Asphalt  mongolian
Upcoming SlideShare
Loading in...5
×
 

Like this? Share it with your network

Share

Asphalt mongolian

on

  • 1,078 views

 

Statistics

Views

Total Views
1,078
Views on SlideShare
1,078
Embed Views
0

Actions

Likes
0
Downloads
9
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • Asphalt is placed by paver with depth controlled by paver crew Picture shows small paver New asphalt in foreground
  • Truck, paver, roller all working together End Peter
  • See water been sprayed to prevent pick up
  • The aggregate component is made up of both fine and coarse aggregates. Coarse aggregates are defines at this that are large enough to be retained on a 4.75mm sieve. Fine aggregates are those that pass this sieve but are larger than 0.075mm Less than the 0.075mm sieve is deemed to be ‘filler’ material Aggregates need to from a rock source that produces hard and durable stone and needs to be clean and washed before being used in asphalt mixes. VicRoads Standard Specifications 407 and 831 specify the various requirements for rock such as grading requirements for coarse, fine and filler materials, rock types, and other various properties.
  • Filler materials are any materials that are smaller than 0.075mm. These can include Natural or manufactured sand Crusher dusts – a by product of crushing rock into aggregates Hydrated lime Slag or ground granulated blast furnace slag which is a by product of steel manufacture Fly ash – a by product from the combustion of coal Ground limestone Cement Kiln dust – a by product of cement manufacture where the dust us collected from the flue gasses during the manufacture process. The actual filler material will vary from mix to mix and be dependant on the mix design and available materials.
  • Use of Asphalt Asphalt may be used as a structural part of the pavement – deep lift asphalt, typically >150mm depth The depth and type of asphalt are designed into the pavement to provide strength, stiffness, and resistance to deformation – rutting Asphalt may be used as only the wearing (top) surface of the pavement – typically <40mm VicRoads use includes asphalt patching to 150mm depth Asphalt patching is quick and long term – less traffic disruption
  • Hot asphalt normal VicRoads resurfacing and pavement works cold asphalt and warmix patching and regulation material for maintenance patrols premix patching and pothole repair material for maintenance patrols Different types of asphalt wearing surfaces; DGA standard wearing course – most used asphalt SMA increased texture and rut resistance for sig ints and high speed areas (>80kph) OGA increased texture and free-draining to reduce water spray from congested, high speed sites, reduced traffic noise Eastern Fwy and Western Ring Rd UTA UTOGA, PLCS, thin asphalt for increased texture, low noise, for flexible sites, midblock, not sig int RGG regulation works, asphalt used to correct shape loss of pavement, especially in small areas Sizes PMB Samples of different asphalt types Expensive typically $12-20/m2 when bought in large volumes costs vary across the State according to usage, quantity and distance to site
  • Hot asphalt normal VicRoads resurfacing and pavement works cold asphalt and warmix patching and regulation material for maintenance patrols premix patching and pothole repair material for maintenance patrols Different types of asphalt wearing surfaces; DGA standard wearing course – most used asphalt SMA increased texture and rut resistance for sig ints and high speed areas (>80kph) OGA increased texture and free-draining to reduce water spray from congested, high speed sites, reduced traffic noise Eastern Fwy and Western Ring Rd UTA UTOGA, PLCS, thin asphalt for increased texture, low noise, for flexible sites, midblock, not sig int RGG regulation works, asphalt used to correct shape loss of pavement, especially in small areas Sizes PMB Samples of different asphalt types Expensive typically $12-20/m2 when bought in large volumes costs vary across the State according to usage, quantity and distance to site
  • Added by CS
  • Dense graded asphalt as the name suggests is a dense asphalt made up of Binder, fine and coarse well graded aggregates, and filler materials
  • Hot asphalt normal VicRoads resurfacing and pavement works cold asphalt and warmix patching and regulation material for maintenance patrols premix patching and pothole repair material for maintenance patrols Different types of asphalt wearing surfaces; DGA standard wearing course – most used asphalt SMA increased texture and rut resistance for sig ints and high speed areas (>80kph) OGA increased texture and free-draining to reduce water spray from congested, high speed sites, reduced traffic noise Eastern Fwy and Western Ring Rd UTA UTOGA, PLCS, thin asphalt for increased texture, low noise, for flexible sites, midblock, not sig int RGG regulation works, asphalt used to correct shape loss of pavement, especially in small areas Sizes PMB Samples of different asphalt types Expensive typically $12-20/m2 when bought in large volumes costs vary across the State according to usage, quantity and distance to site
  • Discuss Slide Aggregate includes coarse aggregate, fine aggregate and fillers.
