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Technology - Delivery - Partnership Shell Sulphur Solutions

Sulphurs Place in CEFoundation PerformanceAssociation, Houston

Gary L. Fitts, P.E.SE Regional ManagerShell Sulphur SolutionsGarden Ridge, TX

Technology - Delivery - Partnership

DELIVERING INNOVATION TO YOUR ADVANTAGE Shell Sulphur Solutionshttp://www.shell.com/sulphur


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? N


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()

N , , 16 ,

A, C, , A

C, , A

A, C

10


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( I)

(H2O

4),

, .

, .

,

, , , ,

, , , , ,

, , , ,

, , , , ,

, , ,

,

, .


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( )

()

I


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B

H

C

CC

E ,

E


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A

, , ,

G


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H

M @ 275F (135C)

HMA

,

N ,

,


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?

F /D

E

/


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Solid pellets, ~ 97% sulphur

Includes plasticizers, compactionagent and fume suppressants

Can be stored on the ground or in silos

No concern with moisture during

storage

Blended with the mixture, not directlywith asphalt binder

Melts in hot-mix plant, disperses intomixture

Keep temperature below 285F


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E M

2025%

I ,

I /

N A


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B C F

D ( + B) :

, C B, % =

:

G=

F = (, 3040%) =

= G/G *

= = * F

= % =

*A lower ratio as low as 1.7 may be used for rich mixes.

( )[ ]

100

100


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Technology - Delivery - Partnership Shell Sulphur Solutions13

E C

A: = 5.3%

F= 40% (. 40% /60%B )

G = 2.00

G = 1.03 = 2.00/1.03 = 1.94

% = 5.3 100 (1.94) = 5.3 1.23*

100(1.94) (40)(1.941.03)

= 6.6%

%, %


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Technology - Delivery - Partnership Shell Sulphur Solutions14

E M G 5828, FG A

0

2000

40006000

8000

10000

12000

14000

1600018000

20000

0/100 30/70 40/60 50/50

Thiopave / Bitumen Weight Ratio

Mars

hallStability,

New

ton

s

Minimum MS-2, 75Blows = 1800 lbs

Marshall Stability increases with Thiopave content


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M C

0

2000

4000

6000

8000

10000

12000

14000

16000

Conventional Mix SEAM Mix

MarshallStabil

ity,

N

1 Day 14 Days

Thiopave

1800 lbs

>10% higher initially, over 80% higher after 14 days

Qatar Test Road Results


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-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0

0 5000 10000 15000 20000 25000

Cycle

RutDepth(m

m)

R4/R5 Stripping Inflection Pt.

= 8500 cycles

16

C H (50C)

O, HD HMA

Heavy Duty AsphaltHMA

Thiopave- ModifiedHMA

Example HWT Specification Criteria, PG 76-22:

(1) Colorado DOT: rut depth less than 10 mm

(2) Texas DOT: rut depth less than 12.5 mm


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HMA

C

HMA

HMA

C

HMA

C

A A (AA)

8000

Asphalt Binder: PG 58-28


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Technology - Delivery - Partnership Shell Sulphur SolutionsTemperature, C

HMA

M

C:

HMA

Thiopave-modified

Control

Frequency = 1 Hz


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L

,

,

()

G

M

L L

@

T = 30C


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10

100

1000

10000

100000

-6.00 -4.00 -2.00 0.00 2.00 4.00 6.00

Log Reduced Frequency, Hz

|E

*|,

ksi

0% Thiopave, 4% Design Va

30% Thiopave, 3.5% Design Va


40% Thiopave, 3.5% Design Va


M C (NCA)


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0

2000

4000

6000

8000

10000

12000

14000

16000

18000

25 Hz 10 Hz 5 Hz 1 Hz 0.5 Hz 0.1 Hz 0.01 HzTest Frequency

DynamicMo

dulus(E*)(MP

a)

0% SEAM 4% Design Va

30% SEAM 3.5% Design Va

40% SEAM 3.5% Design Va

E* F, 1


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F , O

1000

10000

100000

1000000

600 650 700 750 800 850 900 950 1000

Tensile Stress, kPa

N

um

bero

fCyc

les

toFa

ilur

Thiopave

Heavy-duty HMA


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Effect of Thiopave on Thermal Stress

Restrained Specimen Tests (TSRST) Results

Bitumen grade

70/100 100/150 160/220 250/330

Fracturetem

perature,

oC

-40

-30

-20

-10

0

Conventional asphalt mix

Sulphur modified asphalt mix

A Study of the Low-Temperature Properties of Sulphur Extended

Asphalt Mixtures , Strickland, Bouldin and Colange, CTAA 2008

Amount of modifed sulphur added, % mass

-10 0 10 20 30 40 50

Fracturetemperature,

oC

-35

-30

-25

-20

-15

-10

-5

0

control

70/100 Pen


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C

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

Crac

king

Te

mpera

ture,

C

Conventional Thiopave Binder LT Grade

PG46-34 PG52-34 PG58-28 PG64-22 PG58-28

300/400 200/300 150/200 80/100 80/100

Note: Thiopave Mixtures: 40% Thiopave/60% Bitumen


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F

SILO FEEDERBIN & BELT FEEDER

Developing a pneumatic feed system for Thiopave pastilles Best to feed them at/near baghouse fines return


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DOUBLE BARREL DRUM MIXER

COUNTERFLOW DRUM MIXER

DRUM MIXER WITH SEPARATECOATING MIXER

BATCH MIXING PLANT WITH RAPFEEDER

RAP BIN

BELTFEEDER

RAP BIN

Requires strict temperature

control

~ 135C (275F) is ideal


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H&E

N D

D


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H&E E HMA

ASPHALT HOT-MIX PLANT:

H2S & SO2 = 0 AT MIXER ANDTRUCK LOADING AREA

Six Hour Average, Oct. 2002


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H&E E

ASPHALT PAVER: H2S SO2

ABOVE SCREED (1): 0.9 PPM 0 PPM

OPERATOR PANEL (2): 0.1 PPM 0.3 PPM

AVERAGE LIMIT (2002 TLV): 10 PPM 2 PPM

2

1

2

1

Six Hour Average, Oct. 2002


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H&E E

H C G OC

Date and conditions Total VOCppbv

Aug 15: Downwind, 5m; Control

HMA produced @ 152C 214

Aug 15: Upwind, 5-m; Control HMA

@ 152C 257Aug 16: Breathing zone; Thiopave

mix produced @ 140C 98

Aug 16; Downwind, 5m, Thiopave

mix produced @ 140C 99


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G G

CO2

B (A)

D

(B C)


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A &

L

, H

B B

, ,

CC

I

M

!

D

285F!

D NO :

M

D


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O

B C.,C

F

NCA (2 )

L ALF (2 )

L

NCA, LC

C

H&E

B (C)

StructuralPerformance

Material Properties,Local Materials

Qs & As

Stay tuned,muchmore to come!


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C

,


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Thiopave-SulphurEnhancement for Asphalt

Mixtures

Gary L. Fitts, P.E.SE Regional Manager

Shell Sulphur SolutionsGarden Ridge, TX

DELIVERING INNOVATION TO YOUR ADVANTAGE

Shell Sulphur Solutionshttp://www.shell.com/sulphur

Thank you!

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