403Hot Mix Asphalt

Hot Mix Asphalt

Description

403.01This work consists of constructing one or more courses of hot mix asphalt (HMA) on a

prepared base per these specifications, and in conformity with the lines, grades, thicknesses, and typical cross sections shown on the plans or established.

The asphalt pavement shall be composed of a mixture of aggregate, filler if required, and asphalt cement.

Hot Mix Asphalt (Patching) consists of those quantities required for the replacement of unstable corrugated areas in the existing pavement, pipe trenches, areas removed for curb and gutter forms, areas between the curb and gutter or sidewalk and the existing paved parking lots, and areas designated on the plans. These quantities will be restricted to small areas that require hand placement methods and where conventional paving equipment cannot be utilized.

Materials

403.02The materials shall conform to the requirements of subsections 401.02 through 401.06

Construction Requirements

403.03The construction requirements shall be as prescribed in subsections 401.07 through

401.20

Areas to be patched shall be excavated and squared to a neat line, leaving the sides of the excavation vertical. Before placement of the patch, the exposed sides of the existing pavement shall be thoroughly coated with emulsified asphalt (slow-setting). Hot mix asphalt shall then be placed and compacted in succeeding layers not to exceed 3 inches in depth.

Method of Measurement

403.04Hot mix asphalt will be measured as prescribed in subsection 401.21

Basis of Payment

403.05The accepted quantities of hot mix asphalt will be paid for per subsection 401.22, at

the contract unit price per ton for the asphalt mixture.

Payment will be made under:

Pay Item Pay Unit Hot Mix Asphalt (Grading ) Ton Hot Mix Asphalt (Grading ) (Asphalt) Ton Hot Mix Asphalt (Patching) (Asphalt) Ton

403.05

Aggregate, asphalt cement, asphalt recycling agent, additives, hydrated lime, and all other work necessary to complete each hot mix asphalt item will not be paid for separately but shall be included in the unit price bid.

Excavation, preparation, and tack coat of areas to be patched will not be measured and paid for separately but shall be included in the work.

405.01