  • Mix designs are undertaken by the Asphalt production company The process of Asphalt Mix design involves the choice of aggregate type, filler, combined aggregate grading, binder type and determination of binder content to optimize the engineering properties of the asphalt mix.
  • Once the ‘Ingredients” are determined Small samples of the proposed mix are prepared in a lab The volumetric properties of the mix are determined followed by mechanical testing of the mix to determine its general performance characteristics. Once it has been determined that the ‘recipe’ will produce a satisfactory mix, based on the volumetric properties and mechanical testing it can be Registered and is ready for production. There are specific test methods and Australian standards that cover the methods and procedures for the design and testing of asphalt mixes.
  • Database is important because this is how VicRoads control the basics of asphalt quality
  • Auditing of asphalt production plant specialised auditing by GeoPave and VicRoads staff can come too! Includes: General Requirements : Plant capacity. Compliance with safety, fire hazard, environmental and land use requirements. Raw material storage quantities adequate for continuity of production. Sampling of raw materials. Aggregate storage – separation, identification and prevention of contamination. Stockpiling and handling of RAP Filler storage. Binder storage, including temperature control of binder tanks. Temperature of binder supply. Binder discharge sampling. Binder heating temperature. Aggregate feeders. Adjustment of feeders. Calibration of feeders. Purchaser access to plant during operation. Batch Processing : Aggregate dryer, including moisture content of dried coarse and fine aggregate. Temperature of mixed material. Temperature of aggregate discharge from dryer. Hot aggregate screening: no of bins operation of bins effective overflow device low level indicator sampling device Weighing of materials. Automatic batching - visual mass indicators. Plant access to standard test weights for calibration. Binder discharge into mixer. Mixing time. Discharge temperature of mix. Discharge method and minimisation of segregation. Continuous Processing: Feeding of cold aggregate – warning of lack of aggregate flow. Drying and heating. Mixing: automatic burner controls mixing temperature moisture control Prior to Start Up : Check sufficient quantities of quality raw materials ready for manufacture without contamination of stockpiles or binder type. Check bins filled; feeders clear and set; cold feed conveyors clear, free and tracking. Check dryer working; hot elevator free; buckets intact; screens sound and running smoothly; pugmill / mixer operational. Check binder temperature. Start Up/During Production : Check feeders, fans, conveyors, drum, readouts, hoppers, storage, weigh bins and burner operation. Check feed rate matches production rate - balance feed rate to moisture content and temperature of mix. Check temperature variations of binder, hot aggregate and mixed asphalt. Check clean omission from stack. Check no contamination of mix types particularly during change over of mixes. Shut Down : Check further production needs prior to shut down. Check uniform run down of materials. Check no material in screen house overflow; oversize material in reject bin; spillage of cold feed or asphalt. No filter bag damage in bag house and conveyor, dryer, hot elevator, screens, hot bins, weigh hopper, pugmill clear of all material. Check stock levels remaining. Check any plant components that malfunction during production.
  • Checking the mixed asphalt in the lab Quartering the sample after sampling, this ensures a uniform well distributed sample is analysed. Accreditation Laboratory testing accreditation status displayed and proficiency testing is current. Control of documents and data . Copies of test methods available and current. Recording of samples up to date and complete. Laboratory environment Personal protection equipment used. Relevant MSDS available. Compliance with MSDS or laboratory safety rules. Laboratory Staff Training records show that technicians have been assessed as competent and proficient. Inspection and testing Correct test procedures followed and accurately recorded. Non-conformances System followed for recording and corrective action for all non-conformances including use of Business Improvement Reports. Calibrations Check that calibration files are maintained and current for all relevant laboratory test equipment.
  • COP 500.22 Appendix D and 500.01/ section 408 Table 407.021
  • COP 500.22 Appendix D and 500.01/ section 408 Table 407.021
  • Blackburn Road, south of Highbury Rd, medium traffic, midblock, 60kph
  • DVH and Wellington, 80kph, heavy traffic
  • WPH and Thompsons Rd, heavy traffic, 80kph
  • Residential roundabout
  • FGR 80kph heavy traffic
  • Eastern Fwy at Springvale Rd
  • DVH SBC 70kph
  • WPH OBC 100kph
  • WPH IBC 100kph
  • This is a list of information tips, hints and information that will lead to an improvement to your road surfaces. Each of these and other are continually being updated and added to.

