Using Zydex Nanotechnology Presentation to ASHGHAL, Qatar Public - - PowerPoint PPT Presentation

Building Water Resistant Durable Pavements Using Zydex Nanotechnology

By Vishal Saluja – Vice President , Zydex Industries

Presentation to ASHGHAL, Qatar Public Works Authority

Oxidation

• Binder loss leading to

raveling

• Loosening of the mix

leading to surface cracking

• Increased Surface

Roughness

Moisture

• Stripping of the

aggregates and bitumen

• Inefficient compaction

Cracking

• Potholes and undulations
• High thermal cracking

due to temp variations

• Premature pavement

failures

• Increased maintenance

costs

Bleed

• Tracking
• Pitting out/Pulling up

chunks of pavements

• Slipperiness

Failures/Issues most common in roads and highways

Common Factor here is Water/Moisture Ingress

3

Ho How is is t the he Pavem emen ent t wea eaken ened ed by in ingres ess s of

• f wat

ater er

Water Intrusion through Soil

Water Intrusion through Soil

Water Intrusion through Soil

Water Intrusion through Soil

Water Intrusion through Soil

Water Intrusion through Soil

10 10

Dam amag age e due e to to free eeze ze tha haw

Damag age e due e to freeze ze thaw

Damag age e due e to freeze ze thaw

Damag age e due e to freeze ze thaw

Damag age e due e to freeze ze thaw

Damag age e due e to freeze ze thaw

• High performing mix to meet current needs
• Technology that works under different climatic zones
• User friendly technology
• Permanent solution to the problem
• Cost effective solution
• Tested and approved

ANSWER IS ZYDEX ROAD SOLUTION  Currently being used in 65 + countries worldwide  Tested, approved and accepted globally  Received several awards globally under technology & Innovation

What is the solution to these issues

3C 3C NANO ANOTECHNO TECHNOLOGY OGY

CHEMICA CHEMICAL L BOND BONDING ING CONSIST CONSISTENT ENT COMP COMPACTION CTION COMPL COMPLETE ETE CO COATING TING

• Chemical bonding is far superior to the physical bonding of bitumen

and aggregate

• Bitumen bonded chemically to aggregate will ensure that stripping

and oxidation of bitumen is eliminated

• Extended time & temperature of moisture conditioning parameter,

shows excellent retention of wet strength due to chemical bonding

• Zycotherm mixes comply to AASHTO T 283 / ASTM tests (to

simulate ageing of actual production of mixes)

CHEMICAL BONDING

THE THE CH CHEMICA EMICAL L ACTIO CTION

Aggregate / Soil / Clay / Sand surface silicate structure after ZycoTherm reaction

O S i O S i O S i O S i O S i O S i O S i O O S i O O O O S i O O O S i O O O S i O O O O O O O S i O O O S i O O O S i O O S i S i S i S i S i S i S i O O O O O O O O O O O O O O S i O S i O S i O S i O S i O S i O S i O O S i O O H O H O S i O O S i O O H O S i O O O O O O O S i O O H O S i O O H O S i O O H O H

Particle surface

• OH groups make surface very hydrophilic (water loving)

Particle surface

Internal Siloxane bonds

Aggregate / Soil / Clay / Sand surface silicate structure Silanol Groups ZycoTherm creates molecular level hydrophobic zone (water repellent)

4 - 6 nm

Alkyl Siloxane surface

CHEMICAL BONDING

Basalt Granite Limestone

Aggregate Surface with ZycoTherm Nano Layer

Weak Physical Bonding Strong Chemical Bonding

Polar Asphaltenes (5- 15%)

BITUM BITUMEN BIND EN BINDER ER MIC MICROSTR OSTRUC UCTURE TURE

In Non-Polar Maltenes (85-95%)

dispersed

Polar - Polar Interaction 5-15 % Asphalt participates in Bonding Non Polar – Non Polar Interaction 85-95 % Asphalt participates in Bonding

ZY ZYCO COTHERM THERM – AGG GGREGA REGATE TE - BIN BINDER DER IN INTE TERA RACTIO CTION

ORANGE PEEL EFFECT APPLE SKIN EFFECT

Stripped Binder Clean Water

Aggregate

Faster Coating & Consistent Compaction  Better workability, Pave at 0o Celsius, Higher RAP

BOIL TEST ASTM D3625 : EXTEND TO 6 HOURS

Basalt Aggregate (DBM) : 45% 20 mm, 10% 10 mm, 45% less than 6 mm with stone dust Asphalt Grade: AC-20 (VG-30, 60-70 penetration grade)

