Difference between revisions of "502 - HMA Crack Treatment"

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(Created page with "502 - HMA Construction Practices * 501.01 - Materials * 501.02 - Equipment * 501.03 - Surface Preperation * 501.04 - Adjusting Drainage Structures * [[501.05 ...")
 
 
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502 - HMA Construction Practices
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<center><span STYLE="font: 60pt arial;">'''502'''</span></center>
  
* [[501.01 - Materials]]
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<center><span STYLE="font: 40pt arial;">'''HMA Crack Treatment'''</span></center>
* [[501.02 - Equipment]]
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* [[501.03 - Surface Preperation]]
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<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/502%20HMA%20Crack%20Treatment.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 502]</center>
* [[501.04 - Adjusting Drainage Structures]]
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* [[501.05 - Wedging]]
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* [[501.06 - Bond Coat]]
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==[[#GENERAL|GENERAL]]==
* [[501.07 - Placing HMA Mixture]]
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* [[501.08 - Joints]]
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'''HMA Crack Treatment on Roads With Centerline or Shoulder Corrugations (Rumble Strips)'''<br />
* [[501.09 - Compaction]]
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If a transverse crack that will be routed or sawed intersects a corrugation (rumble strip), stop the reservoir six inches short of the corrugation. Overband crack fill the remaining six inches, as well as the crack within the corrugation. If there are secondary cracks within the corrugation, limit the overband to the primary crack; the overband width should not exceed four inches.
* [[501.10 - Coring]]
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If the longitudinal joint located within a corrugation requires overbanding, apply the overband continuously along the longitudinal joint. If there are secondary cracks, limit the overband within the corrugation to the primary longitudinal crack and do not exceed four inches in width.
* [[501.11 - Surface Defects]]
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Allow a maximum overband thickness of ½ inch when overband crack filling within a corrugation.
* [[501.12 - Surface Tolerances]]
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* [[501.13 - Payment]]
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==[[#MATERIALS|MATERIALS]]==
* [[501.14 - Paving Inspectors]]
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===[[#Overband (Alternate 1)|Overband (Alternate 1)]]===
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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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{{top}}
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==[[#CONSTRUCTION|CONSTRUCTION]]==
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===[[#Overband Delay Periods|Overband Delay Periods]]===
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a. Stand Alone Overband Crack Fill
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b. Micro-Surfacing Preparation – Industry recommends a delay period of 3 days between overband pretreatment and placement of micro-surfacing.
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c. Chip Seal Preparation– Industry recommends a delay period of 7-14 days between overband pretreatment and placement of chip seal.
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d. Paver Placed Surface Seal Preparation – It is recommended to allow 14 days between overband pretreatment and paver placed surface seal.
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e. HMA Ultra-Thin Overlay Preparation– It is recommended to allow 14 days between overband pretreatment and ultra-thin overlay.
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{{top}}
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==[[#MEASUREMENT AND PAYMENT|MEASUREMENT AND PAYMENT]]==
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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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{{top}}
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[[Category:Construction Manual]]
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[[Category:Division 5]]
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[[Category:Section 502]]

Latest revision as of 16:09, 6 May 2021

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


GENERAL

HMA Crack Treatment on Roads With Centerline or Shoulder Corrugations (Rumble Strips)
If a transverse crack that will be routed or sawed intersects a corrugation (rumble strip), stop the reservoir six inches short of the corrugation. Overband crack fill the remaining six inches, as well as the crack within the corrugation. If there are secondary cracks within the corrugation, limit the overband to the primary crack; the overband width should not exceed four inches. If the longitudinal joint located within a corrugation requires overbanding, apply the overband continuously along the longitudinal joint. If there are secondary cracks, limit the overband within the corrugation to the primary longitudinal crack and do not exceed four inches in width. Allow a maximum overband thickness of ½ inch when overband crack filling within a corrugation.

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).

[top of page]


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.

[top of page]


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

[top of page]