Asphalt mongolian Presentation Transcript

  • 1. Asphalt PrinciplesFebruary 2012
  • 2. Course Objectives To provide participants with an overview of asphalt surfacing types and their application
  • 3. Learning Objectives Participants will develop an understanding of: – Asphalt surfacing design and selection – Asphalt principles and practice
  • 4. Course Outline The session will cover: – Basic Principles of Asphalt – Use and Types of Asphalt – Asphalt Mix Design – Asphalt Production – Treatment Selection
  • 5. Basic Principles of Asphalt Engineered material comprising of Bitumen, aggregate, filler and air voids. Has engineering properties that can be used for design. Asphalt is produced according to asphalt mix designs (recipes) based on raw materials Asphalt is typically produced as a hot material, approx 160oC, and placed as a hot material at >90oC
  • 6. 1. Basic Principles of AsphaltPerformance Requirements of Asphalt Resistance to permanent deformation (ie rutting) Resistance to fatigue Durable Workable (for placement) Good Skid resistance. Specialist mixes that have added performance properties such as low noise, low spray generation, or increased resistance to cracking or rutting
  • 7. 1. Basic Principles of Asphalt - Binder Binder is the ‘glue’ that holds all of the asphalt mix components together. Can be Class 170, 320, 600 or multigrade bitumen. Class 320 most commonly used Can include polymer modified binders to enhance the performance properties of the bitumen and is commonly used in high performance mixes such as SMA and OGA
  • 8. 1. Basic Principles of Asphalt - Aggregate Coarse aggregate ( larger than 4.75mm) Fine aggregate (between 4.75mm and 0.075mm) Less than 0.075mm material is called “filler” Aggregates need to be hard, clean and durable rock with minimal unsound stone VicRoads Specification 407 and 831 cover the various requirements for asphalt aggregates
  • 9. 1. Basic Principles of Asphalt - Filler Filler materials are particles that are smaller than 0.075mm. Can include – natural or manufactured sand – crushed material (crusher dust) – hydrated Lime, Slag, Fly ash, ground limestone, cement, kiln dust The actual filler materials vary between mixes and rely on the mix design and available materials
  • 10. 2. Use and Types of AsphaltUse of Asphalt Structural part of the pavement – deep lift asphalt, typically >150mm depth Wearing (top) surface of the pavement – typically <40mm Patching of failed pavement areas Regulation to improve ride quality and remove depressions
  • 11. 2. Use and Types of AsphaltTypes of Asphalt Hot asphalt, cold asphalt, warm mix, warmix and premix Asphalt for wearing surfaces Asphalt for structural layers Various sizes of asphalt mix -7mm, 10mm, 14mm, 20mm, 28mm Binders – Bitumen, Emulsion, Polymer Modified Binder
  • 12. 2. Use and Types of AsphaltTypes of Asphalt Different types of asphalt wearing surfaces – DGA Dense Graded Asphalt – SMA Stone Mastic Asphalt – OGA Open Graded Asphalt – UTA Ultra Thin Asphalt (UTA, Novachip) – RGG Regulation Gap Graded Asphalt
  • 13. Austroads Asphalt Guide
  • 14. 2. Use and Types of Asphalt Dense Graded Asphalt – Most common asphalt type – Dense, continuously graded aggregates and filler – Used for structural layers in asphalt pavements (Types SI, SS and SF) – Used for Wearing courses on both granular and asphalt pavements (Types H, V and HP)
  • 15. Dense Graded Asphalt
  • 16. 2. Use and Types of Asphalt Stone Mastic Asphalt – Uses gap graded aggregates with a larger proportion of coarse aggregates that interlocks give a strong interlocked matrix – Includes fibres and a Polymer modified binder – Used as a wearing course only – Provides a strong and robust surfacing that has increased resistance to rutting and cracking.
  • 17. Stone Mastic Asphalt
  • 18. 2. Use and Types of Asphalt Open Graded Asphalt – Wearing course only – Uses predominantly coarse aggregates and small amounts of fine material – Provides a mix with a high volume of air voids – Used as a textured, porous surfacing that assists with noise and spray reduction – Used almost exclusively on Freeways – Expected life up to about 12 years
  • 19. Open Graded Asphalt
  • 20. 2. Use and Types of Asphalt Ultra Thin Asphalt – Used as a wearing course only – Similar properties to OGA but to a lesser extent – Developed to be placed in thin layers (typically 25mm) – Used where an asphalt surface is desirable but levels are an issue, (Kerb and chanel or an as alternative to sprayed seal surfacing – Expected life 10-12 years
  • 21. Ultra Thin Asphalt
