2214.01 DESCRIPTION.
This work shall consist of scarifying the surface of asphalt or PCC pavement to improve the surface profile and cross section, in preparation for resurfacing as a part of the contract. For the purpose of this specification, scarification is a general term meaning removal of a pavement surface, in accordance with the contract documents, by milling with cold planning equipment. When complete removal of asphalt material to an underlying PCC surface is intended, the contract documents may allow this removal by other methods and equipment.

2214.02 EQUIPMENT.
The width of the scarifying equipment shall be sufficient so that not more than two passes will be necessary in each traffic lane. The scarifying width should be suitable for the Contractor's method of operation, and, except for very short or irregular sections, equipment shall be controlled automatically by a two point control with a minimum distance between control points of 15 feet (4.5 m).

A rotary broom described in Article 2001.14 shall be used to clean the surface.

2214.03 CONSTRUCTION.
The contract documents will show the intended depth of scarification and/or the taper or cross section, and the surface shall be scarified as required. Scarification cuts shall be in reasonably straight lines.

The scarification shall be continued across bridges only as shown in the contract documents.

Debris from scarification shall be removed from the pavement surface immediately and handled as specified in the contract documents.

Water shall be used as necessary to minimize flying dust particles.

The scarified surface shall be swept with a rotary broom promptly and before opening to public traffic.

A. Resurfacing.
It is intended that the entire area designated be scarified, leaving a surface with a smooth profile. For extremely irregular areas or where channeling, corner breaks, or settlements have occurred, occasional skips will be allowed, but at least 95% of each 100 feet (30 m) of traffic lane, or equivalent, shall have a newly scarified surface. When a cross section of the scarified surface is shown in the contract documents, the surface shall be scarified accordingly. All scarifying operations shall be controlled to provide a surface that is true within a nominal tolerance of 1/4 inch (5 mm), and 1/4 inch (5 mm) at longitudinal joints where adjacent passes meet. The profile may be inspected by checking with a 10 foot (3 m) surface checker placed parallel to the center line, and variations greater than 1/4 inch (5 mm) shall be corrected.

When asphalt material is to be salvaged for recycling, the following additional requirements are as follows:

The pavement is to be scarified to the depth designated. This is an approximate depth which may be adjusted to assure adequate salvaged material. When wire mesh is present in the asphalt pavement, as indicated in the contract documents, the intention is to scarify without disturbing the wire mesh, unless complete removal of wire mesh is specifically indicated.

Scarification shall be done in a manner that minimizes aggregate degradation.

The scarified and salvaged material shall be weighed on a scale, furnished by the Contractor, meeting requirements of Article 2001.07. The system for determining the quantity stockpiled shall be as directed by the Engineer.

Salvaged material shall be stockpiled in accordance with Article 2303.02.

When Blading and Shaping of Shoulder Material is not required, the existing shoulder material shall be bladed away from the pavement edge, if necessary to provide for safety and drainage. This material may be placed on the foreslope. This work is incidental, and no separate payment will be made.

2214.04 BLADING AND SHAPING OF SHOULDER MATERIAL.
At the locations shown in the contract documents, the existing granular shoulder material shall be bladed away from the pavement and stored in a windrow on the outer portion of the shoulder area. Provisions shall be made for drainage through the windrow, satisfactory to the Engineer. This is to be done before or in conjunction with removal of HMA surface in that area.

After the overlay is completed or as it progresses, the windrowed aggregate shall be returned adjacent to the pavement. Some additional granular surfacing of shoulder material is anticipated, and shaping and compaction as specified for granular surfacing of shoulders will be required. Moistening may be required. If the total thickness of the combination of materials exceeds approximately 3 inches (80 mm), the material returned from the windrow shall be separately compacted, except the finish rolling will be required only on the final surface.

The windrowed material shall be identified with barricades, as described in Article 1107.09, B, 3.

