190 405.14.2.2 -Acceptance of Aggregate Dust Content: Dust content will be determined by AASHTO T 11. Adjustments per lot will be as follows. TABLE 405.14.2.2 Adjustment of Contract Item Price for Dust Content % Dust Percent Adjustment 0 – 1.0 2% incentive 1.1 – 2.0 No Adjustment 2.1 – 3.0 2% disincentive 3.1 – 3.5 5% disincentive 3.6 – 4.0 8% disincentive 4.1 – 4.5 12% disincentive >4.5 *Special evaluation to consider remove and replace
405.15 Method of Measurement :
The quantity of “Asphalt Emulsion Material” shall be the number of gallons incorporated into the completed work, which volume will be measured as described in 109.1. The quantity for “Chip Seal, Aggregate Type” shall be paid for by the Square Yard. The quantity will be determined by the Plan Quantity as provided for in the proposal unless otherwise directed by the Engineer.
405.16 Basis of Payment :
The quantiti es, determined as provided above, will be paid for at the contract unit prices and shall be full compensation for the furnishing, hauling, and placing of all materials, all cleaning and sweeping, compaction and for all other materials, labor, tools, equipm ent, supplies, and incidentals necessary to complete the work.
405.17 Pay Items :
ITEM DESCRIPTION UNIT 405007 -* Chip Seal Aggregate, Type ** Square Yards 405010 -* Asphalt Emulsion Material Gallon * Sequence number ** Type of Aggregate Gradation from Section 405.2.1, either A, B, or C. Each aggregate gradation will have its own pay item. For example, a Double Chip Seal would have two pay items; one for Type B and one for Type C gradations. SECTION 406-BLANK 191 SECTION 407 FOG SEAL 407.1 -DESCRIPTION : This work shall consist of preparing and fog sealing an existing roadway surface with asphalt material in accordance with these Specifications and in reasonably close conformity with the lines shown on the Plans or established by the Engineer. 407.2 -MATERIALS : Materials shall be from an approved source and conform to the requirements of the follow ing Subsections: MATERIALS SUBSECTION TYPE Asphalt Emulsion 705.4 SS-1 or SS -1h Cationic Emulsified Asphalt 705.11 CSS-1 or CSS -1h Non-Tracking Asphalt Material 705.13 NTSS -1HM or similar* * Refer to MP 401.02.25 for a list of Certified Asphalt Materials 407.2.1 -Quality Control: Quality control is the responsibility of the Contractor as specified in 106.1. Quality control shall consist of calibrating the distributor to the proper application rate, verifying the volume and temperatu re measuring devices, and when performed, assuring and documenting that the proper dilution rate is maintained. 407.2.1.1 -Acceptance Testing: Approval of asphalt emulsions used for fog seal material will be handled by the Materials Control, Soils and Te sting (MCS&T) Division. MCS&T maintains a list of all approved asphalt emulsion sources and grades. The local District Materials Section can provide a copy of the latest list. The list is also posted on the MCS&T web page under the heading Approved Sour ce/Product Listing. The use of non-approved material without prior testing by MCS&T may result in nonpayment of the item. CONSTRUCTION METHODS 407.3 -WEATHER RESTRICTION : Fog seal shall be applied only when the weather and existing surface are satisfactory to the Engineer and when the temperature of the surface is 50°F or above. When the surface temperature is less than 60°F, care must be exercised to assure that the fog seal sets prior to resuming traffic. 407.4 -EQUIPMENT : Equipment for Surface Preparation may include a power broom and power blower, and a broom drag. Equipment may also include scrapers, hand brooms, shovels, and other equipment as may be necessary to thoro ughly clean the base or surface. Equipment for distribution of asphalt material shall include equipment for heating asphalt material, and a self -powered asphalt material pressure distributor. Equipment for heating asphalt material to the required temper ature shall consist of a retort coil so designed that steam will not be introduced into the material and shall not degrade the emulsion. The distributor shall be so designed, equipped, maintained and operated that asphalt material at even heat may be appl ied