Asphalt matters
News from the world of Asphalt

Fall 2021

Content
Applications around the world4

Successful cold recycling project with Redicote E-7100 emulsion
at Glen Elder, Kansas
Unique Nouryon Surfactant package for Asphalt emulsion based water
proofing formulations
Growth in base stabilization with emulsions in India
The Emulsion Asphalt Prime (EAP), prime coat application in Thailand

Products

14

Eco premium solutions for sustainable asphalt pavements
Use of adhesion promoters to extend the life of asphalt pavements in Vietnam
Successful field application with Redicote C-580 emulsion at Mt PleasantConferences and Asphalt schools

242021 virtual Asphalt school / webinar – update
Asphalt SEA academic seminar 2020 – participation

Inside Asphalt applications

28

Meet our Asia Technical specialists

Asphalt Matters is published by:
Nouryon Asphalt Applications
asphalt@nouryon.com
Editor: Sundaram Logaraj

2

We are happy to publish
Nouryon’s 2021 Asphalt matters newsletter
It contains technical articles about interesting asphalt
applications from various parts of the world as well
as exciting products launched by Nouryon

Applications
aroundthe world3

Successful cold recycling
project with Redicote E-7100
emulsion at Glen Elder, Kansas
Innovations to enhance sustainability of asphalt pavements.
Successful commercial project at Glen Elder Kansas – Cold in place (CIR) field
application of emulsion made with Redicote E-7100.
Article by Mike Jenkins and Sundaram Logaraj
The use of cold mix and cold recycling withemulsions is growing in many countries. In
developed countries recycling is becoming
more and more popular as there are restrictions
on mining new aggregates and also there issavings if one uses recycled materials. Cold
recycling with emulsions have a much higher
impact on sustainability due to significant
reduction in energy, reduction in emission
and the use of recycled materials. The useof emulsions is also attractive as the oxidized
and aged pavement does not undergo
further oxidation by being subjected tohigher temperatures as in hot-recycling. In
certain countries the use of virgin cold mix is
growing such as in India for secondary roads
in remote regions where hot-mix plants are
not accessible. Countries such as Sweden arepromoting cold mix to reduce emissions andenergy consumption associated with paving.
Cold in-place Recycling (CIR) as a pavement
rehabilitation technique has several advantages.
The use of existing or in-place materials insteadof transporting mixes from a different site
generates additional cost saving and provides
environmental benefits. The use of emulsions
as a binding or stabilizing agent reduces in

4energy costs and emissions as the production
and placement of mixes are done at ambient
temperatures compared to a hot or warm mix
application.
In cold-in-place recycling (CIR) there is a needfor an emulsifier or emulsion systems thatbuilds faster cohesion but still gives enoughworkability. Often a certain amount of cement
is used in such mixes and the emulsifier systemthat is used needs to give enough workability inthe presence of cement. The existing emulsifiersystems are too slow and do not build strength
quickly after placement and compaction. The
systems that build quick cohesion quickly
breaks in presence of cement and does notgive enough workability. Nouryon introduced
the Redicote E-7100 emulsifier that can beused to produce emulsions for CIR applications
that builds faster cohesion development andreduce curing time compared to common
CSS emulsifiers. It is also compatible withcement and so will give enough workability
in mixes with or without cement. In addition,
RedicoteE-7100 emulsions exhibit lesssettlement and better storage stability
compared to other CSS emulsifiers.

Cold in-place recycling – Courtesy of Pavement
Recycling Systems (PRS)

University of Arkansas cold mix related
research sponsored by us
We have been working with Universities suchas University of Arkansas and industry leaders
such as Ergon and Pavement Recycling systems
in order to come up with better emulsifier andemulsion system to give optimum performancein cold mixes including CIR applications. The
goal is to optimize emulsifier and emulsion
formulations to balance workability andcompactability with cohesion/strength gain andadhesion.

We sponsored a research program at the
University of Arkansas with Dr. Braham and his
group. The goal was to develop and optimize
laboratory test methods to measure workability,
compaction, and cohesion gain in cold mixes
with emulsions starting with CIR applications.
One of the main aspects of their study was also
to develop correlation between lab results andfield performance. Dr. Braham and his team
were especially involved in monitoring andcollecting data from this particular field trial.
The first field trials with emulsions made from
Redicote E-7100 was conducted in May 2020.
The trail took place in a location called Glen
Elder in Kansas. The emulsions formulations
were developed and Optimized by Paragon
Technical Services. The mix design for thisparticular CIR application was also developed
by Paragon Technical Services. A CSS special
grade of emulsion was produced for the trial
with Redicote E-7100.

5

Emulsifier and emulsion formulations

CIR mix design and lab test results

The typical dosage of Redicote E-7100 in
the emulsions is 2.0%. The following are
the advantages of using Redicote E-7100 inemulsions for CIR applications:

The CIR mix for this project was designed by
Paragon Technical Services. The RAP material
supplied as cores were crushed and evaluated.
The CSS emulsion made with Redicote E-7100
with a binder content of about 65% was used.
The mix was optimized to contain 4.6% total
water and an emulsion content between 2.53.0% based on dry weigh of RAP. It was also
recommended to use cement between 0.250.75% by the dry weight of RAP.

