657 RipRap for Tree Protection

1. Specification:

Item 657.02 C&MS

2. Sampling and/or Inspection Requirements:

Furnish stone consisting of sandstone, limestone, or other natural rock with a minimum 30% single slab loss and a maximum 20% cumulative loss after testing to ASTM D5240.

Use an 8 slab test sample.

The Department may waive testing when the stone source has a known durability history.  Contact the OMM Aggregate Section for sampling instruction.

Furnish embankment according to Item 203. Unless otherwise specified, use 4" (100 mm) pipe conforming to 603 Type E conduits.

3. Methods of Tests:

Physical Tests

ASTM D5240

(OMM Aggregate Section)