2214.05 LIMITATIONS.
The Contractor shall use every reasonable means to protect persons and vehicles from injury or damage that might occur during the construction period. During the construction, the Contractor shall provide such traffic control as required by the contract documents. Articles 1107.08, 1107.09, and 1108.03 shall also apply.

The road shall be kept open to traffic unless otherwise indicated. Equipment shall not extend into an open traffic lane except as allowed by the traffic control requirements in the contract documents.

Foamed material in existing pressure relief joints shall be removed prior to removal of the HMA surface. This material shall be removed from the project in accordance with Article 1104.08.

Scarification shall be to full width of the lane, with a reasonable runout at the end, before the lane is opened to public traffic.

Scarification shall be planned and completed to leave no vertical drop-off at the center line or lane line overnight. Where an overnight drop-off results from unforeseen conditions, the approaches shall be signed with a ROAD WORK AHEAD sign, and the drop-off shall be marked with vertical panels. The vertical panels shall be placed at 150 foot (45 m) intervals in rural areas and at 50 foot (15 m) intervals in urban areas, with a minimum of three vertical panels at each drop-off location.

When resurfacing is part of the contract, approaches to scarified areas on Primary Roads shall be signed with ROUGH ROAD signs. The signs shall be repeated for traffic that may enter within the scarified area from all intersecting public roads. These signs shall be erected, moved, if appropriate, and maintained by the Contractor until the scarified areas are covered with new mixture.

Preliminary scarifying may be done to obtain representative samples, and these areas shall be patched. Patching should be done daily, and patching necessary to bring the scarified surface to the tolerance specified shall be done within 2 working days of the scarifying operation. Additional patching may be necessary to maintain this temporary surface.

Scarification shall be performed following full-depth patching.

The Contractor shall begin HMA or PCC placement operations within 10 working days after completion of the scarification operation. Once started, placement operations shall occur on each working day until such time that the scarified surface is completely covered. Failure to comply with these requirements will result in the assessment of a price adjustment equal to the liquidated damages stated in the contract documents. The Contractor shall be responsible for repair of damage to the scarified surface occurring during a time period for which liquidated damages are being assessed.

When resurfacing is part of the contract, all scarified surfaces shall be covered with at least one full lift of HMA prior to winter shutdown. The Contractor shall leave no vertical edges or fillets.

The Contractor shall take such additional precautions as necessary for safety during the operation. The Contractor shall hold the Contracting Authority harmless of any damage or loss resulting from an accident, during the scarifying operation, caused by failure to fulfill the obligations as outlined in these requirements.

2214.06 METHOD OF MEASUREMENT.

A. Pavement Scarification.

1. Measurement by Weight (Mass).
When measurement is by weight (mass), the quantity of Pavement Scarification will be expressed in tons (megagrams) and determined from the quantity of scale weights (mass) of the material salvaged.

2. Measurement by Area.
When measurement is by area, the quantity of Pavement Scarification, square yards (square meters), will be the quantity shown in the contract documents.

B. Blading and Shaping Shoulder Material.
The quantity of Blading and Shaping Material, in stations (meters), along each edge of the pavement, will be the quantity shown in the contract documents.

2214.07 BASIS OF PAYMENT.

A. Pavement Scarification.

1. Measurement by Weight (Mass).
The Contractor will be paid the contract unit price for Pavement Scarification per ton (megagram).

2. Measurement by Area.
The Contractor will be paid the contract unit price for Pavement Scarification per square yards (square meters).

B. Blading and Shaping Shoulder Material.
The Contractor will be paid the contract unit price for Blading and Shaping Shoulder Material per station (meter).

These payments shall be full compensation for furnishing all materials, including water, equipment, tools, and labor necessary to complete the work in accordance with the contract documents including salvaging, stockpiling, and removal of excess material and debris in accordance with Article 1104.08. Excess material and debris shall become property of the Contractor. Payment for scarifying will not include areas scarified to obtain preliminary samples, but patching of these areas will be included with patching for payment.