Specification Update
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Transcript of Specification Update
2014 AAPA Conference March 11-12, 2014
Curtis Vincent, P.E.Construction Engineer
Lyndi Davis Blackburn, P.E.Assistant Materials and Tests Engineer
Specification Update
2014 AAPA Conference March 11-12, 2014
General Application Special Provision
• 12-0263(3)– Section 106– Section 410– Section 420– Section 423– Section 424
2014 AAPA Conference March 11-12, 2014
Section 106
• Item 106.09(c)6
• Subarticle 106.09(a)
– Pay Factors will not be applied to mixes where the roadway density requirement has been lowered below 94%.
– Correction of AASHTO Standard Reference from TP 71 to T 344.
2014 AAPA Conference March 11-12, 2014
Section 410
• Article 410.01
• Item 410.02(e)2
Defined Surface Layers
Changed Allowable RAP & RAS usage.
2014 AAPA Conference March 11-12, 2014
Allowable Use of RAP & RASALLOWABLE USE OF RAP AND RAS
Maximum Allowable Percent of RAP and RAS by mass of Total Aggregate Content
Type of Mix Maximum RAP Content # Maximum RAP and RAS Content **
327, Plant Mix Bituminous Base 25 % RAS Not Allowed
327-E, Permeable Asphalt Treated Base 10 % RAS Not Allowed
420, Open Graded Friction Course 10 % RAP shall not contain chert* RAS Not Allowed
423, Stone Matrix Asphalt424, Superpave
Surface Layers: 20 % with no more than 15 % containing chert
*;All Other Layers: 35 %
Surface Layers: 20 % *;All Other Layers: 35 %
* This limitation applies even if the surface layer is to be covered by an Open Graded Friction Course (Section 420). If the aggregate is chert gravel with a bulk specific gravity that is less than 2.550, a maximum of 15 % of the RAP will be allowed. RAP containing chert gravel shall be crushed so that 100 % of the RAP passes the 1/2 inch {12.5 mm} sieve. Additional RAP that does not contain chert gravel may be added to the mixture through a separate feeder. ** RAS shall be limited to 5 % by mass of the total aggregate content.
2014 AAPA Conference March 11-12, 2014
Section 410
• Article 410.01• Item 410.02(e)2
• Item 410.02(e)4
• Previously Item 410.02(e)5
– Defined Surface Layers– Changed Allowable RAP
& RAS usage.
– Added RAS stockpile requirements.
– Deleted Additional Testing Requirements for Recycled/Reclaimed mixes over 25%
2014 AAPA Conference March 11-12, 2014
Section 410 (Continued)
• Subarticle 410.02(f)
• New Item 410.02(f)4
• Added RAS as a fiber stabilizer
• Added Synthetic fibers
2014 AAPA Conference March 11-12, 2014
Slide on RAS and Synthetic Fiber(f) LIQUID ASPHALT BINDER DRAINDOWN.
1. FIBER STABILIZER.A fiber stabilizer is required for some mix
types (Section 420, 423, etc). A fiber stabilizer may be used on other mix types where asphalt binder cement draindown is a problem. Where RAS is included in the JMF, fiber stabilizer shall not be required provided the draindown requirements of 0.30% or less are met when tested in accordance with AASHTO T305 at 325°F {163°C} and 350°F {176°C}.
2014 AAPA Conference March 11-12, 2014
Slide on RAS and Synthetic Fiber
4. SYNTHETIC FIBERS.Synthetic fibers shall include but are not limited
to one or a combination of the following: polyolefins (such as polyethylene and polypropylene) and aramids (such as Kevlar, Twaron and Nomex). Fibers shall be twisted fibrillated, flat fibrillated or monofilament with a maximum fiber length of 0.75 inches {19 mm}
2014 AAPA Conference March 11-12, 2014
Section 410 (Continued)
• Subarticle 410.02(f)
• New Item 410.02(f)4
• Item 410.03(c)3
• Added RAS as a fiber stabilizer
• Added Synthetic fibers
• Added in Density Requirement when the leveling layer meets minimum rate requirements.
2014 AAPA Conference March 11-12, 2014
Item 410.03(c)3. Leveling
Leveling shall be compacted to meet the density requirements given in Article 410.04 if the minimum required placement rate shown on the plans is equal to or greater than the placement rate given in the following table for the maximum size aggregate in the mix. Compaction shall be to the satisfaction of the Engineer if the placement rate shown on the plans is less than the placement rate shown in the following table.
2014 AAPA Conference March 11-12, 2014
Item 410.03(c)3. LevelingDENSITY REQUIREMENTS FOR LEVELING BASED ON AGGREGATE SIZE
AND PLACEMENT RATE*
Maximum Size Aggregate in the Leveling Mix
Specified density is required if the minimum required placement rate shown on the plans
is equal to or greater than:
3/8 inch 80 lb/yd2
1/2 inch 135 lb/yd2
3/4 inch 165 lb/yd2
1 inch 250 lb/yd2
1 1/2 inch 330 lb/yd2
*In-place density pay factors will be applied.
2014 AAPA Conference March 11-12, 2014
Section 420 - OGFC
• Subarticle 420.02(e) • Allows CQS-1hp Asphalt Emulsion with the Spray Paver equipment or“PG Asphalt for Trackless Tack with Conventional Paver equipment.
2014 AAPA Conference March 11-12, 2014
Section 423 & Section 424
• For Any Mixes Containing RAS
• Minimum Liquid Asphalt Binder is increased by 0.2
• Air Voids will be designed on 3.5%.
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Other Stuff
Every Day CountsIntelligent Compaction – at least two
pilot projects.
Inertial Profiler – Smoothness TestingHave 3 pilot projects underway.
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Asphalt Pavement
• Specifications Detailed Technical Lengthy Complicated
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Asphalt Pavement
• Common Sense Right vs. Wrong
• Workmanship Pleasing to the eye Looks bad ----- Is Bad
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Process
Inspection
Workers
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Industry Impacts
• ATRIP = $1,000,000,000 Program Approximately 1100 projects received some amount of funding Approximately 750 of those are system preservation/ roadway improvements
• Annual resurfacing program = $250,000,000• Large portion of remaining budget is roadway related
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality
• The Obvious
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Construction Quality?
2014 AAPA Conference March 11-12, 2014
Questions?