10 20 30 40 50 60 70 80 90 100 Control 2% Hydrated Lime 0.5% Amine 0.1% ZycoTherm

10 min 30 min 1 hr 6 hrs

% Coated Aggregates

PG 64-22 / VG 30 / 60-70 Pen PG 76-22

SALT RESISTANT PAVEMENTS

10 20 30 40 50 60 70 80 90 100 PMB Control 165 C PMB + 0.1% ZycoTherm 135 C 10 Min 1 Hr 6 Hr 10 20 30 40 50 60 70 80 90 100 Control 135 C Control 120 C 1% Hydrated Lime 135 C 0.5% Amine 135 C 0.1% ZycoTherm 120 C 10 Min 1 Hr 6 Hr

BOIL TEST ASTM D3625 : EXTEND TO 6 HOURS

Basalt Aggregate (DBM) : 45% 20 mm, 10% 10 mm, 45% less than 6 mm with stone dust Asphalt Grade: AC-20 (VG-30, 60-70 penetration grade)

25 25

Boil Test Retained Coating 98 % of ZT mix v/s control 65 %

Test 30 minutes as per IS 14982 Mix made with VG 30 Bitumen Granite Aggregates Control Treated

EFFECT OF ZYCOTHERM ON BITUMEN BINDER

Bitumen Parameter Outcome Performance Grading It maintains the grading Viscosity AASHTO T316 at 135 0C Rotational Viscosity remains unchanged Rutting Improves Rut Resistance (higher G*/Sinδ) Aging Improves retention of elasticity reflected by higher phase angle (in PAV aged asphalt binder) Low Temperature Flexibility (BBR Test AASHTO T 313) Similar / Higher m value at -12 0C, even though the G* shows consistently higher values at 64 0C Stiffness Penetration number goes down showing increase stiffness of the binder

ST STATIC TIC IM IMMER MERSIO SION N AASHTO T182 TEST TEST : : EXTEND EXTEND T TO O 360 360 HR HRS S

Basalt Aggregate (DBM) : 45% 20 mm, 10% 10 mm, 45% less than 6 mm with stone dust Asphalt Grade: AC-20 (VG-30, 60-70 pen. Grade)

10 20 30 40 50 60 70 80 90 100 Control 2% Lime 0.5% Amine 0.1% Zycosoil

24 Hours 48 Hours 120 Hours 360 Hours

0.1 % ZycoTherm

% Coated Aggregates

MARSHALL WET COMPRESSIVE STRENGTH AASHTO T165 / ASTM D1075

500 1000 1500 2000 2500 3000 Binder AC-10 Binder AC-20 CRMB-1 PMB-40

Control 2% Hydrated Lime 0.1% Zycosoil

2.85 2.70 3.02 2.71 3.14 3.09 2.95 2.78 3.18 3.10 3.00

Marshall Stability (Kg)

3.05 Flow Values (mm)

Basalt Aggregate (DBM) : 45% 20 mm, 10% 10 mm, 45% less than 6 mm with stone dust Asphalt Grade: AC-20 (VG-30, 60-70 pen. Grade)

2% Hydrated Lime 0.1% ZycoTherm Control

COMPLETE COATING

COMPLETE COATING

• Eliminates air interface at the aggregate surface due to faster

coating, wetting and saturation of finest pores & crevices on aggregates / fines with bitumen

AGEING EFFECT ?

Bitumen Binder Control With ZycoTherm Air Interface Pinhole Free Surface, Jet black look

• Reduces Oxidative effect at the aggregate – bitumen interface

to ensure longer life Accelerated bitumen oxidation happens due to extra air interface created by poor saturation and de-bonding of bitumen film on account of wet & dry cycles during the pavement service life

RESISTANCE TO OXIDATION RESISTANCE TO FATIGUE

• Extends Pavement Fatigue Life because of improved stress

transfer due to complete mechanical impregnation of bitumen into the finest pores of aggregate surface

• ZycoTherm modified bitumen leads to faster coating and easier mixing with

less Torque to saturate the rough and porous aggregates.

