218FOAMED GLASS AGGREGATE

218.1DESCRIPTION—This work is furnishing, transporting, placing, and compacting foamed glass

aggregate (FGA) lightweight fill for construction of embankments and for backfilling behind structures.

218.2MATERIAL—

to the following requirements:

TABLE A Foamed Glass Aggregate Physical Requirements(1) Property Test Method Value Dry Loose Bulk Density, as manufactured (pcf) ASTM C29/C29M, Method C(2) 15 (max.) Moist Loose Bulk Density, as delivered (pcf) ASTM C29/C29M, Method C(2) 20 (max.) Confined Compression Load Required to Obtain 10% Vertical Deformation (psi) EN 1097-11:2013(3) 48.6 (7,000 psf) Confined Compression Load Required to Obtain 20% Vertical Deformation (psi) EN 1097-11:2013(3) 104 (15,000 psf)

density.

TABLE B Foamed Glass Aggregate Size and Grading Requirements, as Manufactured Based on Laboratory Sieve Tests, ASTM C136/C136M(1), Square Openings Sieve Size Percent Passing 4-inch 100 2 1/2-inch 85-100 3/8-inch 0-15

manufactured material.

• Provide FGA produced from at least 98% recycled glass.

• Provide material delivered in bulk.

• Provide manufacturer’s name and material physical properties certification showing conformance to the values as specified in Table A and Table B.

218.3CONSTRUCTION—

recommendations. During all stages of manufacture, shipment, storage, and construction, minimize the amount of handling to prevent physical damage to the material. Store material in an area not prone to flooding. Minimize the amount of trafficking on FGA until geotextile a nd an adequate thickness of capping material (6 inches compacted, minimum) is placed over the FGA. Do not use the FGA placement area as a haul road without an evaluation of the capping material thickness to support the proposed traffic loads. Submit the evaluation to the Department for approval.

of 6 inches deep and all ice before placement of the FGA. Submit documentation for the equipment make, model, and corresponding ground pressure for compaction/ tracked equipment to the Representative for verification and acceptance. Allow 10 working days for review and approval of the compaction or tracked equipment to be used for compaction of FGA. Before placement of FGA, place Class 4, Type A, Geotextile as indicated on the drawings. Install the geotextile as specified in Section 212.3(d). Remove and replace geotextile damaged during construction. Lap fabric over damaged areas and secure fabric lap with sewing, heat bonding, or by overlapping a minimum of 12 inches in all directions. Place FGA at locations indicated on the drawings or as directed by the Representative. The FGA manufacturer’s representative is to remain on -site for the duration of the placement of the FGA material to answer any questions regarding placement of FGA. Place FGA as indicated on the drawings. Minimize the use of wheeled, tracked, or other equipment on the surface of the FGA for activities other than for placement and compaction of FGA. Rollers are not allowed directly on the FGA layer. Avoid compaction that crushes or changes gradation of the FGA. During placement of FGA, do not allow storm water to accumulate in the FGA installation area until a sufficient thickness of FGA, embankment material, or capping material is placed above the anticipated flood elevation to act as ballast. Alternatively, a temporary ballast material or system may be used if approved by the Department to secure the FGA if flooding occurs. For compaction using tracked equipment, place the FGA in maximum uncompacted lift thicknesses of 24 inches. For uncompacted lift thicknesses between 12 inches and 24 inches, perform compaction with a tracked excavator or dozer with ground pressures of between 625 p ounds per square foot and 1,025 pounds per square foot . After placing the initial loose lift, compact the FGA by raising the blade or bucket and tracking over the layer. Compaction will be considered complete after making four full passes with the tracked equipment after the placement of the lift. One full pass is defined as a minimum of 100% coverage of the tracks passing over the top of the lift. Therefore, the equipment has to cross over the site step -wise one-track width at a time to complete one full pass. For areas not accessible by tracked equipment (e.g., around structures, utilities, etc.), place FGA in maximum uncompacted lifts of 12 inches and compact the material with a plate compactor having a static weight of between 110 pounds to 220 pounds. Compaction will be considered complete after making four full passes with the plate compactor. One full pass is defined as a minimum of 100% coverage of the plate passing over the top of the lift. Minimize the amount of trafficking on exposed, compacted FGA. Repair rutting from construction equipment or traffic on compacted FGA exceeding 4 inches in depth by excavating and removing FGA to a depth of 5 inches below the bottom of the rut. Place new FGA material and compact using four passes of a plate compactor. Before placement of capping material, place Class 4, Type A, geotextile over the FGA as indicated on the

drawings. Install the geotextile as specified in Section 212.3(e), except overlap fabric roll-ends and edges a minimum of 12 inches with adjacent material. Remove and replace geotextile damaged during construction. Lap fabric over damaged areas and secure fabric lap with sewing, heat bonding, or by overlapping a minimum of 12 inches in all directions.

specifications as provided in Table A. Perform bulk density testing in the presence of the Representative.

of the geotextile. Use one of the following capping materials overlying FGA:

• Embankment material, as specified in Section 206.3(b);

• Subbase, as specified in Section 350.3;

• Topsoil, as specified in Section 801.3 or 803.3;

• Rock, as specified in Section 850.3.

Place at least six inches compacted thickness of capping material over the FGA in all locations. Do not allow the geotextile to be damaged or disturbed by blading out the capping material. To preclude damage to the geotextile, do not use padfoot rollers fo r compacting the capping material. Complete placement of capping material on top of the FGA before using rollers to compact the fill materials overlying the FGA capping material. Repair any damage to the geotextile that occurs before or during fill placeme nt.

218.4MEASUREMENT AND PAYMENT—

Measure FGA lightweight fill by the cubic yard in its final position as specified in Section 203.4(a)2. Payment includes furnishing, storing, placing and compacting FGA lightweight fill, capping material, and bulk density testing on delivered material. Payment will not be made for wasted material.