Benefits

Comparison withother products

Faster cohesion
development in
CIR applications

Reducedcuring time

Faster settingLess sensitive tocementCan be usedin CIR mixes
containing
cementEmulsion with certain
emulsifiers are
sensitive to cement

Good quality
emulsionsGood
storagestability

Better storage
stability compared toemulsions made withcertain products

Redicote E-7100 emulsions give good storage
stability test results compared to other emulsion
systems.
15

Redicote E-7100
Emulsifier B (2.0%)

10
50
1 day %

5 day %

Storage stability test results, evaluations performed by
AASHTO accredited laboratory

Redicote E-7100 emulsions are associated witha chemical break during CIR mix production
and paving and so they tend to develop
strength quickly unlike normal CSS emulsifiers.
In spite of faster break compared to other CSS
emulsifiers, Redicote E-7100 emulsion is also
more stable with cement and so they will still
provide necessary workability for placement
and compaction of the mix in CIR applications.
Emulsions made with Redicote E-7100 will passcement mixing test.

6

Field trial
The CIR job site was on Glen Elder Road, justsouth of Glen Elder, Kansas. Various personnel
were present including Dr. Braham from
University of Arkansas, Donna Kwapis and Mike
Jenkins from Nouryon. University of Arkansas
was monitoring the trial and their main goal
was to develop correlation between lab results
and field performance. They were collecting
field materials including RAP and emulsions andcollecting field data using a device developed
by University of Arkansas called the Stiffness
Raveling Mechanism Test (SRMT).

Stiffness Raveling Mechanism Test
(SRMT)
According the field observations conductedby University of Arkansas, the air temperaturesduring construction were in the mid-60s to
mid-70s (°F). while the pavement temperature
was approximately 90-115°F and there waslight wind during the entire project. The SRMT
values in general should increase with increasein density during compaction but the collected
data was not accurate enough as there washigh level of variability of rebound heights. In
general, the SRMT data for this particular trial
was similar to that of the results with normal
CSS emulsion but the main difference that wasobserved was that the section using Redicote
E-7100 section showed less segregationcompared to normal CSS emulsion. This could
be attributed to the increase in workability
provided by Redicote E-7100 emulsion in thisCIR application.

After full compaction section (top)using Redicote E-7100 emulsion
showed less segregation
The contractor constructing this sectioncommented that they are pleased with theperformance of the Redicote E-7100 emulsion
as it was easy to place and the paving crew
liked working with this emulsion. Ergon waspleased with results and commented thatindustry needs such new chemistry for CIR
applications. One of the conclusions from the
University of Arkansas trial report was that thesection that used Redicote E-7100 emulsion
showed noticeably less segregation compared
to normal CSS emulsion used in this project.

7

Unique Nouryon Surfactant
package for Asphalt emulsion
based water proofing
formulations
Anionic asphalt emulsion based waterproofing paints has been one of hottest
topics and market is witnessing a fast growth since this technology can finda number of uses such as, sealant for gapping filling (concrete ), non-cured
primer for bitumen sheet, primer for bitumen sheet.
Article by Royan Xu
In addition anionic asphalt emulsion based
waterproofing has a good compatibility with
bitumen as they are composed of the samebase material (asphalt/bitumen).
Anionic SBR, pure acrylic or Styrene/acrylic latex
are used to modify the asphalt to improve many
aspects, for example the flexibility under lower
temperature, impermeability, resistance totemperature variation, ageing, ability to bridge
cracks, stickiness of wet and dry state and water
resistance.
The most critical part is to make an anionicasphalt emulsion with a good Ca2+ ion
stability and mechanical stability, since thewaterproofing formulation will contain CaCO3
filler which may leach out some Ca2+ ions.
During paints manufacturing, it will undergo
some mechanical shear /dispersion when thepaints are applied on the substrate. Paints will
also be subject to some shear due to roller,
brush or spraying.

8

While formulating anionic emulsion, we follow
some general rules regarding emulsifier.
We came up with a suitable surfactant packagethat give good shear stability and Calcium ion
stability to the emulsion.

A mixed monolayer surfactant molecules stablize
emulsion droplets

Our China team have witnessed the market
growth and invested a lot resource througha comprehensive study and launched oursolution which consists of a unique surfactant
package during Chinacoat 2020, Dec 8-10.
Alongside this, we also recommend otherproducts to formulate the paints, including
Bermocoll, Alcosperse and Alcogum series.

The formulation of anionic emulsion will becomposed of as below.
Asphalt: 60%
Nouryon surfactant package: ~3%Adjust pH to approx 11.0
Add water up to 100%
Our solution show an excellent properties in
Ca2+ stability, mechanical stability, finer particle
size and anti-settlement, typical performance islisted as below:

Starting formulation for asphalt
emulsion waterproofing paints

Our solution unique surfactant package

Composition

Solid content

60%

Bermocoll Prime 2500

2.0

pH

~11.5

AMP-95, pH adjustor

0.5

D50,um

1.4-1.6

Latex acrylic emulsion from BATF (FS-670)

300

Viscosity, 25°C

34-38

CaCO3, 400mesh

300

Mechnical stability

Good

Alcosperse 602N, dispersant2

Ca2+ stability

Good

Defoamer NXZ

2Asphalt emulsion

300

Furthermore, many customers show a greatinterest in this technology, Skshu Paints (thebiggest local paints manufacture in China)
has completed the trial production basedon our solution ,with a good preliminary
result ,customer is much satisfied with theperformance and storage and application is stillongoing.

