The Table of Contents for this section is available.
Stone for plain rip rap shall consist of field stone or rough unhewn quarry stone. The stone shall be sound, tough, dense, resistant to the action of air and water, and suitable in all other respects for the purpose intended. Where broken concrete from demolished structures or pavement is available, it may be used in place of stone provided that such use meets with the approval of the Engineer. However, the use of broken concrete which contains reinforcing steel will not be permitted.
All stone shall meet the approval to the Engineer. While no specific gradation is required, the various sizes of the stone shall be equally distributed within the required size range. The size of an individual stone particle will be determined by measuring its long dimension.
Stone or broken concrete for Rip Rap shall meet the requirements of Table 10421 for the class and size distribution.
No more than 5.0% of the material furnished can be less than the minimum size specified nor no more than 10.0% of the material can exceed the maximum size specified.
The filter fabric shall meet the requirements of Section 1056 for Type 2 fabric.
Rip Rap materials shall be tested in accordance with the requirements
of this section and Sections 10054(E) Resistance to
Abrasion, and 10054(F) Soundness. Satisfactory resistance
to abrasion will be considered to be a percentage of wear of not
greater than 55 percent. Satisfactory soundness will be
considered to be a loss in weight of not greater than 15 percent
when subjected to 5 alterations of the soundness test.