Caltrans Changes SECTION 39

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Caltrans ChangesSECTION 39Hot Mix Asphalt

• Presented by
• Terrie Bressette
• Caltrans

2
What Changed? TERMS

• Hot Mix Asphalt (HMA) Asphalt Concrete (AC)
• Rubberized HMA (RHMA) Rubberized AC (RAC)
• Open Graded Friction Course (OGFC) OGAC
• RHMA-G RAC (Type G)
• RHMA-O -O-HB RAC (Type O) (Type O-HB)
• Tack Coat Paint Binder (Tack Coat)
• Geosynthetic Pavement Interlayer
• Pavement Reinforcing Fabric (PRF)

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What Changed?Section 39 AC vs. HMA

• Old Standard Specifications
• Section 39 AC 12,000 Words
• New Amended to Read
• Section 39 HMA 18,000 Words
• SSPs
• Section 39 AC 21 SSPs
• 58,000 Words
• Section 39 HMA 12 SSPs
• 28,500 Words

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What Changed?Standard Special Provisions

• 12 SSPs from 30 Old SSPs
• 39-AAA HMA Type A B
• 39-BBB OGFC
• 39-CCC RHMA-G
• 39-DDD RHMA-O RHMA-O-HB
• 39-EEE HMA (Misc. Areas)
• 39-FFF Minor HMA
• 39-GGG Rumble Strips (Ground in)
• 39-HHH HMA-Lime Slurry
• 39-III HMA-Dry Lime
• 39-JJJ HMA-Liquid Anti-Strip
• 39-KKK Prime Coat
• 39-LLL Replace AC Surface

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What Changed?Standard Special Provisions

• New SSPs
• 39-MMM Large Stone Mix
• 39-NNN High Stability Mix
• 39-OOO Bonded Wearing Course (Gap-Graded)
• 39-PPP Bonded Wearing Course (Rubberized)
• District Requested
• Extra testing required by aggregate issues
• Lime-slurry marination required

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Section 39 CHANGESMix Designs

• Still Hveem Method of Mix Design
• Dense Graded HMA (Type A B) Rubberized HMA
  RHMA-G
• Mix Design by Producer
• State Verifies JMF with Plant Mix
• Mix design good for 12-months
• Flat Elongated
• Open Graded OGAC, RHMA-O O-HB
• Aggregate qualities and gradation by Producer
• State determines asphalt content
• Mix design good for 12-months

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Section 39 CHANGESMaterials

• Aggregate Qualities
• Gradation (TV Tolerance)
• LA Rattler
• Sand equivalent
• Crushed Particles (2-face New)
• Fine Aggregate Angularity (New)
• Flat Elongated (New)

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Section 39 CHANGESMaterials

• Mix Qualities
• Binder Content
• Air voids content
• Stability (Mix Production)
• HMA moisture content
• Voids in Mineral Aggregate
• (Mix Design Verification)
• Voids Filled with Asphalt (Mix Design Only)
• Dust Proportion (Mix Design Only)

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Section 39 CHANGESMaterials

• CT371 Pilot
• California Test (CT) 371 ? AASHTO T283-03
• In QC/QA projects for 2 years
• Estimate approx 25 projects / year
• Producer tests mix with CT371
• Chooses treatment choice (TSR ? 70)
• Test HMA at least once during production
• District Translab tests also (FIO)
• Data analysis repeatability, lab / lab,
• mix vs. production

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Section 39 CHANGESConstruction

• Processes
• Standard
• HMA (Type A B)
• RHMA-G
• OGAC RHMA-O
• Method
• Small quantities
• QC/QA - gt10,000 tons
• HMA (Type A B)
• RHMA-G

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Section 39 CHANGES(3 Construction Processes)

• Standard
• Applies to the majority of HMA.
• Contractor QC plan tests at least twice daily
• Compaction (91 97 of Rice)
• State will test and results will be used for
  acceptance and pay

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Section 39 CHANGES(3 Construction Processes)

• Method
• Applies to very small quantities of HMA
• The contractor will not perform QC
• Method compaction with roller and temperature
  requirements
• State will test and results will be used for
  acceptance and pay.
• Default for compaction when layer lt0.15-ft

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Section 39 CHANGES(3 Construction Processes)

• QC/QA
• All HMA quantities greater than 10,000 tons.
• QC tests for each 750 tons of HMA
• State will verify gradation binder
• 1 verification per 5 QC tests
• Statistical evaluation of gradation, binder and
  compaction for pay.
• Verified contractor QC for gradation binder
• Sate cores for compaction (92 96 of Rice)

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Section 39 CHANGESProduction

• Materials Production Quality Program
• HMA PCC (soon)
• Weights and Measures
• Safety
• Limited production unit requirements

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Section 39 CHANGESPlacement

• Lift Thickness gt 3 X NMAS
• e.g. ¾-inch mix 0.20-ft layer and above
• ½-inch mix 0.125-ft layer
• Must comply for compaction
• Contractor may change gradation of mix if ¾ mix
  and 0.15 to 0.20 layer
• Not required for Method
• Thin blanket Maintenance
• Leveling, etc.

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Section 39 CHANGES

• HMA must meet all specification requirements
  throughout production and placement.
• First out of spec Contractor Fix
• Second out of spec Stop, test, show RE before
  starting up
• In-place out-of-spec material
• RE determines status on case-by-case

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Thank you

• Any Questions?