Defoamer
Alcogum L-344

Weight /g2
2.5-4.5

Water

17

Biocide1

Water

up to 1000

Courtesy of Skshu Paints

9

Growth in base stabilization
with emulsions in India
Cold mixes including base stabilization with emulsions is becoming popular
in several countries. These stabilization techniques have several benefits andare used for structural layers including heavily trafficked pavement.
Article by Indrajeet Upadhyay
The purpose of stabilization is to enhance theproperties of material which results in increased
strength and load bearing properties. There areample reasons for stabilization of RAP materials
to eradicate the need to quarry non-renewable
natural aggregates. However, the main reason
for utilizing stabilized material with emulsions
is improving performance of material byincreasing its strength, stiffness, durability andcost savings.
To achieve stabilized RAP material cement ismixed as a stabilizer by 0.5-1.0% and SS2 grade
emulsion 3.5% (formulated by using Redicote
E-4875 NPF ) by weight of the total mix. In orderto obtain proper coating, stability and better
compaction, pre-wetting of mix is done with
(1-3)% of water prior to addition of emulsion.
In the emulsion based cold mix technology, theprocess involving the addition of pre-wetting
water to the aggregate, thereafter addition ofemulsion, production of the mix, laying andcompaction are all done at the room/ambient
temperature (25-30°C). It was also shown
through field trials that cold mix can be easily
produced by using hot mix plants and laid using
similar techniques.

10

The use of stabilized cement treated baseenables lowering cost, reduces emissions andresults in a worker friendly environment
For these reasons Base stabilization withemulsion is a Eco premium solution as they are
paved at ambient temperature greatly reducing
emission and energy use. This combinedwith recycled material greatly enhances thesustainability of asphalt pavement.

Benefits of utilizing RAP andcustomized bitumen emulsion cold
mix technology• Environment friendly and energy efficienttechnology• Construction feasible in all weathers
except wet conditions which increases the
productivity of the paving operation• Reduction in pavement thickness whenstabilized with emulsion compared togranular base by itself• Low to medium traffic can easily be allowedon bitumen stabilized layer whereas – incement stabilized layer only very low volume
traffic can be allowed• Quality control of bitumen stabilized layer iseasier than cement stabilized layer• Less manpower and machinery requirements• Comparatively lower cost of construction assaving of aggregate, fuel and logistics cost

• Especially suited for paving in remote areas
where hot-mix plants are not available due tothe following reasons• Low capital investment for cold mix plants• Easier to transport mix plants• Easier to transport emulsion and mixes• Emulsion can be stored for longer periodsof time• Well suited for on-site and in-placemethods

11

The Emulsion Asphalt Prime(EAP), prime coat applicationin Thailand
The benefits of prime coat are to enhance aggregate’s cohesion of road basecourse resulting in no surface damage prior to paving and to prevent water
penetration through the base course prior to paving. The prime coat acts as abinder to enhance boding between the base course layer and the subsequent
paved surface layer. This technique is commonly used worldwide to provide
a bond between the base course and asphalt layer.
Article by Naruesa Riwtong

12

Use of cutback asphalt and it’slimitations

Current practice in using asphalt
emulsions for prime coat

Cutback asphalts are often used for priming as
they are able to penetrate through dust layer
adhering to the base course, and also penetrate
through small pores so as to enhance cohesion
between aggregates. The use of cutbacks has
several drawbacks. Cutback asphalts contain
excessive amount of hydrocarbon solvent(approx 35-40%) resulting in slow curing (i.e. atleast one week before paving the base course)
but the main problem is that the evaporationof high amount of hydrocarbon solvent leads
to environmental pollution. In addition, it ishazardous for the workers since the cutbackasphalt is a flammable material which could
catch fire and there have been several accidents
during storage and use of cutback. Many
countries have banned the use of cutbackasphalts for these reasons. Moreover, use ofsolvent in the cutbacks adds to the total costowing to high amount of hydrocarbon solvent
used.

The production of asphalt emulsion requires
emulsifiers to disperse asphalt droplets in thewater. The kind of emulsifier determines thetype of asphalt emulsion such as cationic,
anionic, or non-ionic grades. Cationic asphalt
emulsions give better adhesion and faster breakwith commonly used aggregates compared toanionic and non-ionic asphalt emulsions. The
cationic asphalt emulsion is most commonlyused and mainly the slow setting cationictype asphalt emulsions (CSS-1) are used forprime coat application. However, all users areexperiencing the same problem, where theasphalt layer easily peeling off (i.e. no adhesion
to the base course) even if the emulsion
complies to standards, e.g. ASTM D2397, BS
434, etc. This is because even the slow settlingemulsion do not have enough chemical
stability and they break on the surface without
penetrating into the base.