• Ensures improved mechanical interlocking of bitumen at the aggregate

interface for improved fatigue performance

• Improves the heat transfer to RAP and mixing of virgin binder with oxidized

hardened RAP binder

• Eliminates entrapped air between bitumen binder and aggregates and

gives the Jet Black look

• Rate of Oxidation of bitumen binder is reduced due to elimination of air at

the aggregate surface

EFFICIENT WETTING

• Faster wetting and 100 % dispersion of fines below 75 microns ensures

efficient distribution of bitumen binder in HMA mixes. This results in lesser requirement of bitumen by 0.1 – 0.4%

• Poor saturation of porous aggregates is a major cause of pre-mature

failures due to moisture susceptibility and oxidation. ZycoTherm modified mixes show distinct improvement in performance, though the OBC may go up marginally

OPTIMUM BINDER CONTENT

Cumulative Effect Of The Above

Aggregate OBC

Low Absorption Lowers Medium Absorption Maintains High Absorption Increases

Colorado, USA

JE JET T BLA BLACK CK LOO OOK K

Comp Complete lete Sa Satu turation tion

CONSISTENT COMPACTION

Lowers Mixing Temperature by 10-15 0C  Cooler Hot Mixes Lowers Compaction Temperature by 35-40 0C  Warm Mix Benefit Eliminates Variability of Compaction Density  Upto 90 – 100 0C Texas Experience ZycoTherm HMA mixes (unmodified bitumen) delivered to job sites at 145 0C (in front of the plant site) and 105 0C (hauling for 4 hours & paving on ranch), have been rolled successfully achieving specified compaction density

CONSISTENT COMPACTION

COMPACTION EFFICIENCY

38 38

Consistent Compaction at Lower Temperature

Mexican Transportation Institute Greater compaction can be achieved for the same and lower temperatures than reference mix Mixes often cool down unexpectedly, due to drop in ambient temperature, high wind speeds or a sudden rain shower. This leads to inconsistent densities during paving

• perations.

Compaction temperatures for unmodified PG 58-22 in the range of 131-136 0C in Nova Scotia, AMEC Americas Ltd

Compaction density is consistent from 135 - 950 C  Eliminates Variability

39 39

Bitumen Mixes Compaction Resistance at Lower Temperatures

Innovationsgesellschaf t Technische Universität Braunschweig mbH

Mix Type Binde r Type C / ZT Compacti

• n Temp

OC

50 % Coating Sec Compaction Resistance 21Nm Void Content Vol % AC 16 BS 50/70 C 135 25 41.6 7.0 ZT 135 15 43.5 7.1 115 19 42.8 7.2 95 19 41.3 6.9 AC 11 DS 25/55

• 55 A

C 145 37 37.3 4.3 ZT 145 22 34.2 4.6 125 30 36.5 5.0 105 30 36.5 5.3

Mixes often cool down unexpectedly, due to drop in ambient temperature, high wind speeds or a sudden rain

• shower. This leads

to inconsistent densities during paving operations. Often, this either attracts penalty or bonus is missed due to inconsistent densities.

40 40

Deformation maintained with acceptable tolerance, for similar temperatures as reference mix, according to AMAAC specifications Lowering mixing & compaction temperature does not affect rutting behavior

Rutting Test

42 42

Higher Number of Cycles means Higher Fatigue Life Reduction in cracking in surface layers – field experience Saturation of micro pores and complete coating

• f fines leads to

higher bitumen- aggregate interface area leading to better load transfer Reduced stress for the mix

Flexural Fatigue Test AASHTO T321-07

43 43

Flexural Fatigue Test AASHTO T321-07

Beam µԑ Reference Beam Nf ZycoTherm Beam Nf Fatigue life Increment

1 300 3,995,009 5,480,003 37% 2 400 713,381 1,300,000 82% 3 500 224,321 380,010 69% 4 600 67,758 190,010 180%

44 44

Flexural Fatigue Test AASHTO T321-07

Number of cycles in which the beam stiffness modulus decreases 50% compared to its initial value.

RUT RESISTANCE

PLASTIC DEFORMATION (RUTTING)

ZYCOTHERM & RUT RESISTANCE

• At 0,075% ZT, deformation maintained with acceptable

tolerance, for similar temperatures as the reference mix, according to AMAAC specifications

• Lowering mixing temp. and compaction temp. does not

affect rutting behavior.

