Section 39: 2015

Toni Carroll

Vulcan Materials

Where did Superpave Go?

New specifications still

Superpave oriented

Now referred to as 2015

Specifications

Current RSS for 2010

specification IS the 2015

specification

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

Priority of Specifications

1. Special Provisions

2. Applicable RSS

3. Standard Specifications

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

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

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

Change to Dense Mix?

Needs approval by District Director

Documented in job file

Decision forwarded to State Pavement

Engineer

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

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

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

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

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.

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

Aggregate Size

Not located in the Special Provisions

any longer

Determine from Project Plans &

Standard Specifications

HMA (Dense Mix)

RHMA-G

Placement

Required use of MTV for all

rubberized and OGFC

Required use of Nuclear Gage

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

Verification Changes

Must verify with plant set within 0.2%

of OBC binder content

Only two tries for free, additional tries

are $3000

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!)

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

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

Dispute Resolution

Third party lab used for dispute

resolution must be AMRL accredited.

Test Method Changes

LP-9 RAP Combined Gradation:

Renamed CT 384

LP-12 WMA Foam:

Renamed CT 386

LP-13 Smoothness:

Renamed CT 387

Questions?

Comments?