SECTION 02275

RIPRAP

PART	GENERAL

SECTION INCLUDES

Riprap [in sacks].

RELATED SECTIONS

Section 02207 - Aggregate Materials.

Section [02225 - Trenching] [02222 - Excavating]: Excavating for riprap.

Section 02223 - Backfilling.

Section 02242 - Soil Cement Stabilization.

Section 02245 - Lime Soil Stabilization.

Section 02609 - Pipe Culverts.

UNIT PRICE - MEASUREMENT AND PAYMENT

Riprap:

Basis of Measurement: By the square [yard] [________] ([meter] [________]) of rip rap area; summing the areas of individual layers, of riprap [sacks].

Basis of Payment: Supply and placement of riprap [mix in sacks, moist cured].

QUALITY ASSURANCE

Perform Work in accordance with [[State] [Municipality] of [________] [Highways] [Public Work's] standard.]

Maintain [one copy] [[____] copies] of [each] document on site.

PART	PRODUCTS

MATERIALS

Riprap Materials: Provide in accordance with [[State] [Municipality] of [________] [Highways] [Public Work's] standards.]

****** [OR] ******

Riprap: [Granite] [Limestone] [________] type; [broken stone] [irregular shaped rock] [________]; solid and nonfriable; [____] inch ([____] mm) minimum size, [____] inch ([____] mm) maximum size.

****** [OR] ******

Riprap: [Broken stone] [Irregular shaped rock] [________], [____] inch ([____] mm) minimum size, [____] inch ([____] mm) maximum size; solid and nonfriable.

Aggregate Type [A1] [____]: As specified in Section [02207] [________].

Bags: [Woven jute] [Geotextile fabric] [________].

Binder: [Portland cement] [Lime] [________].

Geotextile Fabric: Non-biodegradable, [woven] [non-woven] [________]; [________] manufactured by [____________].

BAGGED RIPRAP

Mix riprap, cement [, sand] and aggregate dry. [Quantity of cement not to exceed [10] [____] percent of dry mixed materials by volume.]

Bagging: Fill bags with dry ingredients to 70 percent capacity and close by sewing or stapling to a straight seam.

PART	EXECUTION

EXAMINATION

Do not place riprap bags over frozen or spongy subgrade surfaces.

PLACEMENT

[Place geotextile fabric over substrate, lap edges and ends.]

Place riprap at [culvert pipe ends] [at embankment slopes] [and] [________] [, as indicated].

Place [bags] into position. [Knead, ram or pack the filled bag to conform to contour of adjacent material and other bags previously placed.]

Place [bags] in a staggered pattern. Remove foreign matter from bag surfaces.

Installed Thickness: [5] [____] inch ([125] [____] mm) average.

After placement, spray with water to moisten the bagged mix. Maintain moist for 24 hours.

SCHEDULES

Culvert Pipe Ends: Bagged, placed one layer thick, 6 inch average thickness, concealed with topsoil fill.

Sloped Grade At Retaining Wall: Individual riprap units, 6 inch thickness; placed prior to finish topsoil.

END OF SECTION