502 - HMA Crack Treatment

502 HMA Crack Treatment 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 502

GENERAL

-Reserved-

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MATERIALS

Overband (Alternate 1)

Field blended liquid mixture for overband (Alternate 1) is no longer allowed. All overband material must be from the Qualified Products List (Alternative 2).

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CONSTRUCTION

Overband Delay Periods

a. Stand Alone Overband Crack Fill

b. Micro-Surfacing Preparation – Industry recommends a delay period of 3 days between overband pretreatment and placement of micro-surfacing.

c. Chip Seal Preparation– Industry recommends a delay period of 7-14 days between overband pretreatment and placement of chip seal.

d. Paver Placed Surface Seal Preparation – It is recommended to allow 14 days between overband pretreatment and paver placed surface seal.

e. HMA Ultra-Thin Overlay Preparation– It is recommended to allow 14 days between overband pretreatment and ultra-thin overlay.

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MEASUREMENT AND PAYMENT

Overband Crack Fill and HMA Crack Treatment are now paid for by the lane mile (Lnmi). All shoulder work is considered incidental. A lane mile is defined in the Lane Mile Inventory document which can be found online at http://www.michigan.gov/mdot/0,4616,7-151-9621_15757---,00.html

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