PAPA Regional Meetings
2013
Meetings with PAPA in 2012:
– January
•Remove and Replace Defective Material
– May
•Table “H” instituted after PAPA meeting
– June and August
•Specification change discussions
– November
•Meeting with Dr. James Burati
– January 2013 – NEW SPECIFICATION
Annual HMA Placement
2012 HMA Summary
• Number of Projects – 33
• Total Lots - 1178
– Passing – 1077 (91 %)
– Failures - 101 (9 %)
• Total JMF’s – 76
• Number of Plants - 24
2012 HMA Summary
• LOT Failures – 101
– AC Low –17
– AC High –13
– Voids Low –39
– Voids High – 37
– #200 Low – 3
– #200 High - 5
2012 HMA Summary
• Loose Box Samples Tested – 100
– Passing – 71 / Failed – 29
•AC Low – 0
•AC High – 3
•Voids Low – 20
•Voids High – 5
•#200 Low – 0
•#200 High - 2
2012 HMA Summary
• 12.5 mm – (451) Lots / 37 Failed
– AC Low – 5
– AC High – 8
– Voids Low – 15
– Voids High – 12
– # 200 Low – 1
– #200 High - 2
2012 HMA Summary
• 19 mm – (422) Lots / 38 Failed
– AC Low – 8
– AC High – 4
– Voids Low – 13
– Voids High – 15
– # 200 Low – 0
– #200 High - 0
2012 HMA Summary
• 9.5 mm – (164) Lots / 22 Failed
– AC Low – 2
– AC High – 0
– Voids Low – 10
– Voids High – 9
– # 200 Low – 2
– #200 High - 3
2012 HMA Summary
• 25 mm – (141) Lots / 4 Failed
– AC Low – 2
– AC High – 1
– Voids Low – 1
– Voids High – 1
– # 200 Low – 0
– #200 High - 0
2013 – Specification Changes
• Release Material to Plant Operator or
Lab Technician
• Eliminated #8 Sieve for Acceptance
• 6” x 4 ¼” x 9” Box Sample Size
• Provide Storage Shed / Field Samples
• Core Density Shall not Exceed 97%
2013 - Specification Changes
• Eliminated 19mm binder with 76-22
• Increased Wearing RAP to 15%
• Eliminated F.A. “E” or “H” Requirement
• Target Gmb Plugs at 115mm (+/-)1.0mm
• Rich Bottom Voids – Design at 4.0%
– Additional AC to achieve 2.5% Voids
• If Plant or Box Samples Fail for 3
Consecutive Days / Review JMF
2013
• HMA - Back to Basics:
– Plant and Field Sampling (PTM 746)
– T-209 , T-312 , T-166
• Equipment
– 8” / 12” sieves
•AASHTO T-30 – Max of 200g on each
sieve smaller than the No. 4
AASHTO T-209
• Removed air trapped in the sample under pressure (27.5 ±2.5 mm Hg)
and maintain for 15±2 min
• Measure water temp and IF
different from (77 ±2°F) use
adjustment in Section 8.1
AASHTO – T-312
• Place compaction Mold and Base
Plate in an oven at the required
compaction temp. for a minimum of
30 mins. prior to the estimated
beginning of compaction.
• Place the mixture in the mold in one
lift.
• Before reusing the Mold, place it in
the oven for at least 5 mins.
PTM 715 / AASHTO T-166
• T-166 (Method A)
– Immerse individual specimen for
4±1min.and record the immersed mass
– Remove specimen from the bath,
damp-dry specimen by blotting with
damp towel as quickly as possible (not
to exceed 5 s) and determine surfacedry mass
PTM -746 (Hauling unit)
• EQUIPMENT:
– A flat bottom, high sided scoop
– Putty knife for scraping the INSIDE
of the scoop
• Starting low on the pile and extending
upward, sample the mixture by
creating an approximate 2’ long and
3” to 4” deep vertical furrow.
PTM -746 (Hauling unit con’t)
If the mixture is sampled from at least
two places in the truck, place the
material removed in this manner on a
mixing board, thoroughly mix, Form into
a flat pile and quarter to provide a
representative sample of the required
size. Scrape the INSIDE of the scoop at
each transfer point to incorporate any
fines sticking to the inside of the scoop.
AASHTO R-47
Reducing Samples of HMA to Testing Size
Mechanical Splitter for use in quartering HMA
samples.
HMA Issues on Data Input
• Wrong #200 C/F used when calculating
gradation. When corrected – several
gradations were out of Spec.
• Gradation on lower screen showed more
material passing than previous screen
• Incorrect tolerance band used for
gradations – correct band showed Six
sieves with Deviations
HMA Issues on Data Input
• Volumeter calibration changed Dry
weight by 900g however the Volume
remained the same?
• Gmb plugs indicated the Dry specimen
weight was heavier than the SSD
resulting in negative absorption – if
you reverse the weights the Va failed
• Dry and SSD weights were exactly the
same – no absorption? Field cores too!
HMA Issues on Data Input
• Wrong Gmm used for density cores
– 2.435 was used for 95.4% density.
– Actual was 2.534 for 91.7% (Failure)
• 2 Gmb plugs had same weight
– 1 plug absorbed 7g
– 1 plug absorbed 23g
– SAME Va % ???
HMA Issues on Data Input
• Gmb plug heights outside of the
110mm-120mm range yet still showed
passing Va%
• Gmb plugs always had 5g – 6g H2O
absorption- no matter the plug weight
or height variances
PTC Materials Data Library
E-DEL (Electronic-Data Entry Log)
Bituminous –Data Entry Log
(Bit – DEL)
Concrete – Data Entry Log
(Con-DEL)
Aggregate – Data Entry Log
(Agg-DEL)
2014
• PAPA website:
– BIT DEL program
– HMA Design Software for 2013 Designs
• Materials Lab in Somerset : APPROVED
– JMF approval
•Producer to Provide
Aggregate/Oil/Design Data
•PTC Materials to Proof Design
– Database for Future Designs
PTC Materials Staff
• East:(300-358 & A-20 – A-130)
• Steve Havrilla – shavrill@paturnpike.com
• Central – (189-300)
• Brian Wible –bwible@paturnpike.com
• West – (0-189)
– Chris Forry- cforry@paturnpike.com
Our Company is Built on People
– those who Work for Us and
those We do Business with.
Harvey S. Firestone
THANK YOU !
tdreher@paturnpike.com