When a few vehicles pass over the surfaces
begin to peel. In order to minimize this problem
the contractor usually spreads sand over thesurface. Although, this is effective, it costs more,and diminishes a core function of prime coat(i.e. a binder between base course and roadsurface) because of sand blocking between
the prime coat and pavement. Moreover, theused sand will absorb certain amount of asphalt
resulting in lesser amount of asphalt binderfunctioning as a prime coat.
The DOH (Department of Highways) in Thailand
specified the use of slow setting grades ofasphalt emulsion excluding cutbacks. Theseasphalt emulsions do not penetrate through thesurface even if it is an untreated base due to thereasons explained above. This resulted in theagencies not recommending the use of asphalt
emulsions for treated base. It is an establishedfact that prime coat is essential and therefore,
when the asphalt emulsions are used as prime
coat, any or all together of the followings aredone taking into account condition of the basecourse.
• Scarifying to a depth of 25 to 50 mm to breakup the surface allowing the penetration ofasphalt emulsions• Mixing asphalt emulsion and water to diluteasphalt and reduce the viscosity of asphalt
emulsion facilitating penetration• Spreading sand over the surface to preventthe asphalt picked up by vehicle’s tires

As explained before this is due to the factthat the asphalt emulsions typically do not
penetrate. They cure on the surface, and stickto the wheels of the vehicles instead.

Penetrating prime coat emulsion
formulations
Use of EAP (Cationic Asphalt Emulsion Prime)with the following general formulation canaddress all above drawbacks.
Here’s the typical EAP formulations with fuel oil
or bio-solvent:
Asphalt content (PG 64-22): 35-45%
Fuel oil / bio-solvent: 5-15%
Redicote EM24: 2%
Add water up to 100%
pH of emulsion: 2.0
The emulsifiers chemistry is chosen so that itgives good chemical stability. The use of certain
amount of solvents in the emulsion greatly
helps with the penetration. If one uses a biosolvent such as biodiesel or vegetable oils, they
have high boiling point and so do not cause
pollution problems.

13

Products

Our commitment to a sustainable future
We have a major emphasis on
sustainability by setting ambitious safetytargets, reducing carbon emissions by
25% in 2025, increase low carbon energy
to 60%, growing share of revenue insustainable solution and placing priority
on people development. One of the
key focus is in coming up with newsustainable solutions.Nouryon Asphalt
Applications over the years have come up
with several innovations to improve thesustainability of Asphalt pavements.

14

Eco premium solutions
for sustainable asphalt
pavements
Our innovations enhances sustainability of asphalt pavements.

Sustainability a key issue for the industry

Sustainable roads

More than 90% of roads in North America,
Europe are paved with asphalt and asphalt
pavements and it is the preferred choice for
new roads and surfaces treatments for the
rest of the world. Asphalt pavements haveseveral advantages as the roads do not need
to be closed for extended periods of time forconstruction, they are flexible pavements, canbe recycled easily, provide a smoother andquieter ride. The asphalt industry has beenworking towards reduction of emissions by
developing cleaner technologies including
warm mix , cold mix asphalt and minimizing
or eliminating the use of cutbacks by whichcontain volatile solvents with asphalt emulsion.
In addition to using such cleaner technologies
the greatest impact can be achieved by re-using
and recycling reclaimed asphalt pavements tobuild and maintain new roads. Utilizing suchapplications and materials not only improve
the sustainability in road construction but
also provides a healthier environment for theworkforce. The emphasis on sustainability
has been growing and agencies including
US Federal Highway administration (FHWA),
major organizations such as National Asphalt
Pavement Association (NAPA) and European
Asphalt Pavement Association (EAPA) havecurrently placed a high emphasis in improving
the sustainability of Asphalt pavements.

Bahia and Miller1 in their paper describe
possible definition of sustainable pavements
as ‘Pavement that minimizes environmental
impacts through the reduction of energy
consumption, natural resources andassociated emissions while meeting all
performance conditions and standards’. Use ofwarm-mix contributes toward reducing energy
and emissions. Cold mixes with emulsions
can have a much higher influence in reducing
energy and emission as the mixes are produced
and paved at ambient temperatures compared
to typical mix productions temperatures of
135-160°C for warm and hot mixes. Recyclingof existing pavement materials are becoming
more attractive not only due to sustainability
benefits but also in lowering the cost ofasphalt mixes. For these reasons cold recycling
with emulsions has a much higher impact inimproving the sustainability of asphalt paving. In
addition, certain amount of volatile solvents areused in asphalt paving in the form of cutbacks.
Most of these volatile solvents eventually endof evaporating into the atmosphere causing
pollution, the solvents cost money and also arehazardous as the solvents are flammable. Many
countries and agencies are severely restricting
or eliminating the use of cutbacks.

15

Rediset LQ and Rediset WMX
Warm-mix additives and compaction
aids
The strength and durability of asphalt
pavements depends on various factors
including the composition of the mix or mix
design. This also includes properties of thematerials used and the interaction between
asphalt binders with the aggregates. One of
the key factors in determining the strengthand durability of the asphalt pavements isthe ability of the mix to be compacted todesired densities and air-voids. A mix thatis not properly compacted will have poor
strength and will be prone to various pavement
distresses. The mixes are produced and paved
at higher temperatures, especially the mixes
that are harder to compact which substantially
increases emissions and energy consumption.
We introduced additives such as Rediset WMXand Rediset LQ which enable mixes to be
produced and paved at about 15 to 30°C lower
than conventional hot mixes. This is not only awarm-mix additive but also is a compaction aid
which gives several advantage to the contractor
including, achieving required densities withdifficult to compact mixes, extending thepaving season as the mixes can be paved atlower temperatures and increasing the hauling
distances for the mixes. These additives are alsohigh performance adhesion promoters and theyextend the pavement life not only by helping inachieving higher densities but promote bondingof asphalt binder to aggregate surfaces andpreventing moisture damage.

