303AGGREGATE PAVEMENTS OR SHOULDERS

303.01Description

This work shall consist of placing a dense-graded compacted aggregate on prepared subgrade in accordance with 105.03.

MATERIALS

303.02Materials

Materials shall be in acco rdance with the following: 10

Coarse Aggregate, Class D or Higher, Size No. 73* ... 904 * Surface courses only, when specified.

CONSTRUCTION REQUIREMENTS

303.03Preparation of Subgrade

Subgrade shall be prepared in accordance with 207.04. Proofrolling will not be required in trench sections and other areas where proofrolling equipment cannot be 20 used.

303.04Temperature Limitations

Aggregate shall not be placed when th e air temperature is less than 35°F. Aggregate shall not be placed on a frozen subgrade. Frozen aggregate shall not be placed.

303.05Spreading

Aggregate shall be spread in uniform lifts with a spreading and leveling device 303.05

approved by the Engineer. The spreading and leveling device shall be capable of 30 placing aggregate to the depth, width, and slope specified. The compacted depth of each lift shall be a minimum of 3 in. and a maximum of 6 in., except where utilized as a shoulder. The compacted depth of a lift for a shoulder shall be a minimum of 3 in. and a maximum of 9 in.

Aggregate shall be handled and transported to minimize segregation and the loss of moisture. In areas inaccessible to mechanical equipment, approved hand spreading methods may be used.

The moisture content of the aggregate shall be between 4% and the optimum 40 moisture content when the ag gregate is delivered to the project. Water shall not be added to the aggregate on the grade.

303.06Compacting

Compaction shall be in accordance with 301.06.

All displacement or rutting of the compacted aggregate shall be repaired prior to placing subsequent material.

303.07Checking and Correcting Base and Surface 50

The top of each aggregate course shall be checked transversely and all deviations in excess of 1/2 in. shall be corrected. If additional aggregate is required, the course shall be remixed and recompacted.

303.08Dust Palliative

A dust palliative, if required, shall be in accordance with 407.

303.09Method of Measurement

Compacted aggregate will be measured by the ton in accordance with 109.01(b) for the type specified. 60

303.10Basis of Payment

The accepted quantities of compacted aggregate will be paid for at the contract unit price per ton, for the type specified, complete in place.

Payment will be made under:

Pay Item Pay Unit Symbol

Compacted Aggregate, No. 53 .................................................. TON 70 Compacted Aggregate, No. 73 .................................................. TON

The cost of placing, compacting, wate r, and necessary incidentals shall be included in the costs of the compacted aggregate.

303.06

Payment will not be made for material placed outside of a 1:1 slope from the planned typical section.

Replacement or repair of pavement or shoulders damaged by the Contractor’s operations shall be at no additional payment. 80