feedback to rpf – sans 308 review process
DESCRIPTION
Feedback to RPF – SANS 308 Review Process. Johan Muller Road Pavement Forum Task Team Leader. Feedback to RPF - SANS 308 Review Process. Meeting held 15 November 2007 Agenda. Feedback to RPF - SANS 308 Review Process. SectorCompanyName Primary ProducerSaprefMike Zacharias - PowerPoint PPT PresentationTRANSCRIPT
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Feedback to RPF – SANS 308 Review Process
Johan Muller
Road Pavement Forum Task Team Leader
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Feedback to RPF - SANS 308 Review Process
• Meeting held 15 November 2007
• AgendaItem
Topic Responsibility Timing
1. Welcome/Background Johan Muller 13h30
2. Review process to date Trevor Distin 13h45
3. Proposed specification changes Jacques van Heerden 14h00
4. Discussion and recommendations
All 14h30
5. Formulation of feedback to the RPF
Johan Muller 15h30
6. Closure of meeting Johan Muller 15h45
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Feedback to RPF - SANS 308 Review Process Sector Company NamePrimary Producer Sapref Mike Zacharias
Natref Jacques Van HeerdenEnref Daniel MashatolaCalref Simon Coe
Primary Marketer Masana Thomas PringleMasana Des O’BrienShell Bob Hornsey
Total Basil Jonsson
Sasol Pieter Goosen
Chevron Chris ViljoenSecondary producers Colas Kobus Louw
Tosas Johan MullerClients SANRAL Dennis Rossmann
GPTRW Elzbieta SadzikApplicators/contractors Spray Pave Kevin Spence
Tar Spray Robin Dryburgh
Roadmac Surfacing Kevan RocherConsultants Vela VKE Arthur Taute
Vela VKE Simon KotzeWSP SA Douglas JuddCSIR Adrian Bergh
Frank Netterberg
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Feedback to RPF - SANS 308 Review Process
BACKGROUND
• LAST REVIEW 1971• 2004 CAPSA ID ENVIRONMENTAL NEED TO
DISCONTINUATION OF TAR PRODUCTS• 2006TAR PRIMES AND PRE-COATING FLUIDS DISCONTINUED• SASOL CARBO-TAR CLOSED JUNE 2007
• MC 30 DOES NOT PENETRATE AND DRY QUICK ENOUGH (ESPECIALLY IN COLDER WEATHER)
• MC70 & MC800 NO LONGER MANUFACTURED DUE TO LOW MARKET DEMAND
• RC NO LONGER USED
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Feedback to RPF - SANS 308 Review Process
MC 30
DENSE BASESSTABILISED BASESPOOR PENETRATION AFTER 10 DAYS
ESPECIALLY IN COLDER WEATHER CONDITIONS
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SANS 308
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Feedback to RPF - SANS 308 Review Process
NEW DEVELOPMENTS
• DUE TO PROBLEMS ASSOCIATED TO POOR PENETRATION AND LONG DRYING TIME R&D FOLLOWED
AIM: FIND ALTERNATIVES THAT PERFORM BETTER THAN MC30
• PRODUCT MUST BE MANUFACTUREDPREFERABLE AT PRIMARY PRODUCER LEVEL TO ENSURE:
1. CONSISTENT QUALITY2. SAFER PRODUCTION ENVIRONMENT3. PROTECT WORKERS4. ENSURE GOOD GOVERNANCE
5. NO HEATING REQUIRED
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The effect of temperatureAverage Temperature Variation during OCTOBER 2006
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
AIR SHADE
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
ROAD SHADE
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00AIR SUN
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
ROAD SUN
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
Time
Tem
per
atu
re (
°C)
min
max
average
AIR AIR
ROADROAD
SHADE
SUN
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Properties of Cutback Bitumen MC30
PROPERTY UNITS LIMITS TEST METHOD NOTE
ASTM Other
Brookefield Viscosity @ 60 °C mPa.s 25 – 60 D4402 Used as field test
Kinematic Viscosity @ 60 °C cSt 30-60D2170/0
1Used by refineries only
Flash Point °C 38 min D93 Safety requirement
Water, % by mass or vol 0.2 max
Density at (60) ?? °C kg/l ?? ?? ???