Use of Rediset LQ in a paving project at the Chicago
O’Hare airport

16

Prime coat application with asphalt emulsion

Redicote E11, Redicote E-7000 and
Redicote E-47 NPF
Solutions to substitute cutbacks withvolatile solvent free emulsions
Significant amounts of cutbacks are used inpaving which mainly goes into applications
such as prime coat. The use of cutbacks isprevalent in developing countries for prime
coat and tack coat. The use of cutbacks intack coat can be more easily substituted
with environmentally friendly emulsions but
in the case of prime coat normal emulsions
do not function as well as cutbacks. In prime
coat applications cutbacks or emulsions are
expected to penetrate the compacted basematerial to certain extent and then serve as abond between the base material and asphalt
pavement that will be placed on top. Most of
the normal emulsions are chemically reactive
and so they break on the surface and do not
penetrate. We developed formulation by
coming with a surfactant package that givechemically stability to the emulsion so thatthey do not break on the surface. In addition,
the emulsions contain a certain amount ofhigh boiling non-volatile bio-solvents such as
biodiesel or vegetable oils which further help
in improving the penetration into the base.
The surfactant package includes our uniqueemulsifies such as Redicote E-11 (cationic) andRedicote E-7000 (anionic) in combination witha non-ionic emulsifiers like Redicote E-47 NPF.

Redicote E-7100 and Redicote E-4880
Innovations for cold mix and cold
recycling
As mentioned earlier cold mix with emulsions
are done at ambient temperatures and so they
have much greater impact in reducing energy
use and emissions compared to hot/warm
mixes. Recycling of reclaimed asphalt pavement(RAP) minimizes mining of new aggregates
and also reduces the amount of virgin asphalt
binder in addition to lowering the cost of
mixes. Combination of emulsion based coldmix with recycled materials greatly enhances
sustainability.
There are several types of cold mix and cold
recycling techniques which include Cold
Central Plant Recycling (CCPR) and ColdIn Place Recycling (CIR). These are mainly
divided into plant produced mixes where
the RAP material is taken to a central plant
where is it is crushed screened and then coldmix with emulsions is produced in a central
cold mix plant. These types of mixes have toremain workable for longer periods as it may
take hours to transport the mix to the job site
besides being in the stockpile for some time.
Some of the normal slow set emulsions andemulsifiers break faster and so do not provide
long workability time. We introduced a slow
emulsifier or emulsion system that gives
extended workability. Redicote E-4880 is theemulsifier launched for plant produced mixes.
15

Redicote E-4880

10

Emulsifier B (2.0%)

50
1 day %

5 day %

Storage stability test results, evaluations performed by
AASHTO accredited laboratory

30
25
20
15
10
5
0
CSS A
1.2%

CSS B
1.2%

Redicote E-4880
1.2%

Simulated lab workability test without cement

In the case of in-place recycling (CIR) there
is a recycling train which mills the existing
pavement, transfers the material to a recycling
unit where it is crushed, screened and mixed
with emulsion to produce cold mix. In manycases certain amounts of cement is also usedin this type of recycling application. This coldmix is immediately picked up and paved on
the road surface followed by compaction. In
this type of recycling extended workability is
not needed and the focus is towards gaining
strength quickly so that it can be opened tolight traffic sooner. Relatively faster breaking
emulsion/emulsifier systems are used forin-place recycling. In some of these systems
it was found that when cement is added theemulsion starts to break quickly and does notgive the necessary workability even for this inplace application. In order to address this issue
Nouryon introduced a new emulsifier called
Redicote E-7100 which is faster breaking but
have good stability in the presence of cement
and so does not reduce workability when
cement is used. Redicote E-7100 also provides
additional benefits such as better emulsion
storage stability and improved adhesion in spiteof being a slow set emulsifier.

17

Redicote C-580
Chipseal/surface dressing

Greener products

Chipseal or Surface dressing is one of themost prevalent surface treatment/preventive
maintenance treatment using emulsions. The
rapid set emulsions such as CRS-2 or thepolymer modified version of CRS-2 need tohave a certain higher viscosity to meet the
specifications for this application. This viscosity
specification is harder to meet with certain
asphalt binders especially during recent times
when properties of asphalt binder are changing.
In order to meet this viscosity specification
emulsion producer needs to use a higher binder
content in the emulsion which adds significant
cost. We over the years have introduced a
few viscosity building CRS emulsifiers forthis application but still there was a need for
liquid easy to use product that builds viscosity.
Nouryon recently launched Redicote C-580
which is a cost effective, liquid easy to use
CRS emulsifiers. This has very good solubility
in acidified water and so soap solutions can beprepared even at ambient temperature water. It
gives the highest viscosity compared to most of
the CRS emulsifiers in the market which enables
emulsion produced to use the minimum
binder content to meet emulsion viscosity
specification providing cost savings. In addition,
Redicote C-580 can give a faster-breaking
system in chipseal/surface dressing applications.
Viscosity 122°F (50°C) comparison
500

