Article 1 — Description
Prepare pavement surface areas before placement of pavement markings and raised pavement markers (RPMs). Item 677, “Eliminating Existing Pavement Markings and Markers,” governs removal of existing markings.
Article 2 — Materials
When abrasive blasting is used, use a commercial abrasive blasting medium capable of producing the specified surface cleanliness. Use potable water when water is required.
Article 3 — Equi Pment
Furnish and maintain equipment in good working condition. Use moisture and oil traps in air compression equipment to remove all contaminants from the blasting air and prevent the deposition of moisture, oil, or other contaminants on the roadway surface.
Article 4 — Construction
Prepare enough pavement surface for the pavement markings or RPMs shown on the plans. Remove all contamination and loose material. Avoid damaging the pavement surface. Remove loose and flaking material when existing pavement markings are present. Approved pavement surface preparation methods are sweeping, air blasting, flail milling, and blast ing methods in accordance with Section 677.4.3., “Blasting Method,” unless otherwise shown on the plans. Air blast concrete pavement surfaces, in addition to the above, after the removal of contamination or existing material and just before placing the stripe. Perform air blasting using a compressor capable of generating compressed air at a minimum of 150 cu. ft. per minute and 100 psi using 5/16- in. or larger hosing. Contaminants up to 0.5 sq. in. may remain if they are not removed by the following test, performed just before application of markings . Step 1 . Air blast the surface to be tested, to simulate blasting during application of markings. Step 2 . Firmly press a 10- in. long, 2- in. wide strip of monofilament tape onto the surface, leaving approximately 2 in. free. Step 3 . Grasp the free end and remove the tape with a sharp pull.
Article 5 — Measurement
This Item will be measured by the foot for each width specified; by each word, shape, or symbol; or by any other unit except lump sum. This is a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal, unless modified by Article 9.2., “Plans Quantity Measurement.” Additional measurements or calculations will be made if adjustments of quantities are required. 923 6. PAYMENT The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Pavement Surface Preparation for Markings” of the type and width as applicable. This price is full compensation for the cleaning method used, materials, equipment, labor, tools, and incidentals .