Скачать или смотреть Sand patch method

The Sand Patch Method is a test used to measure the texture depth of pavement surfaces. Here's the full process and purpose:

Purpose
1. *Texture depth measurement*: Measures the texture depth of pavement surfaces to ensure they meet safety and skid-resistance standards.
2. *Skid-resistance evaluation*: Evaluates the skid-resistance of pavement surfaces to prevent accidents.
3. *Pavement maintenance*: Helps identify areas requiring maintenance or repair.

Equipment Needed
1. *Sand*: Fine, dry, and uniform sand.
2. *Circular template*: A circular template with a diameter of 11.3 inches (286 mm).
3. *Straightedge*: A straightedge or ruler.
4. *Calipers*: Calipers or a depth gauge.

Step-by-Step Process
1. *Prepare the surface*: Clean the pavement surface of debris, dust, and oil.
2. *Apply sand*: Pour sand into the circular template until it's level with the top.
3. *Spread sand*: Use a straightedge or ruler to spread the sand evenly across the template.
4. *Measure texture depth*: Use calipers or a depth gauge to measure the texture depth at several points within the template.
5. **Calculate average
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