02378 Aggregate and Filter Fabric.docx

SECTION 02378

AGGREATE AND FILTER FABRIC

PART 1: GENERAL

1.1 SUMMARY

A. Section Includes: Providing aggregate used for geo-cell layer and filter fabric.

1.2 DEFINITIONS

A Satisfactory Materials: Materials classified in ASTM D 2487 as GW, GP, SW and free from roots and other organic matter, trash, debris, and frozen materials and stones larger than 100 mm (4 inches) in dimension are satisfactory.

B Unsatisfactory Materials: Materials which do not comply with the requirements for satisfactory materials are unsatisfactory. Materials classified in ASTM D 2487 as Pt, OH, and OL are unsatisfactory. Unsatisfactory materials also include human-made fills, refuse, or backfills from previous construction.

1.3 SUBMITTALS

A. General: Submittals shall be according to Section 01009 - General Information and Requirements.

PART 2: PRODUCTS

2.1 MATERIALS

A. Crushed Aggregate: Aggregate shall consist of hard, durable particles of fragments of stone or gravel free from thin, flat, and elongated pieces. Crushed aggregate shall be crushed stone or crushed gravel and an approved soil binder or natural filler, where required, conforming to the following requirements unless otherwise approved the Contracting Officer. The composite materials shall be free from clay balls, vegetable matter, and other deleterious substances and shall not contain an excess of thin or elongated pieces. Aggerate shall meet the following requirements for crushed aggregate, with a plasticity index of not less than three (3) or greater than eight (8). The Contractor shall be responsible for obtaining the material required to meet the plasticity index requirements. Aggregate shall be compacted to ninety (90%) percent of optimum compaction as determined by testing.

1. Crushed aggregate material shall meet the following gradation:

B. High Strength Woven Geotextile Fabric: Shall be woven from long chains of synthetic polymers composed of at least 85% by weight of polyolephins, polyester, or polimides. The fabric shall meet the following requirements:

Permeability (sec-1) Min. . . . . . .0.26 Max. . . . . . .0.70

PART 3: EXECUTION

3.1 PREPARATION

A. Clearing: Slopes to be protected by geo-cell and filter fabric shall be free of brush, trees, stumps, and other trash. Dress to a smooth surface.

3.2 INSTALLATION

A. Placement of High Strength Woven Geotextile Fabric: Fabric shall be placed on a smooth prepared roadway and sloped. The finished installation shall present a smooth unwrinkled surface against the underlying soil. The fabric shall be anchored to prevent movement when the geo-cells and aggregate is placed over it. The fabric material shall not be exposed to sunlight for more than 2 days prior to covering with gravel. Fabric edges may be sewn, bonded or lapped. When lapped, the overlap shall not be less than 1500 mm (5 feet).

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Units: The work described in this section will be measured and paid for by the cubic yard. Geotextile fabric will be measured and paid for by Lump Sum.

4.2 BASIS OF PAYMENT

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

Pay Item Description Pay Unit

END OF SECTION

AGGREATE AND FILTER FABRIC

4/2020 WFO Bluebank Low Water Crossing Project 02378 -