Distillation @ 101.325 kPa abs D402/02
Distillate % (v/v) of total distillate up to 360 °C
up to 190 °C vol % 0-15
up to 225 °C vol % 15-60
up to 260 °C vol % 50-85
up to 316 °C vol % 80-100
Residue From Distillation to 360 °C ( by difference)
vol % 50 min
Viscosity @ 60 ºC on residue from distillation
Pa.s 30 min D4402 To replace penetration test
Spraying Temperature °C 45 – 65 Guideline for applicators
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Properties of Cutback Bitumen MC10(introduction of a new low viscosity primer)
PROPERTY UNITS LIMITS TEST METHOD NOTE
ASTM Other
Brookefield Viscosity @ 60 °C mPa.s 6 - 20 D4402 Used as field test
Kinematic Viscosity @ 60 °C cSt 10-20D2170/0
1Used by refineries only
Flash Point °C 38 min D93 Safety requirement
Water, % by mass or vol 0.2 max
Density at (60) ?? °C kg/l ?? ?? ???
Distillation @ 101.325 kPa abs D402/02
Distillate % (v/v) of total distillate up to 360 °C
up to 190 °C vol % 0-20
up to 225 °C vol % 20-70
up to 260 °C vol % 60-90
up to 316 °C vol % 80-100
Residue From Distillation to 360 °C ( by difference)
vol % 40 min
Viscosity @ 60 ºC on residue from distillation
Pa.s 30 min D4402 To replace penetration test
Spraying Temperature °C 10-30 Guideline for applicators
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MC Viscosity Curves
1.0
10.0
100.0
1000.0
10000.0
100000.0
0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 110.0 120.0
Temperature (°C)
Dyn
amic
Vis
cosi
ty (m
Pa.
s)
MC10 MC30 MC3000
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New Spec Developments Based on Literature Survey of State of Practice
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COMPARISONS UNDER CONTROLLED CONDITIONS
MC30 @ 0.8 ℓ / m2 MC30 @ 0.5 ℓ / m2
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COMPARISONS UNDER CONTROLLED CONDITIONS
IBE @ 0.8 ℓ / m2 IBE @ 0.5 ℓ / m2
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COMPARISONS UNDER CONTROLLED CONDITIONS
MC10 @ 0.8 ℓ / m2 MC10 @ 0.5 ℓ / m2
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COMPARISONS UNDER CONTROLLED CONDITIONS
An unstable
emulsion prime
@ 0.8 ℓ / m2
Another unstable
emulsion prime
@ 0.8 ℓ / m2
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COMPARISONS UNDER CONTROLLED CONDITIONS
Stable
Tosas QDP
@ 0.8 ℓ / m2
MC 15 @ 0.8 ℓ / m2
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Feedback to RPF - SANS 308 Review Process
Current Status – MANUFACTURING • ONLY NATREF manufactures MC10• OTHER LOCAL PRIMARY PRODUCERS
– Volumes driven– Storage tanks is an issue
• INVERT BITUMEN EMULSION AVAILABLE• EMULSION PRIMES NOW ALSO USED MORE
EXTENSIVELY
THIS TASK TEAM ONLY LOOKS AT THE CUTBACK SPECIFICATION
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Feedback to RPF - SANS 308 Review Process
Current Status – PRIME APPLICATIONS
– Issues associated to Priming – Dr Netterberg• CTB
– curing - cementation process– Carbonisation
– Dense crushed stone bases• Penetration requirement?
– ETB – no prime required only tack?– TAKE COGNISANCE OF:
• DE-LAMINATION / DEBONDING - Prof Hugo
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Feedback to RPF - SANS 308 Review Process
Task team proposes to the RPF– Introduce MC10 product on TRIAL BASIS– NO AMENDMENT TO SANS 308, YET! – DEVELOPMENT OF A PRIME MATRIX
• DIFFERENT PRIMES• DIFFERENT BASES• EFFECT ON CURING
• BEST PRACTICE GUIDELINE IN PROCESS OF DEVELOPMENTInitiative of major client bodies – Mr Rossmann
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Feedback to RPF - SANS 308 Review Process
Acknowledgement & Thanks
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Zero Tolerance for Speeding and trucks driving in fast lanes this December