ZYCOTHERM & RUT RESISTANCE

MOIS ISTURE TURE SUSCEPTIBILIT EPTIBILITY Y – WET T WHEEL L TE TEST T AASHTO T 3 T 324

Moistur ure e sensitive ive Dolom

• mit

ite e Aggr gregat egate Ke Keystone ne Quarry under er wet cond ndit ition ion at 50 oC

Measure Control ZycoTherm modified SIP 4600 11000 Rut Depth 10 mm Utah DOT 9300 14300

49 49

Deformation maintained with acceptable tolerance, for similar temperatures as reference mix, according to AMAAC specifications Lowering mixing & compaction temperature does not affect rutting behavior

Rutting Test

MANUF MANUFACTUR CTURING ING AD ADVANT ANTAGES GES

• Odor Free: Zycotherm modified bitumen mixes

exhibit low odor, making paving crew comfortable

• Cleaner Tanks: Zycotherm added in bitumen binder

eliminates buildup as well tend to clean old build-up

• Lesser heating: Results in reduction of heating time

to half due to cleaner coils

• Cleaner Equipment's & flights: Reduced stickiness to

the metal helps to maintain cleaner elevators and

• buckets. It helps to maintain consistency in

gradation and eliminates periodic cleaning required

• Paving season extended: Zycotherm allows paving in

sub-zero (-50 C) temperature, or in cold windy conditions since it gives extended workability up to 90 0 C for unmodified bitumen & 1050 C for SBS binder

• Health Rating ZycoTherm 1

( for Amine 3)

• REACH Registered
• TSCA Registered
• Odor reduction due to less volatiles
• Non corrosive to equipment &

machinery

• Low temp at production and paving

– lesser emissions

• Low carbon footprint

KEY HEALTH AND ENVIRONMENTAL BENEFITS

Zycotherm is a safer product compared to typical products used for antistrip or warm mix purposes Approximate pH ZycoTherm- 7 Amines- 11 Lime- 12 NFPA Health Rating ZycoTherm- 1 Amines- 3 Lime- 3

DOSAGE

Asphalt Binder ZycoTherm Dosage (% by weight of asphalt binder) Unmodified 0.1 PMB (SBS Polymer - below 3%) 0.125 PMB (SBS Polymer - above 3%) 0.15 CRMB (Rubber 12-15%) 0.15 RAP / RAS 0.15 – 0.20

54 54

Dosing Zycotherm in Bitumen Binder

Co-inject / Pour ZycoTherm with bitumen binder before loading tanker in refinery or in storage tank under re-circulation, while unloading tanker at HMA plant storage tank Co-inject ZycoTherm EZ with bitumen binder prior to mixing with aggregates for a particular batch being made in batch or drum plant

• Much better resistance to thermal cracking
• Better resistance to permanent deformation (rutting)
• Reduced Odor of the mix compared to CRMB mix
• Fuel saving due to lower mixing temperature (10 - 150 C)
• Much Improved Compaction
• Enables increase of crumbs % in the bitumen binder
• Higher moisture resistance at par with PMB ( ~ 10 – 15%)
• Increased resistance to crack propagation

ADVANTAGES OF CRMB WITH ZYCOTHERM

ZYCOTHERM & RAP

There are certain limitations of RAP addition. The challenge with use of RAP is melting and recovery of used asphalt in the limited time available for mixing. As a result, it is very difficult to achieve complete coating and to ensure that the final mix is homogeneous and workable. Usually, RAP is cold and moist which calls for mixing temperature to be raised, but the temperature cannot raised beyond a limit, as : It will cause blue smoke Higher temp expedites aging of binders – both virgin and RAP binder End re resul sult: : Incomplete melting and mixing of RAP binder with virgin binder  Result is stiff, non-homogeneous mixes with poor workability

Limitations of RAP

SOLUTION

Zycotherm reduces the binder surface tension – enables better wetting, faster coating and easy mixing. This better wetting and faster coating ensures efficient heat transfer in the same available mixing time Easy mixing of Virgin binder and molten binder from RAP, leads to homogeneous mix Bott ttom

• m Line:

e: One can increase the RAP percentage in the mix till the OBC is maintained. In other words, it is a trade-off between increase in RAP percentage (cost saving) and quality of plant mix.

ZYCOTHERM AND HEAT-TRANSFER TO RAP

Heat Transfer to RAP takes place as follows : Heated virgin aggregates[Conduction] RAP (Small part of total heat transfer) Heated aggregates[Convection] Molten Asphalt[Conduction] RAP (Major part)

ZT enables faster wetting of RAP and improves heat transfer efficiency to help melting and recovery of RAP in available mixing time, giving a homogeneous mix.