The use of NP ethoxylates is being restricted
or eliminated by various agencies. We took
a proactive step well ahead of time andsubstituted NP ethoxylates with environmentallyfriendly alternatives in our asphalt emulsifier
formulations. Furthermore, introduced
environmentally friendly phosphate ester based
adhesion promoters such as Wetfix G400 andconstantly looking for opportunities to use raw
materials from sustainable sources.
Sustainability is a major focus for Nouryon andAsphalt applications. We have come up withseveral innovations to enhance sustainability ofasphalt paving. This includes unique emulsifiers
for cold mixes and cold recycling withemulsions, viscosity building liquid emulsifier forchipseal/surface dressing, warm-mix additives/compaction aids, emulsifier systems, emulsion
formulation to eliminate the use of cutbacks inprime and tack coat applications and greener
products.
References:
1. Bahia, H., Miller, T., Sustainable Asphalt
Pavements: Technologies, knowledge Gaps
and Opportunities, Prepared for the Modified
Asphalt Research Center (MARC), 2009.
2. Kazmierowski, T., Ministry of Transportation
Ontario Canada, Sustainable Benefits ofEmulsion-Based Pavement Preservation
Treatments: Ontario’s Experience, AEMA, 2010.

SFS

400
300
200
100
0
Emulsifier A

Emulsifier B

Redicote C-580

Emulsifier C

CRS-2 emulsion viscosity comparison made withvarious emulsifiers18

3. Eckmann, B., Delfosse, F., Chevalier E.,
Reducing emissions and consumption of virgin
aggregates through cold in-place recycling,
Eurasphalt & Eurobitume, 2012

Successful field application
with Redicote C-580 emulsion
at Mt Pleasant
We launched Redicote C-580 in April this year which is a viscosity building,cost effective, liquid and easy to use CRS emulsifiers. This has very goodsolubility in acidified water and so soap solutions can be prepared even atambient temperatures.
Article by Joe Brandenburg
On August 18th, a Midwestern emulsion
manufacturer trialed the Redicote C-580 in
a CRS-2M chip seal emulsion. CRS-2M is aMichigan Department of Transportation cationicpolymer (SBS or SBR latex) modified chip seal
emulsion. This particular emulsion had SBR
latex for its polymer. The test section for thisproject was located in Mt Pleasant, Michigan on
E Airport Road and S Summerton Rd. These are
two-lane county roads with a standard width of
22 feet used for daily traffic and to reach the Mt
Pleasant Municipal Airport. The test section on
E Airport Road was approximately 1.8 miles longand the test section on S Summerton Road wasapproximately 2.0 miles long.

The aggregate used in this trial was MDOT’s 34
CS-M slag

The shot rate was approximately 0.33 to 0.35
gals/sqyd. The CRS-2M temperature wasapproximately 160°F (71°C). The air temperature
was 81°F (27°C) with a relative humidity of 56%.
Skies were sunny with few clouds and there wasno perceivable breeze. The manufacturer madethe CRS-2M emulsion the previous day andtheir lab results are as follows:• Off the mill: Viscosity of 330 seconds with aresidue of 68.30%, demulsibility between
65-80% (visual check)• Halfway check in tank: 251 seconds viscositywith a 68.17% residue• Final check: 196 seconds viscosity, 68.04%
residue, 0.012% sieve, 69.87% demulsibility(0.25% C-580), 101 dmm penetration, 8.99
and 7.74 for toughness and tenacity, and67.5% elastic recovery
19

The application of CRS-2M by a Midwesternchip seal contractor went very well. The crew
was experienced and paid close attention todetails. The application of CRS-2M began on
the far east side of Airport Road, which wasapproximately 1.8 miles. From there they moved
to S Summerton Road which was approximately
2.0 miles. They were able to shoot full width on
Airport Rd.

As observed, all spray nozzles were properlyaligned and not clogged.

20

The chip spreader followed the distributor
closely, never allowing too much distance
between them and applying a single layer orcover aggregate.

The aggregate appeared to have proper
embedment into the emulsion between 50% to
70% of its width.

There were two pneumatic tire rollers present
on this job. Approximately 5 minutes after
application of the cover aggregate, they begancompaction.

The chip seal developed enough strength
so that it was drivable for car traffic withing
15 minutes, but out of caution and safety of
the crew the traffic controllers waited for the
distributor and chip spreader to be off the road
before cars were allowed back on.

