1. ALDOT Specification Updates
Scott George, P. E.
Materials and Tests Engineer
2017 AAPA Conference
Birmingham, AL
March 23, 2017

2. ALDOT Procedure 372 RAP & RAS Stockpiles
Stockpiles that have been inactive for at least a year shall be processed as a separate operation (i.e. not through an inline crusher) and processed in accordance with the requirements given in Section 5 and tested in accordance with Section 6 prior to incorporation in an asphalt mix design.
All RAP and RAS used on State projects must be processed. The processing may take place immediately prior to incorporation into the mix (i.e. between the cold feed bin and the drum). The contractor shall ensure the stockpile is easily workable and without pieces greater than 2”.
Significant re-write.
Changes to stockpile processing and testing

3. ALDOT Procedure 372 RAP & RAS Stockpiles
Blended RAP and RAS stockpiles shall be processed as follows :
Materials shall be mechanically proportioned when combined into single feed stockpiles. Combination ratios shall be determined and controlled based on weight and mix type (i.e. wearing surface or binder).
Electronic belt weighing devices shall be used to determine RAP and RAS weights and to monitor the flow rates to ensure the desired ratios are maintained.
Ground blending of RAS is not acceptable.
Fractionated stockpiles shall be processed as a separate operation
Testing language
Asphalt binder content testing, -No. 200 & largest sieve with 50% passing standard deviation language added
RAP or Blended RAP/RAS stockpiles 10 samples first 10,000 T and one sample every 5000 T added
RAS stockpiles 10 samples first 5000 T and one sample every 1000 T added

4. GFO 6-12 Profiler Pay Items NCAT Certifications
Profiler Update
GFO 6-12 Profiler Pay Items NCAT Certifications

5. GFO 6-12
Smoothness requirements utilizing the inertial profiler shall be included for pay purposes in contracts meeting the following criteria:
On new construction projects,
On resurfacing projects, where a minimum asphalt plant mix build-up of a wearing surface layer and a binder layer of uniform thickness is specified.

6. GFO 6-12 Exceptions to the above include the following:
Projects one mile or less in length,
Bridge projects with less than a ½ mile of roadway on each side of bridge, and
Projects with roads exhibiting poor geometric characteristics (e. g. numerous horizontal and/or vertical curves, large degrees of curvature, or numerous intersecting side streets).
Smoothness requirements utilizing the inertial profiler shall be included for data collection purposes in contracts for resurfacing projects greater than one mile in length.

7. Profiler Pay Items
410‑I Smoothness Testing – Certified Inertial Profiler
410-J Smoothness Data Collection –
Certified Inertial Profiler
Existing Roadway Surface
Data Collection Required
Open Graded Friction Course Layer
Data Collection Required & Pay Factors Apply
Wearing Surface Layer
Upper Binder Layer
I used for Pay
J used for research
Have hit a snag with the research project at AU. Shortage of research money. May have an alternate way to pay for the project with pavement parameters overhead.

8. Profiler Specification
TABLE I
International Roughness Index Inches/Mile/Section {meters/Kilometer/Section}
Contract Price Adjustment Percent of Pavement Unit Bid Price
Under 40
{Under 0.6}
105 – (IRI / 8)
{105 – (IRI / 0.12)}
40 to less than 65
{0.6 to less than 1.0}
100
65 thru 120
{1.0 thru 2.0}
100 – [(IRI – 65)/2.75]
{100 – [(IRI – 1.0)/0.05]}
Over 120 {Over 2.0}
Unacceptable
A number of companies have been to the NCAT Test Track to get profilers certified
Different manufacturers' and models
AMES 8200
AMES 8300
SSI CS9300SL
SSI CS9100
SSI CS9500
Pathway Pathrunner LG3D
ICC MDR 4085
Dynatest MK IV

9. Questions