SECTION 705 - STONE BLANKET PROTECTION AND FILTER BLANKET MATERIALS
705.01 Stone Blanket Protection . In addition to meeting the quality requirements of
AASHTO M 80, Class E, stone blanket prot ection shall be in accordance with AASHTO M 43, Size No. 357.
705.02 Stone Filter Blanket . In addition to meeting the quality requirements of
AASHTO M 80, Class E, filter blanket material shall conform to the gradation requirements of AASHTO M 43, Size No. 467.
705.03 Sand Filter Blanket . The sand filter blanket shall conform to the gradation
requirements of Subsection 703.02 for concrete sand.
705.04 Stone Riprap. Aggregate for loose riprap, stone riprap for foundation protection,
or that to be grouted shall consist of field stone, broken concrete, or rough, unhewn quarry stone as nearly rectangular in section as is practicable. The stone shall be dense, free of clay or shale seams, resistant to the action of air and water, and suitable in all other respects for the purpose intended. Quality requirements for rock to be furnished under these specifications will come from a pre-approved source or be visually approved prior to use. Stones for riprap, of the size sp ecified, shall meet the requireme nts for size by weight of the mass as specified in the following table:
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