VIRGIN AGGREGATES @ ambient temp. RAP @ ambient temp. Heat Transfer through Radiation. Temp raises to 200-250 0C EXHAUST LIQUID ASPHALT @ 160 0C HOT MIX BURNER

Zydex Proposal for Increased RAP Without Additional Heat Input

Increase RAP with Same Heat Input

Heat balance calculations show that increasing the proportion of RAP in the mix by 6.5 % (of the total mix by weight) and keeping the heat input the same causes the mix temperature to drop from 157 oC (315 oF) to 146

• C (295 oF)

Since Zycotherm improves heat transfer and increases incorporation of the RAP binder it produces a homogeneous mix even at reduced temperatures. The Zycotherm mix will have excellent workability and will give equivalent

• r better compaction than the original mix even at compaction

temperatures which are lower by 20-35 oC (40-70 oF )

Zycotherm RAP Cost Calculation (Indicative only)

Ass ssump umptions tions : Cost of Asphalt Mix ~ $50 / ton Cost of RAP (Including Milling, Crushing & Transportation ~ $8 / ton Total binder % in Mix (From RAP + Virgin) ~ 5.3% Comp

• mputations

tions : Difference in Cost of Conventional Mix and RAP = $42 / ton 6.5 % increase1 in RAP will save ~ $2.73 / ton (6.5% of $42) Cost of ZycoTherm SP (@ 0.1 %) ~ $0.96 / Ton

Net saving ing ~ $1.77 77 / ton ($2.73 73 – $0.96 96)

Note : 1. Applicable only for original designs with RAP 25% or less. 2. No extra heat input will be necessary, for RAP increase by up to 6.5%.

Benefits Other Than Cost Savings

Produc ucti tion

• n Benef

efits ts:  Better density even at compaction temperature reduced by 20-35 oC (40-70 oF)  Blacker and glossy mix and no segregation  Cleaner flights, slats, silos and truck beds  Substantial Low emission & low odor Pe Performan rmance ce ov

• ver

er long ng term rm :  Excellent anti-strip performance  Excellent rut-resistance mix

ZYCOTHERM + RAP – TYPICAL ECOMMENDATIONS

• Over heat aggregate to 250 deg C . add 35% Cold RAP in

collar section. Mix for min 25-30 sec.

• Use 70-100 Pen binder if using 60-70 Pen grade binder with

RAP

• The final production temperature should be maintained at

145 deg C.

• If you preheat RAP to 120 deg C by installing preheaters

then you can add up to 60% which is recommended mainly for Binder layer below wearing course.

• Increase the RAP by 6.5% without any extra heat input

• Zycotherm modified asphalt binder coats RAP faster,

enables better heat transfer to achieve quicker heating and melting of hardened asphalt

• Improves ease of mixing of aggregates
• Better mixing & melting helps virgin binder to mix

homogenously with aged asphalt binder from RAP, to ensure binder mix uniformity

• Zycotherm mixes are greasier and compact easier even

at higher RAP / RAS %, achieving 1 - 2% higher densities

HIGHER RAP - HIGHER SAVINGS

RAP EXPERIENCE IN WASHINGTON STATE PROJECT

A large nationally‐ranked contractor in US, milled and paved 16,000 ton

• n SR 16 in August 2014 for the Washington State Department of

Transportation using a 43% recycled asphalt pavement mix design. Owner: WSDOT Producer: Nationally Ranked Contractor Paver: Nationally Ranked Contractor Location: Burley Olalla to SR 303 Production Temp: 296 F Compaction Temp: 275 F RAP: 43% ZT Dose: 0.16% Size: 16,000 tons ZycoTherm passed the Hamburg Wheel Test with only 5.6 mm of rutting at 15,000 passes with no inflection point.

Quality and Price of Fuel will decide the Saving achieved: Our Field experience has shown that typical saving of $0.80 – $1.5 per ton of

• HMA. This varies from plant to plant and region to region

Bitumen Optimization: $ 0.60 – $ 2.4 per ton HMA (80-90 % mixes have a lower OBC in base, binder & Wearing course. Field experience shows typical reduction of 0.1 – 0.4% per ton of HMA Anti-strip agent/ WMA additives : Costs $ 0.60 – 2 per ton HMA, ZycoTherm eliminates the use of these agent / additives Extra RAP Usage : With Zycotherm you can use nearly 7% extra RAP with no need to use rejuvenator Cleaner Equipment's, tanks, tipper & paver: No need for an additional chemical for cleaning equipment when working with Zycotherm

