JOHN F. KENNEDY“It’s not the wealth of a nation that builds roads,but the roads that build the wealth of a nation”
Today’s “Tax Payer Friendly” Topics Asphalt Recycling and Climate Reduction Engineered Approach, Mix Design Cold In-place Recycling (CIR) Cold Central Plant Recycling (CCPR) Hot In-place Recycling (HIR) Other Sustainable Solutions With RAP Summery and Questions
Our Nations Roadways Federal Roadways = 3% State Roadways = 20% Local Roadways = 77%Two Thirds are Paved (One Third Unpaved)94% of Paved Roads have an asphalt surface
FHWA Policy Since 2002 Recycled/Reuse materials are viable resources Recycled materials should get first consideration Consider use of recycled materials early inplanning/design process Restricting the use of materials should betechnically based Material should not adversely impact theenvironment and should perform as intended
Recycling Asphalt Asphalt is the # 1 recycled product in the world yet,only three percent of our roads are recycled in-place. It is proven that in-place recycling can save up to 50%in costs and reduce construction time. CIR, CCPR and HIR are recognized pavementpreservation techniques and are tried and proven. Nevada Department of Transportation (NDOT) hassaved over 600 million utilizing in-place recycling. In 2013 Green book and Caltrans up the RAP percentfor HMA to 20%. In 2014 the percent of RAP will go upto 25%.
SB-375 and AB-32 Requires Green House Reductions back to thelevels of 1990 by the year 2020 The Air Resource Board “cap-and-trade”program includes an enforceable emissions cap.The State will distribute allowances, which aretradable permits, equal to the emissions allowedunder the cap. Sources under the cap will needto surrender allowances and offsets equal totheir emissions at the end of each complianceperiod. The use of low green house gas technology canbe used to off set their emissions.
Recycling In-Place Saves MaterialResources, Money and Energy Re-using existing asset’sinstead of replacing ordiscarding Reduces import-exportfrom 83 truckloads(mill and fill) to two Fewer emissions, lesstraffic,small carbon footprint Structural value and longlife: resists reflective andthermal crackingRecycling is “Green”
Each lane mile of roadway on whichCIR is used instead of traditional HotMix Asphalt saves approximately130,704 lbs of Green House Gasemissions, which is equivalent totaking 11 cars off the road for oneyear.Asphalt Recycling Such as Cold In-placeRecycling for Climate Reductions
When to UtilizeAsphalt Recycling Anywhere mill and fill isconsidered Adequate existing pavementthickness 2 to 4 inches in thickness. Thick enough to take to stable base orleave 1” of existing pavement over nativesoils. Will handle all cracking distressprovided not sub-grade or baserelated Where surface maintenance is nolonger effective Where safety is a concern When life cycle costs dictate When you need to stretch yourbudget
Where to Utilize AsphaltRecycling?City StreetsAirportsVirtually No TrafficLimitationsHighways
Fatigue CrackingThermal CrackingDry, RaveledPatchedPoor RideabilityType’s of Asphalt to Recycle
Engineered Approach, Mix DesignOn all Recycling Projects Prior to bidding the project. Check existing pavement for adequate thickness Check for stable subgrade Check for fabric and pavement type. Part of the contract is to core pavement to obtain samples formix design using a systematic engineered system. Optimizes the percentage and type of engineered recyclingagent unless agency specifies asphalt foam. For asphalt foamthe optimum percent asphalt is determined in a mix design Determine the need for, percentage of and type of recyclingadditive at the mix design.
Mix Design Process Defined sampling procedure, cores takenfrom various locations. Core samples sentto independent AASHTO approved lab.
Lab RAP Analysis Lab Field cores crushed tospecific gradation bands A design made for 2 of thegradations Field Field gradationdepends uponmultitude of factors:milling, weather, etc. Gradation comparedto lab tested band Recycling agentpercentage based onapplicable gradation-102030405060708090100Sieve Sizes%PassingRAP-medium gradationRAP- fine gradation1 in.3/8 in.No. 30RAP - coarse gradation
FieldDensity Compaction EffortSuperpave Gyratory Compactor or MarshalCompactorLab
Cold In-place Recycling (CIR)Distressed Pavement = New Pavement Using ATrain of Equipment that: Mills deteriorated pavement Reclaimed asphalt pavement (RAP) Crushes RAP to gradation Mixes with recycling agent Re-Paves recycled mix Compacts to specified density Readies for surface treatment Small carbon footprintBlythe Airport
Cold In-place Recycling (CIR)Preservation or Minor Rehabilitation6” Stable BaseNative Soil4” Distressed ACRecycled AC>1”Recycle AC to:• Stable Base•Within 1” of lessSupportive Material
Asphalt Recycling TrainFull Lane MillRecycling UnitRecycling Additive
100% Closed Circuit System.Crushing and sizingequipment capable ofreducing RAP to the100% passing 1-inchsieve prior to mixingand weighing millingswith engineeredrecycling agent.
