Rediset WMX Ecuador R

8/4/2019 Rediset WMX Ecuador R

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Angelo Almeida & Tony NgAkzoNobel Surface Chemistry

Intercambio Technológico de Nuevas Metodologíasde Construcción y Conservación Vial

Quito, Ecuador

Warm Mix



Beyond just a Warm-Mix Additive

Best Possible Anti-stripping agentfor hot-mix

No water/moisture introduced

Rediset WMX

Patents pending: Prem Naidoo, S. Logaraj Patents pending: Prem Naidoo, S. Logaraj

& A. James & A. James



3Surface Chemistry

RedisetTM WMX Solutions

Main Focus1. Reducing mix, laydown and

compaction temperatures

2. Addressing moisture damage inwarm-mix

• Inefficient aggregate drying at

lower temp• Low temperatures being pushed to

extreme limit

3. Maintain PG Integrity of Binder

4. Cost Effective Solution



4Surface Chemistry

Hot Mix and Warm Mix

REDISETTM WMXStandard Hot mix



5Surface Chemistry

Reduction in Compaction Temperatures

4

4.5

5

5.5

6

6.5

7

300 F 270 F 240 F

Compaction Temp.,

% A

i r V o i d s

Control

wmx 7002

• PG 76-22 Asphalt

• Superpave coarse graded granite mix (12.5 mm max)



6Surface Chemistry

Mechanism of Moisture Damage

Adhesion and Cohesion Failure by Moisture

Aggregate

As

phalt



7Surface Chemistry

Moisture Damage

• Adhesion failure

• Water has a higher affinity for aggregatecompared to asphalt

• Asphalt cannot bond to aggregate with a wetsurface

• Cohesion failure• Inclusion of water within asphalt will weaken it’s

cohesive strength

• Moisture/Water should be eliminated from mix and

not incorporated

• Rediset products are designed to improve bothadhesion and cohesion in asphalt mixes



Moisture Damage Survey*

Do You Treat HMA for Moisture Damage?

PredominantType of TreatmentUsed

LimeLime or liquids

LiquidsLiquids seldomNo or very rarely

*Tim Aschenbrenner, Moisture Damage Symposium, San Diego, 2003



9Surface Chemistry

Texas Hamburg Wheel Tracking Test

APAC 76-22 Asphalt

250 F

250 F

300 F

Comp.Temp.

12.4029,9756.82.0Rediset WMX-7002

12.3229,9006.82.0Rediset WMX-7001

<12.5>20,0007.10.75Control + LAS

Deform,mm

Cycles tofailure

% AirVoids

Additive%

Material ID

Type D Surface, Design #7-MMD-05

Hamburg Test Temp 50°CA= Added to binder

B= Added to aggregate mix



10Surface Chemistry

Hamburg Wheel Tracking TestLime comparison – PaveTexNote: Lime at 2% mix vs Rediset™ at 2% binder

0

2

4

6

8

10

12

14

Deform, m m

Rut Depth at ~20,000 Cycles

Control

Hydrated Lime

Rediset WMX-7019

Rediset WMX-7020



11Surface Chemistry

PG Testing ResultsPG 64-22 Enhanced High & Low Temp

67.0 -29.164.4 -24.5Continuous PG Grade

0.3630.337BBR, Slope m-Value @ -12º C

122200BBR Creep Stiffness, S, @ -12º C

2.882.51RTFOT G*/Sin d (kPa) @ 64ºC

1.431.05G*/Sin d (kPa) @ 64º C

PG 64-22 +

2%

WMX 7002

PG 64-22Test



12Surface Chemistry

Rediset

TM

WMX• Solid Additive – Pastilles

• Added to theasphalt

• Also can be addedto the mix at the hot-

mix plant



13Surface Chemistry

RedisetTM WMX FunctionImprove Mix Workability

1. Reduce surface tension ofasphalt

2. Additives has a lubricatingeffect on the asphalt mix

• Easier to coat the aggregateand easier to compact

• Reduce mix and compactiontemperatures



14Surface Chemistry

RedisetTM WMX - FunctionIncrease Resistance to Moisture Damage

• Improves

adhesion/chemicalbonding of asphalt

• Also improves thecohesive strength ofasphalt



15Surface Chemistry

Trial at Chico, California

Significant Reduction in Fumes

240-250°F Warm-Mix

with 2% RedisetTM WMX-7002300°F Control

PG64-22 Mix, Chico Trial, 12/15/2007



16Surface Chemistry

Chico, CA Trial

• The field densities at

240°F and 270°F werebetter compared to thecontrol at 300°F.

• Major improvement in themoisture resistanceproperties

• Based on TSR Test



17Surface Chemistry

Warm Mix Trial Chico, California

% Relative Compaction, ASTM D2726 Method

90.6%2.286300oF Mix (Ave.)

