caltrans section 39 specification changes
TRANSCRIPT
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Section 39: 2015
Toni Carroll
Vulcan Materials
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Where did Superpave Go?
New specifications still
Superpave oriented
Now referred to as 2015
Specifications
Current RSS for 2010
specification IS the 2015
specification
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Revised Standard
Specifications Also referred to as “RSS”
Used to update standard specification
Can be found at:
http://dot.ca.gov/hq/esc/oe/constructio
n_standards.html
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Priority of Specifications
1. Special Provisions
2. Applicable RSS
3. Standard Specifications
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QCQA?
Caltrans subtask group began
work on 2/25/15
Reviewed most recent version of
QC/QA specs
Working off of old spec with new
suggestions
Next Meeting 4/17/15 in
Sacramento
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Rubber Usage in California
AB 338
Caltrans needs to use CRM in 35% of
the total HMA placed statewide each
year
2013: 22.9%
2014: Also did not meet
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Rubber Usage in California
Memo issued to Caltrans Districts on 2/10/15
Mandates the use of RHMA-G & RHMA-O as the surface courses of choice for all jobs bidding after April 1, 2015
The exceptions to this rule are as follows:◦ If surface course is <1000 tons
◦ If job is bid as stage construction and each stage is <1000 tons
◦ If road elevations is >3000ft
◦ If ambient temperature <45°F
◦ If used as a concrete pavement asphalt base or bond-breaker
If field blending is not possible, PG-M (terminal blend) can be used
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Change to Dense Mix?
Needs approval by District Director
Documented in job file
Decision forwarded to State Pavement
Engineer
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Rubber Temp Requirements
50°F-54.9°F:◦ MTV Required
◦ Required use of warm mix additive technology (chemical additive, not foaming)
45°F-49.9°F:◦ MTV Required
◦ Required use of warm mix additive technology
◦ Required use of end dump trucks
◦ Required use of intelligent compaction
<45°F:◦ Placement suspended until higher
temperature reached
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Changes to RHMA (10-17-14)
Submit local air district permit for
rubber blending equipment
Tarp trucks if atmospheric temp is
<70°F unless travel time is <30 min
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Changes to RHMA (10-17-14)
Additional QC testing required for
binder
If first 3 lots pass, testing frequency
reduced to once for every 3 lots
Acceptance samples taken once per
day or every 5 lots, whichever is
greater
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Test Turn Around Times
Caltrans issued Construction Policy Bulletin 15-1 on 3/23/15
“Acceptance Sampling & Testing of Job-Produced Materials”
Provides guidance for materials acceptance sampling & testing for job-produced materials.
http://www.dot.ca.gov/hq/construc/manual2001/CPBindex.HTM
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Before Work Begins
Discuss testing at Pre-Con meeting
◦ Identify high priority tests
◦ Shipping of samples
◦ Lines of communication for test results
◦ Timeframes for reporting quality control
and acceptance test results
◦ Any contractual testing dispute resolution
processes.
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During the Course of Work
Sample & Test in accordance with Section 6-107 “Material Acceptance Sampling & Testing” of the Construction Manual
Acceptance samples are to arrive at testing labs within following timeframes:◦ 1 business day if within 50 mi of lab
◦ 2 business days if more than 50 mi from lab
Contractor to be notified of all acceptance test results within 2 business days of receipt from laboratory
Contractor has access to all test results and copies will be provided upon their request
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Aggregate Size
Not located in the Special Provisions
any longer
Determine from Project Plans &
Standard Specifications
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HMA (Dense Mix)
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RHMA-G
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Placement
Required use of MTV for all
rubberized and OGFC
Required use of Nuclear Gage
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QC Nuclear Density Testing
Required to perform QC Nuclear
Gauge Density (CT375) for all non-
minor jobs
3 per 250 tons or 3 per paving day
(whichever is greater)
Not used for acceptance, still using
cores for acceptance
◦ Cores not required if using Method
Compaction
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Verification Changes
Must verify with plant set within 0.2%
of OBC binder content
Only two tries for free, additional tries
are $3000
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Verification Sample Tonnages
120 lb for each Coarse Agg
80 lb for each Fine Agg
10 lb for each Supplemental Fine
Minimum of 50 lb from each RAP stockpile or 100 lb from the belt
Total Agg: >460lbs-630lbs (1/4 Ton!)
HMA: ≥250lbs◦ Likely will need ≈650-1000lbs (1/4-1/2
Ton!)
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Sample Locations QC samples from anywhere per CT125
QA TSR & Hamburg sampled from:
◦ At the plant From Conveyor system
From a windrow laid down at plant
From a silo or batch plant discharge
◦ Automatic sampling device at the truck
◦ Windrow at job site
All other QA HMA samples from:
◦ At the plant From Conveyor system
From a windrow laid down at plant
From a silo or batch plant discharge
◦ Automatic sampling device at the truck
◦ Windrow
◦ Mat behind the paver
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JMF Modifications
Now need new JMF if changing binder source, LAS producer, or LAS dosage
Can do a modification instead of full mix design instead
Only test at OBC
Caltrans verifies Hamburg, Air Voids, VMA, DP, & TSR (if desired)
Each modification costs $2000
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Dispute Resolution
Third party lab used for dispute
resolution must be AMRL accredited.
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Test Method Changes
LP-9 RAP Combined Gradation:
Renamed CT 384
LP-12 WMA Foam:
Renamed CT 386
LP-13 Smoothness:
Renamed CT 387
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Questions?
Comments?