Hot Mix Asphalt Production Manual - Revision history

JohnsonN23 at 19:14, 19 June 2017

2017-06-19T19:14:40Z

JohnsonN23: added email links

2017-05-17T14:43:11Z

added email links

JohnsonN23: Created page with "The Construction Field Services (CFS) Division has revised the Hot Mix Asphalt (HMA) Production Manual. A brief description of the major revisions is presented below. ===[[#..."

2017-05-17T14:41:24Z

Created page with "The Construction Field Services (CFS) Division has revised the Hot Mix Asphalt (HMA) Production Manual. A brief description of the major revisions is presented below. ===[[#..."

New page

The Construction Field Services (CFS) Division has revised the Hot Mix Asphalt (HMA) Production Manual. A brief description of the major revisions is presented below.

===[[#General | General]]===
* Updates made to formatting of the document and table of contents.

===[[#Section 1: Procedures Manual for HMA Mix Design Processing | Section 1: Procedures Manual for HMA Mix Design Processing]]===
* Marshall Mixtures – Subsection 4: Comment added “2C Designs require 7000g of mixture at optimum”; plus some rearranging of information. (Page 6)
* Marshall Mixtures – Subsection 5: Added two new points at the end. (Page 6)
* Superpave Comparison Level Design Submittal-Subsection 4: Removed “2-1500 grams samples of mixture (Virgin Mix Design only)” and “2-1900 grams samples of mixture “Reclaimed Asphalt Pavement Mixture only”; plus some rearranging of information. (Pages 11, 12)
* Superpave Comparison Level Design Submittal-Subsection 5: Added two new points at the end. (Pages 12, 13)
* Aggregate Requirements-Subsection 3: Added new note “AWI will not be assigned to previously approved mix designs. MDOT will approve AWI for any design that can be used as a top course.” (Page 24)
* New sub-section added under “Calculations” as “4”: Mix Designs with Reclaimed Asphalt Pavement (RAP) and Recycled Asphalt Shingles (RAS)”. (Page 19)
* Aggregate Requirements-Subsection 4“10% Minimum Aggregate Requirement”: Removed. (Page 24)

===[[#Section 3: HMA QA/QC Procedures for Field Testing | Section 3: HMA QA/QC Procedures for Field Testing]]===
HMA Sample Reduction Procedure (Page 46)
* Figure added.
* First point moved to last.
* Some verbiage changed/modified.

Bulk Density Procedure
* Removed.

Checklist for Gyratory Compactor (Page 49)
* Last two sentences of point 4 moved to point 2.
* Additional information added on how to ensure saturated surface dry gyratory specimen.

Extraction Procedures (Page 51)
* Checklist for HMA Mixture Analysis Centrifuge Extraction removed.

Checklist for HMA Mixture Analysis Vacuum Extraction (Page 51)
* Point 8 was reworded as follows: “If the sample weight exceeds 2000 grams, it shall be split into two extractions. The weights from both extractions shall be combined before calculating percentages.”

Checklist for Ignition Furnace (Page 54)
* Removed.
* The following information was added regarding Ignition Furnace: Procedure; Contractor's Responsibilities for the Establishment of Ignition Oven Correction Factors; Calibration of Balance; Lift Test; Temperature Verification inside the Ignition Furnace (In-House Procedure); Maintenance;

Formulas for Calculating Asphalt and VMA (Page 60)
* Title changed, formulas updated.

Procedure for Determining Pavement Density (Page 62)
* Contents divided into Dry Back Method and Core Dry Method.

Rounding Off Method (Page 64)
* Title changed to “Rounding Method”; ASTM E29-93a changed to ASTM E29-08; three additional examples added.

Core Handling and Transporting Procedure (Page 67)
* Two additional points added:
** 9. Contractor may provide his own core transport/storage device.
** 10. If no core transport/storage device is provided, the core transporting procedures will be agreed upon at the pre-production meeting.
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===[[#Section 4: HMA Lab and Technician Qualification Program | Section 4: HMA Lab and Technician Qualification Program]]===
* Table: Minimum Test Methods Required for QA/QC Laboratory Qualification.
* Marshall Test Procedure removed; Ignition Method, Fine Aggregate and Coarse Aggregate Specific Gravity added to the Table.
* Section 4 was removed from the MDOT HMA Production Manual and added to Section 5.03.01 of the MDOT Materials Quality Assurance Procedures Manual (MDOT MQAPM).

The updated manual is available online at: http://www.michigan.gov/documents/mdot_HMA_ProductionManual_79005_7.pdf

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[[Category: Construction Manual]]
[[Category: Division 1]]
[[Category: Division 1 Supplemental]]

@@ Line 1: / Line 1: @@
 The Construction Field Services (CFS) Division has revised the Hot Mix Asphalt (HMA) Production Manual.  A brief description of the major revisions is presented below.
-<div style="text-align: center;">[mailto:Change?body=https://mdotwiki.state.mi.us/construction/index.php/Hot_Mix_Asphalt_Production_Manual Email this Page]</div>
+<div style="text-align: center;">[mailto:Change?body=http://mdotwiki.state.mi.us/construction/index.php/Hot_Mix_Asphalt_Production_Manual Email this Page]</div>
 ===[[#General | General]]===
 * Updates made to formatting of the document and table of contents.
@@ Line 56: / Line 56: @@
 The updated manual is available online at: http://www.michigan.gov/documents/mdot_HMA_ProductionManual_79005_7.pdf
-<div style="text-align: right;">[mailto:Change?body=https://mdotwiki.state.mi.us/construction/index.php/Hot_Mix_Asphalt_Production_Manual Email this Page]</div>
+<div style="text-align: right;">[mailto:Change?body=http://mdotwiki.state.mi.us/construction/index.php/Hot_Mix_Asphalt_Production_Manual Email this Page]</div>
 {{top}}
 [[Category: Construction Manual]]
 [[Category: Division 1]]
 [[Category: Division 1 Supplemental]]