  • 22. 2. Use and Types of Asphalt Regulation Gap Graded Asphalt Primarily used as a regulation layer to even out surface roughness prior resurfacing Increased binder content and gap graded aggregate Has greater workability and can be placed in very thin layers and ramped or feathered out to zero depth
  • 23. Gap Graded Asphalt
  • 24. 2. Use and Types of AsphaltTypes of Asphalt Different types of DGA asphalt for structural layers – Type SI Structural Intermediate • Multipurpose for heavy duty pavements, or base course for medium duty pavements • Type SP Structural PMB (intermediate layer) • High resistance to deformation at very heavily trafficked intersections – Type SS Structural Intermediate for Stiffness • Stiffness layer for large scale heavy duty asphalt pavement – Type SF Structural Fatigue • Fatigue resistant base course for heavy duty pavements (must be covered by 100mm of other asphalt)
  • 25. 3. Asphalt Mix Design Mix design undertaken by Asphalt production company. Selection of “Ingredients” – Aggregate type – Filler material – Aggregate grading – Binder type & Content
  • 26. 3. Asphalt Mix Design Source : AAPA
  • 27. 3. Asphalt Mix DesignVicRoads Registration System Contractual requirement of all VicRoads Contracts that mix designs used on VicRoads works must be Registered. Mixes can be registered as: – General Mix • Complies with VicRoads Standard Specifications. – Non Standard Mix • Proprietary and other mixes that do not comply in all respects with the requirements of this Code of Practice but where successful field trials have been undertaken for a period of at least three years and the mix performance continues to be closely monitored.
  • 28. 3. Asphalt Mix DesignVicRoads Registration System – Experimental Mix – • A mix that does not comply with the requirements of this Code of Practice and for which there is little or no history of successful performance and requires more trials to be undertaken and monitored before it is registered as a Non Standard or Conditional mix. – Conditional Mix – • Mixes which do not comply in all respects with the requirements of Standard Specifications but which are considered appropriate for use subject to conditions attached to the registration.
  • 29. 3. Asphalt Mix DesignVicRoads Registration System – Superseded Mix • Superseded by another registered mix but details are retained for record purposes. – Withdrawn Mix • Withdrawn from use because of unsatisfactory field performance but details are retained for record purposes.
  • 30. 3. Asphalt Mix DesignVicRoads Registration System All mix designs reviewed and recorded by Technical Consulting and stored in a database. Registrations last for two years and must be renewed New mix designs required if any of the components change Mixes registered as General should only be used unless advice is sought from Technical Consulting. Database contains commercially sensitive information and should not be distributed.
  • 31. 4. Asphalt Production
  • 32. 4. Asphalt Production
  • 33. Batch Plant Figure from Austroads ‘Asphalt Guide, 2002’
  • 34. 4. Asphalt Production
  • 35. Drum Plant Figure from Austroads ‘Asphalt Guide, 2002’
  • 36. Mobile Drum Mixing Plant
  • 37. Binder Storage Tanks
  • 38. Cold Feed Storage Bins
  • 39. Mechanical Sampling Device
  • 40. Asphalt Laboratory
  • 41. Solvent Extraction
  • 42. Ignition Oven
  • 43. 5. Treatment SelectionWearing Courses DGA Type L very lightly trafficked pavements, <500AADT DGA Type N light to medium duty, <3000AADT DGA Type H heavy duty, >3000AADT DGA Type HP heavy duty, cracked area >3000AADT DGA Type V signalised intersections, roundabouts, >5000AADT
  • 44. 5. Treatment Selection Wearing Courses SMA improved crack resistance, high texture, rut resistance SMAN for midblock, SMAH for intersections OGA reduced water spray and noise, high texture high speed facilities, multiple lanes UTA increased texture, flexible, shorter service life
  • 45. Blackburn Road, midblock, 60kph,medium traffic, low HV
  • 46. Stud Road, intersection, 80kph,heavy traffic, 10% HV
  • 47. Westernport Highway, roundabout, 80kph,heavy traffic, 15% HV
  • 48. Holland Road,roundabout, 50kph, low traffic, low HV
  • 49. FGR, midblock,80kph, heavy traffic, 15% HV
  • 50. Sesame St, midblock,60kph, low traffic, low HV
  • 51. Eastern Fwy, midblock, 100kph,heavy traffic, 10% HV
  • 52. DVH, midblock, 70kph,medium traffic, high HV
  • 53. Westernport Hwy Road, midblock,100kph, medium traffic, high HV
  • 54. Westernport Hwy Road, midblock,100kph, medium traffic, high HV
  • 55. References Austroads/AAPA Work Tips (www.aapa.asn.au) APRG Technical Notes VicRoads Technical Notes Austroads – Pavement Technology Series – 4B: Asphalt Australian Standards VicRoads, Standard Specification for Roadworks and Bridgeworks