Pick Up and InstallationCaltrans State Route 33Recycled Asphalt Surface
Los Angeles CountyAngeles Forest Highway Winner2012 Road & Bridges MagazineNational Award for CIR
City of Beverly Hills2010 CIR Project of the yearRoads & BridgesMagazine
to PavementCold Central Plant Recycling (CCPR)From RAPClean Rap = New Pavement: Stockpiled and kept clean Crushed RAP to gradation Mixed with engineered emulsion orfoamed asphalt In a central plant Transported to lay down area Paved as a recycled mix Compacted to specified density Readied for surface treatment
“Urban Quarries”Recycle Sustainable Assets on Site!“Urban Quarries”Recycle Asphalt Assets on Site!Value Engineered
Project Profile; 500,000 Square Feet“Energy and Cost Savings” 8,744 tons of asphalt removed and repaved. 840 fewer trucks used utilizing CIR,compared to a mill and fill operation. 1,649 fewer barrels of oil used. 79.6% fewer carbon emissions utilizing CIRcompared to mill and fill operation. Cost savings to the City $262,320.00. Cut 30% off the project schedule.
Nevada Department ofTransportation (NDOT) Cold In-place Recycled (CIR) over 1800miles of roadways. Most projects are on state highways. Utilized CIR for over 25 years NDOT has re-recycled over 75 miles ofroadways that got over 22 years ofperformance CIR is sustainable pavement development
Specified CIR and CCPR Federal Highway Administration Federal Aviation Administration National Park Service Arizona Dept. of Transportation California Dept. of Transportation Nevada Dept. of Transportation County of Contra Costa County of Los Angeles County of Riverside County of San Diego County of San Bernardino County of San Luis Obispo County of Sonoma City of Agoura Hills City of Anaheim City of Atascadero City of Beverly Hills City of California City City of Chino City of Hanford City of Highland City of Lancaster City of Modesto City of Lemon Grove City of Moreno Valley City of Palm Desert City of Porterville City of Monterey City of Napa City of Rancho Mirage City of Sacramento City of Santa Ana City of San Diego City of San Jacinto City of South San Francisco City of Shafter City of Susanville County of Tulare City of Vernon
Hot In-Place Recycling – Preservationor Minor RehabilitationDistressed Pavement = New PavementUsing A Train of Equipment that: Heats RAP and Existing Binder Scarifies and/or Mills deteriorated pavement Adds Aggregate or Virgin Hot Mix AC Mixes with rejuvenating agent Re-Paves recycled mix Compacts to specified densityNot Used Much In CA
HeaterScarifierHIR – Surface Recycling 0.5 to 1”
Sustainable Solutions With RAP Process Reclaimed Asphalt Pavement (RAP) RAP Chips for Chip seals, Cape seals RAP Slurry Type II (stays black longer) RAP Micro Surface (fast cure time, night work) Renew Asphalt (Cold Central Plant Recycling) Cold Mix Dust Control Shoulder Backing Base (Caltrans Route 46) Processed in Place,Met Class II Gradation Requirements.
Caltrans District 8 RAP ProductsCaltrans Interstate 10 near Desert Center
RAP Slurry compared to Conventional, City of La Mirada,California. Side by Side – One Year later, RAP is still black!RAP Slurry Conventional Slurry
Summary - Benefits of Recycling andReclamation Shorter Construction Periods with Reduction in User Delays Improved Pavement and Structural Section Properties Mitigates Reflective Cracking 20 Plus Years Performance Expectations Cost Savings Over Traditional Rehabilitation Methods Sustainable Development “.... Development that meets the needs of thepresent without compromising the ability of future generations to meet theirown needs.” Reduces the consumption of natural resources Reduce energy consumption Reduces truck traffic Reduce greenhouse gas emissions, pollution
Questions?Contact Information:James W. Emerson, APMPavement Recycling Systems Inc.(951) 232-6881JEmerson@pavementrecycling.com