ECONOMICS

68 68

UP RAJASTHAN BR O MP CHATTISGARH MAHARASHTRA AP KAR JAMMU & KASHMIR

PUN

WB PUNJAB BR O

Technology being used across length and width of India

69 69

Poland Warmian-Mazurian Voivod Road 511, PRDiM Lidzbark

Production: 155o C Compaction Initial Temp: 135oC Mix Type: AC11 PMB 45/80-55 ZT EZ Dose: 0.1% Air Temp: 2o C Paving Time: Morning Wind Speed: Weak Haul Length: 25 Km Haul Time: ½ Hour Year: 2016

70 70

Poland Zabrze, Skanska

Production: 150o C Compaction Initial Temp: 115-120oC Mix Type: AC 16 W 35/50 Aggregates: Limestone

RAP: 35%

ZT EZ Dose: 0.10% Air Temp: 15o C Paving Time: Night Wind Speed: Strong Haul Length: 90 Km Haul Time: 1 ½ Hours Year: 2015

Sample Height [cm] Bulk Density in-situ [Mg/m3] Bulk Density in-lab [Mg/m3] Maximum Density in-lab [Mg/m3] Compaction index [%] Air voids [% (v/v)] 7,2 2,401 2,460 2,570 98 6,6 7,2 2,418 2,460 2,570 98 5,9 7,7 2,443 2,460 2,570 99 4,9

71 71 50 100

ITSR [%]

ITSR

ZycoTherm 0,1% 5 10 produkcja badanie typu

PRD [%]

PRD [%]

ZycoTherm 0,10%

Poland Zabrze, Skanska

• ITSR above 90 % in the plant mix

[WT-2 2010, ITSR min 80%]

• Rutting (wheel tracking test, dry

method) below 6% in the plant mix [ PN-EN 13108-20: AC16 W PRD max 7%, traffic category 3-4]

72 72

Poland Wisznica Voivod Road 812, Skanska Lublin

Production: 170o C Compaction Initial Temp: 140oC Mix Type: AC16 W 50/70 Aggregates: Dolomites + Sandstones

RAP: 25%

ZT EZ Dose: 0.05% Air Temp: 4o C Paving Time: Night Wind Speed: Strong Haul Length: 80 Km Haul Time: 1 ½ Hours Year: 2016

73 73

Sweden Fridhemsgatan Sundsvall, Peab

Production: 150-155o C / *135o C Mix Type: SMA 11 Bitumen: 6.2 % (0.3% less)

RAP: 20%

ZT Dose: 0.1% added at Nynas depot Paving Time: Early / *Late morning Wind Speed: Strong Year: 2013

SMA 11 at 150⁰C - 155 ⁰C with lots of bitumen smoke around the paver SMA 11 at 135 ⁰C with no bitumen smoke around the paving crew

74 74

USA WA State RAP Project

A large nationally‐ranked contractor in US, milled and paved 16,000 ton on SR 16 in August 2014 for the Washington State Department of Transportation using a 43% recycled asphalt pavement mix design. Owner: WSDOT Producer: Nationally Ranked Contractor Paver: Nationally Ranked Contractor Location: Burley Olalla to SR 303 Production Temp: 296 F Compaction Temp: 275 F RAP: 43% WMA Dose: 0.16% Size: 16,000 tons ZycoTherm passed the Hamburg Wheel Test with only 5.6 mm of rutting at 15,000 passes with no stripping inflection point

75 75

USA Colorado Long Haul Project, Elam Construction

An independent survey of the roadway in 2015 found minor reflective cracking in

• ne section, but
• therwise no
• bservations of

rutting, cracking, or raveling/weathering after numerous harsh Rocky Mountain freeze/thaw cycles

Production: Compaction Temp: Binder: PG 58 - 28 ZT Dose: 0.10% Haul Length: 100 Miles Year: May 2014

76 76

Canada Trans Canada Highway, Lahrmann Construction

Owner: Alberta Trans, Suffield , Production: 250-285 oF Compaction Temp: 212- 250 oF Binder: PG 64 – 28

RAP: 20%

ZT Dose: i) 0.10% 30,000 tons ii) 0.12% 90,000 tons (10

• C drop)

Year: Summer 2015

• Mix not sticking

to the shoes.

• Break-down

roller was not shoving material and that the roller-checking was gone

• Able to finish

roll at cool temperatures, with no trouble keeping up with the roller train

THANK YOU