Control

92.7%2.339270oF Mix (Ave.)

RedisetTM WMX 2%

92.2%2.327240oF Mix (Ave.)

RedisetTM WMX 2%

%RC RiceCore Density(bulk)

Type of Mix

PG 64-10 Asphalt Mix



18Surface Chemistry

Warm Mix Trial Chico, CaliforniaTensile Strength Ratio*

Warm-Mix

Additive

Dry Tensile

Strength

psi

Wet Tensile

Strength

psi

Tensile

Strength

Ratio %

Control 122.8 55.2 45.0

WMX-7002 240oF 147.9 109.3 73.9

WMX-7002 270oF 124.7 100.7 80.8

WMX-7002 279oF 114.9 100.2 87.2



19Surface Chemistry

APAC Dallas, TX Trial, 02-07-08

Extending the Paving Season

• PG 76-22 Mix

• Paving at 50°F to 60°Fair temperature -windy

• Mix produced at 265°Fto 310°F instead ofnormal 325°F (60°Flower)

• Mix with 15% RAP



20Surface Chemistry

Warm Mix Trial at Dallas TX

Main Observations

• Field densities were in the

desired range• Workable even up to

215°F

• First time paving PG76-22

mix <70°F in Dallas area

• Mixes passed the HamburgWT tests (>20,000 cycles)

• Mixes with 15% RAP alsogave good results



21Surface Chemistry

Lufkin, TX Trial – Field densities

Comparison with other Techniques

87

87.5

88

88.5

89

89.5

90

90.5

91

91.5

Control 295-280F T1 225-150F (1.5

lbs/Ton)

T2 225-140F (5

lbs/Ton)

T3 220-140F (5

lbs/Ton)

Rediset 225-140F

(2 lbs/Ton)

D

e n s i t y %

2% Rediset WMX-7002



22Surface Chemistry

Trial with APAC at Beaumont, TX 09-04-08

SMA Mix

• Polymer modified PG 76-22 SMA mix

• Feeder road on I-10 in Beaumont, TX

• SMA mix difficult to compact under normalconditions

• 800 tons during the day of the trial

• 200 tons were placed during a pre-trial



23Surface Chemistry

Trial with APAC at Beaumont, TX

SMA Mix, I-10 Feeder Road



24Surface Chemistry


Main Observations

• 55°F to 65°F reduction in mix temperature

• Compaction between 250°F to 210°F

• Initial field densities in the range that would result inbonus payment

• Good results with the Hamburg WT tests (>20,000cycles)

• Paving crew experiences significant reduction infumes and odor

• APAC pleased with the results and looking towardsusing our additive in cooler months to extend theseason



25Surface Chemistry

Commercial Project with APAC

Jasper TX – 40,000 tons

• PG 70-22; limestone mix

• 60°F reduction in mix temperature

• Rediset WMX dosed into the drum dryer

• Also pre-blended with the asphalt in the tank

• Paving starting at 50°F air temperature

• Good field densities

• Good Hamburg results



26Surface Chemistry


Jasper, TX - Paving



27Surface Chemistry


Jasper, TX - Compaction



28Surface Chemistry

Matt Corrigan - CalAPA Warm-Mix Conference

Sacramento, April 2009



29Surface Chemistry

Trials Outside US

Vägverket Sweden

2003030Nov2008SKANSKA for

IRELAND

2003020Nov2008IRISH TAR

weather paving

1003030Night time coldOct.2008

VEIDEKKE,NORWAY

RoadPlant

°CLocation

TonsTemp.

Reduction,FocusDateProject



30Surface Chemistry

Norway Trial at air temperature of -2°C30°C to 40°C Reduction in Compaction Temp



31Surface Chemistry

Norway Trial at air temperature of -2°C30°C to 40°C Reduction in Compaction Temp

• 70-100 Pen asphalt

• Densities were inthe desired range

for the mix withRediset and Control



32Surface Chemistry

Rediset WMX Unique Features

Apart from reducing mix and pavingtemperatures up to 30°F to 70°F

1. Warm-mix Additive and adhesionpromoter in one

• Will replace lime or liquid anti-stripping additives

2. Maintain asphalt PG grade• Improve low temperature

properties of certain asphalts

4. Works with a wide spectrumof asphalts, aggregates and mixes

5. No Moisture/Water incorporated.



33Surface Chemistry

RedisetTM WMX Solutions

Other Warm-Mix Benefits

1. Reduction of asphalt fumes atmixing plant

2. Fuel savings ~20%

3. Reduction of asphalt fumes at

paving site

4. Ease of mixing and compactionreduce operational costs

5. Paving in non-attainment areas,cool weather paving, extendpaving season, longer hauls,night paving.



34Surface Chemistry


APAC and DOT officials

Thank You

Documents

Rediset WMX Ecuador R