Technical_Exhibit_E _W91151-16-B-0028 _24_Aug_16.pdf

Technical Exhibit E AD000344P‐ Reconstruct South Range Road

Headquarters III Corps, Fort Hood Directorate of Public Works (DPW)

Technical Exhibit “E”

AD000344P –

Repair South Range Rd

Contract No. W91151-16-C-XXXX

Directorate of Public Works Engineering Division US Army, III Corps

4612 Engineer Dr.Fort Hood, TX 76544

Pulverizing

1. DESCRIPTION

This specification shall govern pulverizing an existing pavement and base in-place, adding crushed aggregate if required, mixing this material with water, and shaping and compacting the mix to produce a base.

2. MATERIALS

If required, add crushed aggregate to bring the finished surface to the established line, grade, and cross-section. Furnish hard, durable particles or fragments of crushed stone or gravel conforming to the size and quality requirements for crushed aggregate material normally used locally in the construction and maintenance of highways by Federal or state agencies. Furnish crushed aggregate with a maximum size of 1 inch (25 millimeters) as determined by AASHTO T 27 and AASHTO T 11. Furnish crushed aggregate uniformly graded from coarse to fine and free of organic matter, lumps or balls of clay, and other deleterious material. Crushed aggregate will be paid for under line item 205, Flexible Base Material.

3. EQUIPMENT

Pulverizing. Furnish a road reclaimer that is:

(a) Self-propelled;

(b) Specifically manufactured for in-place reclamation;

(c) Capable of reducing the existing material to the required size;

(d) Equipped with at least an 8-foot (2.4-meter) minimum cutting width

(e) Equipped with standard automatic depth controls adjustable in increments of ½ inch (13 millimeters); and

(f) Equipped with sufficient horsepower to constantly pulverize to the required depth in a single pass.

4. CONSTRUCTION OR WORK METHODS

Use the reclaimer to pulverize the existing roadway material, in-place until 100 percent passes the 2-inch (50-millimeter) sieve. Reprocess or remove larger particles, debris, unsuitable material, and excess material as follows:

Remove from project:

Recycle or dispose of material legally off the project or as directed by the Contracting Officer. Submit a statement documenting the nature and quantity of material processed or sold for recycling. Otherwise, submit a signed copy of the disposal agreement before disposal begins.

Mixing and Spreading:

Add water as necessary to adjust the moisture content of the mixture to within 2 percent of the optimum for compaction. Mix to produce a homogenous full depth mixture. Spread the mixture uniformly across the existing roadbed to provide a final compacted shape according to the established line, grade, and cross-section.

Compacting:

Determine the maximum density of the mixture according to AASHTO T 180, Method D.

Compact each layer full width. Roll from the sides to the center, parallel to the centerline of the road. Along curbs, headers, walls, and places not accessible to the roller, compact the material with approved tampers or compactors.

Compact each layer to at least 95.0 percent of maximum density. Determine the in-place density and moisture content according to AASHTO T 310 or other approved test procedures.

Surface Tolerance:

If grade finishing stakes are required, finish the surface to within ±0.05 feet (±10 millimeters) from staked line and grade elevation.

If grade finishing stakes are not required, shape the surface to the required template and check the surface with a 10-foot (3-meter) straightedge. Defective areas are surface deviations in excess of ½ inch (13 millimeters) in 10 feet (3 meters) between two contacts of the straightedge with the surface.

Correct defective areas by loosening the material, adding or removing material, reshaping, and compacting.

Maintenance:

Maintain the aggregate course to the correct line, grade, and cross-section by blading, watering, rolling, or combination thereof until placement of the next course. Correct defects according to the Surface Tolerance specification.

5. MEASUREMENT

Measurement and payment for Full Depth Reclamation shall be measured in square yards for the depth indicated in the plan drawings.

6. PAYMENT

The accepted quantities will be paid at the contract price per unit of measurement. Payment will be full compensation for the work prescribed in this Section.

SAMPLING, TESTING AND ACCEPTANCE REQUIREMENTS

Material or Product

Characteristic Test Methods Specifications

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Existing roadbed material or aggregate surfacing

Classification

Moisture-density

Density

AASHTO

M 145

T 180 Method D

Or

AASHTO T 99

Method C

T310

1 test Per soil type

1 test per mixture or change in material

In-place after compaction

Roadbed

Processed material

Yes

No

N/A

Before using in work

End of shift