The overall application of CRS-2M
manufactured with Redicote C-580 went
extremely well. The emulsion’s field viscosityand film thickness allowed for proper aggregate
chip embedment. The spray bar was at thecorrect height and pressure to allow for double
coverage, which allowed for proper coverage
without streaking during application keeping theemulsion from running off the side of the road.
After the cover aggregate was applied, within
10 to 15 minutes you could take the bottom ofyour heel and twist it and notice the strengthof the chip seal, which gave a good indication
there was proper adhesion. As reported above
the manufacturer’s lab tested the emulsion’s
demulsibility at 69.8%. This demulsibility
seemed low considering the dosage of 0.25%
Redicote C-580 and the use of latex which
will lower the demulsibility value. However, thechip seal was curing as if the demulsibility value
was closer to the high 80’s. The contractor’s
superintendent said that they are going to apply
a cationic quick setting fog seal in the next day
or two and finish up with striping the following
week. All preliminary indications are showingthat both the manufacturer and contractor
were very satisfied with how the CRS-2M
chip seal emulsion performed and they arelooking forward to seeing how it withstands a
Midwestern winter.
Redicote C-580, which is now available globallygives the highest emulsion viscosity comparedto most of the CRS emulsifiers in the market
which enables emulsion producers to use theminimum binder content to meet emulsion
viscosity specification resulting in cost savings.
In addition, Redicote C-580 can give a fasterbreaking system in chipseal/surface dressing
applications.

21

Use of adhesion promoters
to extend the life of asphalt
pavements in Vietnam
Moisture damage to asphalt pavements is a major issue since bitumen do
not have a natural affinity to siliceous aggregates and most of the aggregatesused for paving contain significant about silica as a main component.
Article by Naruesa Riwtong
If the mixes are not treated properly, in wet
conditions the pavement will experience early
failure within a year or two which is costly. Thisis due the fact that the roads have to repaved
often as the pavement do not last for the fullservice life they were designed for.
Vietnam is promoting the use of adhesion
promoters in asphalt mixes, to maintainadhesion, to prevent stripping thereby extend
the lifespan of asphalt pavements., Edstachemteam representing Nouryon worked closelywith customers providing technical support
and formulation guidance during the testingprocess. They also worked with end users incoming with proper storage conditions for theadhesion promoters. Edstachem did extensive
amount of work to promote the use ofadhesion promoter in spite of Covid-19 related
issues.
Extensive testing was done by independent
laboratories to establish the efficiency ofvarious adhesion promoters. They are happy
to announce that our product Wetfix BE, aheat-stable adhesion promoter for bituminous
binders was chosen after testing with products
from several suppliers.

22

The mixes were evaluated with and without
Wetfix BE by static immersion test and boilingwater tests according to Vietnam standards.
For the static immersion tests 50 grams ofunwashed aggregates were coated with 3.54.0 grams of hot bitumen and the mixes were
subjected to the static immersion tests at 60°C
and observed over a period of 3 days. Bitumen
was treated with various dosage of Wetfix BE
ranging from 0.3% to 07% by the weight of thebitumen.

Summary of static immersion test results
Wetix BE dosage %% retained coating

Control

20

0.3

75

0.5

90

0.7

100

The mixes at a Wetfix BE dosage of 0.3% was
evaluated after 5th day by the static immersion
tests. It still maintained a retained coating of
70% after the 5th day.
In the boiling water test the mixes were
subjected to boiling for 15 minutes according toVietnam standards.

This big win with Edstachem is the first stepwhich allow us to supply adhesion promoter
that will ensure long lasting asphalt pavements
in Vietnam. Edstachem Group is a joint venture
established in August 2006 between Malaysianand Vietnamese partners. They mainly focus on
distribution of industrial chemicals and additives
to Coating, Plastics, Rubber, Performance
Chemicals, Food and Feed industry.

Summary of boiling water test results
Wetix BE dosage %% retained coating

Control

20-30

0.3

75-80

The static immersion test and the boiling water
test showed that a small dosage such as 0.3% ofWetfix BE by the weight of the bitumen greatly
improves the retained coating and without theuse of Wetfix BE very little retained coating isleft. This clearly shows that without Wetfix BE
treatment the mixes will have severe stripping or
moisture damage problems in the field resulting
in early pavement failures.

As one of the fastest growing economy in
ASEAN, the rising population in Vietnam’s major
cities has strained the existing road network andfar exceeded maximum capacity of the existing
roadways. Vietnam with only 20 per cent of
the country’s national roads paved and has
approved $14bn plan to build a 1372km highway
by 2030. Vietnam does has have a huge growthin the infrastructure construction sector.

23

Conferences andAsphalt schools
24

High turnout for the first everNouryon virtual Asphalt school
webinarWe held the first Asphalt applications virtualschool for our customers from March 2-4.
This was a three-day 3 hour event each day
and was mainly meant for customers from theAmericas, but significant number of customers
participated from other regions in spite of thetime difference. There were 309 registrants
and 237 actual participants which is record
participation compared with our in-person
events with a maximum attendance of 90
personnel.
The Asphalt school has been a tradition thatbrings together our customers from around theworld for a few days to learn everything about
our asphalt applications and products as well as
hot topics in the asphalt industry. Over the years
several thousand personnel across the world
have benefited from our trainings and seminars.

Keeping the tradition alive
This year, we chose to hold our North American
Asphalt school as a virtual event due to
Covid-19 restrictions. We have experienced thisas one of the most effective ways to be in touchwith several of our customers in a matter of afew days. We not only educate our customers
about various aspects of asphalt applications
and new developments but also learn fromour customers about their needs and priorities.
During the in-person event for North America
we have two half days of lab demonstrations
which was replaced with suitable videos. In
fact, the videos provided close-up views of
the demos for the participants. During theschool, we focused on several aspects ofvarious asphalt applications with an emphasison emulsion applications. This year, customer
engagement was at an all-time high which wasevident based on the number of participantsfrom various regions and number of questions
asked during the panel discussion sessions.

