411Asphalt Materials

Asphalt Materials

Description

411.01This work consists of furnishing asphalt materials of all types and the application of

these materials per these specifications and details shown on the plans.

Materials

411.02All asphalt materials shall conform to the requirements of Section 702

The type and grade of asphalt material will be specified in the Contract. The grade may be changed one step by the Engineer at no change in unit price except as provided for under subsection 104.02.

Emulsion used for seal coat will be identified as rapid setting or medium setting emulsion and conform to the requirements of subsection 702.02.

Construction Requirements

411.03Asphalt materials shall be fortified when required by the Contract with an additive of an

approved type. Additive shall be uniformly blended with asphalt materials at the refinery, or through an approved in-line blender as specified in the Contract.

Asphaltic application methods that result in the discoloration of concrete structures, concrete curbs, and concrete gutters will not be permitted. Coatings shall be applied so as to cause the least inconvenience to traffic and to permit one-way traffic. Traffic will be permitted to travel on fresh asphalt material when it can be accomplished without pickup or tracking of the asphalt material.

Asphaltic materials used as fuel or lubricant shall be stored separately.

Emulsified asphalt for tack coat shall be diluted before use as shown in the Contract or as directed.

Method of Measurement

411.04Asphalt cement will be measured by the ton by one of the following methods as

determined by the Engineer:

tons of paving mix by the weighted average of all asphalt content percentages obtained from the field acceptance tests for that item, or

cement delivered to the job corrected by tank stabs. Emulsified asphalt and liquid asphaltic materials will be measured by the gallon. The pay quantity for emulsified asphalt shall be the number of gallons before dilution with water.

411.05

Concentrated asphalt rejuvenating agent will be measured by the gallon before any water is added. Emulsified asphalt used for seal coat will be measured by the actual number of tons placed and accepted. The pay quantity of emulsified asphalt will be determined from the invoices of emulsified asphalt delivered to the project, corrected by any weight of remaining emulsion in the distributor truck or tanker at the conclusion of the project. The Engineer may elect to calculate the remaining weight in a distributor by use of the average specific gravity of materials delivered, or by tank stabs. The average specific gravity for this calculation will be as determined by Central Laboratory Testing. If tank stabs are to be utilized for this measurement, the Contractor’s Process Control Plan shall include appropriate information for calculations on the distributor used on the project. This calculation will be limited to less than 4,000 gallons of material. All other material shall require weigh back for proper calculation of payment. The weight shall be determined by certified scales per Section 109. This will also be monitored and documented by daily distributor gauge readings and yield calculations. All proposed methods of weighing materials, calibrating distributor rates and monitoring the yields shall be included in the Process Control Plan per Section 409.

Diluted emulsified asphalt used for fog seal on chip seals will be measured by the actual number of tons of asphalt before dilution with water. Correction for the final diluted emulsion at the conclusion of a project will assume a 3:2 emulsion to water dilution rate, and the water subtracted from the weight of the remaining product unless otherwise approved.

Basis of Payment

411.05The accepted quantities, measured as provided above, will be paid for at the

contract unit price per ton or gallon as the case may be, for each of the pay items listed below that appear in the bid schedule.

Payment will be made under:

Pay Item Pay Unit Asphalt Cement ( ) Ton Emulsified Asphalt ( ) Gallon Emulsified Asphalt (Rapid-Setting) (Polymerized) Ton Emulsified Asphalt (Medium-Setting) (Polymerized) Ton Liquid Asphaltic Material ( ) Gallon Asphalt Rejuvenating Agent Gallon Recycling Agent Gallon

High float emulsified asphalt (polymerized) or emulsified recycling agent used in Item 406, Cold Asphalt Pavement (Recycle) will be paid for by the gallon under the pay item Recycling Agent.

Water used to dilute emulsified asphalt or asphalt rejuvenating agent will not be paid for separately but shall be included in the work.

412.01