play sand. These can become airborne or dirty clothes easily.
The distinction between different sand types for specific uses is important in construction as well. For instance, when it comes to pointing or plastering, a different type of sand is preferred. As one reference notes:
"Sharp sand isn't what you would use for pointing ordinarily. You need soft washed or plasterer's sand. Sand colour is independent of whether or not it is sharp or washed. It is solely a function of which pit it was dug from."
This highlights that sand types are selected based on the task; just as sharp sand isn't the go-to for fine finishing like pointing (where a softer, washed sand is needed), it's also not suitable for the soft, clean requirements of a children's play area.
What Sand Should Be Used for Play Areas?
Always use sand specifically labelled and sold as "play sand" for sandboxes and children's play areas. This sand has been washed, screened, and processed to ensure it is fine, soft, and free from harmful impurities, making it safe and pleasant for children's activities.
