1. Caltrans Changes SECTION 39 “Hot 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)

3. 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

4. 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

5. 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

6. Section 39 – CHANGES Mix 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

7. Section 39 – CHANGES Materials
Aggregate Qualities
Gradation (TV ± Tolerance)
LA Rattler
Sand equivalent
% Crushed Particles (2-face – New)
Fine Aggregate Angularity (New)
Flat & Elongated (New)

8. Section 39 – CHANGES Materials
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)

9. Section 39 – CHANGES Materials
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

10. Section 39 – CHANGES Construction
Processes –
Standard
HMA (Type A & B)
RHMA-G
OGAC & RHMA-O
Method
Small quantities
QC/QA - >10,000 tons

11. 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

12. 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 <0.15-ft

13. 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)

14. Section 39 – CHANGES Production
Materials Production Quality Program –
HMA & PCC (soon)
Weights and Measures
Safety
Limited production unit requirements

15. Section 39 – CHANGES Placement
Lift Thickness > 3 X NMAS
e.g. ¾-inch mix = 0.20-ft layer and above
½-inch mix = 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.

16. 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

17. Thank you
Any Questions?