25

Connecting with our customers
Apart from interaction with customers
during the panel discussion we have offeredinterested customers virtual meetings with ourtechnical and sales team. The feedback fromour customers was very encouraging withmany positive comments. We conducted asurvey after the event in which over 95% of allparticipants that responded, rated the course
as overall positive. In addition, over 95% of
the participants of the survey reverted thatthey would recommend this course to others
and commented that the right topics werediscussed during the school.

Virtual video demonstration of active
adhesion tests and soap solution
preparation

This event has generated a lot of customers’interest and due to ease of participation we areconsidering the virtual School/Webinar as oneof the important avenues to be in touch withour customers also in the future apart from
our in-person events. We are now planning forsimilar events for the other regions as well.
The presenters included not only several
members of the Asphalt Applications team
but also Dr. Codrin Daranga who was the
special guest speaker from Paragon Technical
Services. Linda Bergermo, our Marketing
Communications Manager was instrumental inorganizing and conducting the virtual event

A Nouryon virtual Asphalt school webinar
is scheduled for South East Asia, October
26-28, 10AM-1PM Bangkok time, based on
the reception and positive feedback that we
received from our customers.
26

Asphalt SEA participated in the
Academic seminar 2020
Dept of Highway, Thailand
The seminar was organized by the Departmentof Highway’s as a part of their Strategic Plan
2017-2021. The focus is on the developmentof highway systems to achieve complete
connectivity, accessibility and mobility of thecountry, develop Standards for good qualityof service and also to develop an organization
management system.

is considering specificying the use of adhesion
promoter mandatory in asphalt concrete (hotmix) in Thailand.

In 2020 we set up a booth to promote ourcompany and products during the conference.
The main products highlighted include
adhesion promoter such as Wetfix BE and ouremulsifiers. This was presented to the Ministryof Transportation and to the DOH staff which
consists of about 350 persons across Thailand.
During the conference we also interacted withmany customers including Tipco asphalt, Shell
Bitumen, Zolar asphalt and United Asphalt. We
had several discussions with them to develop
new asphalt emulsion formulations working
jointly together.
In 2021 the academic seminar was held at theend of August, and from us Naruesa Riwtong
was one speaker presenting the the benefit of
Wetfix BE. The title of the presentations is “Theadhesion enhancer between the aggregate andasphalt binder to increase the efficiency of thepavement and help prevent damage of asphalt
roads”.
We have sent samples of Wetfix BE to the DOH
Center Lab for their evaluation and trials. DOH
27

Inside Asphalt
applications28

Meet our
Asia technical specialists
Royan Xu
Royan has vast experience and technical knowledge
in paint and coatings additives, with more than 15
years of experience serving the architectural paint andconstruction Chemicals industry. He is currently theTechnical Service Lead for Paints and Coating in China.

Anju Gidwani
Anju has 15 years of experience in R&D and Technical
Services. She has worked in Paints & coating, Adhesiveand Asphalt Industries. She has a B.Tech in Surface
coating Technology. She is currently the Technical
Service Manager for Paint and Coatings including
Asphalt Applications for Indian Sub-continent region.

Fanny Siregar
Fanny has 7 years of experiences in the asphalt
industry working in the quality control laboratory. Her
background is in Civil Engineering. She is the TechnicalAsphalt specialist serving customers in South East Asia.

Jinjun Ni
Jinjun has 7 years of experiences in the asphalt industry
as technical service specialist serving customers in
China. His background is in Chemical technology andmanufacturing.

29

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Nouryon is a global, specialty chemicals leader.
Markets and consumers worldwide rely on our
essential solutions to manufacture everyday
products, such as personal care, cleaning
goods, paints and coatings, agriculture andfood, pharmaceuticals, and building products.
Furthermore, the dedication of more than 7,900
employees with a shared commitment to ourcustomers, business growth, safety, sustainability
and innovation has resulted in a consistently
strong financial performance. We operate in over
80 countries around the world with a portfolio
of industry-leading brands. Visit our website andfollow us @Nouryon and on LinkedIn.

All information concerning our products and/or all
suggestions for handling and use contained herein(including formulation and toxicity information) are
offered in good faith and are believed to be reliable.
However, Nouryon makes no warranty express or
implied (i) as to the accuracy or sufficiency of suchinformation and/or suggestions, (ii) as to any product’s
merchantability or fitness for a particular use or (iii) thatany suggested use (including use in any formulation)
will not infringe any patent. Nothing contained hereinshall be construed as granting or extending any licenseunder any patent. The user must determine for itself
by preliminary tests or otherwise the suitability of any
product and of any information contained herein(including but not limited to formulation and toxicity
information) for the user’s purpose. The safety of any
formulations described herein has not been established.
The suitability and safety of a formulation should be
confirmed in all respects by the user prior to use. The
information contained herein supersedes all previously
issued bulletins on the subject matter covered.
Products mentioned are trademarks of Nouryon
and registered in many countries.

nouryon.com

October 2021

Contact us directly for detailed productinformation and sample request
website | nouryon.com/markets/asphalt
email | asphalt@nouryon.com