Bitumen emulsions for chipsealing offer some significant advantages over hot bitumen cutbacks in terms of safety, total energy use, greenhouse gas emissions and reduced risk in damp and cool environments. Polymer-modified binders (PMB’s)extend the range of engineering materials available to contractors and designers to solve many of the practical road-surfacing problems that arise due to such things as cracked pavements, high surface stresses and wide temperature ranges. However, the ways that these particular materials behave, both when applying them and in service on the road, are markedly different from conventional bitumen binders. It is essential that those designing and constructing surfacings incorporating PMB’s or emulsions, have a good understanding of the material properties and in particular the limitations that these place on construction methodology and timing. The course introduces the materials, looks briefly at manufacture and covers properties in detail with a strong emphasis on how this influences application techniques and on-the-road performance separately for emulsions and PMB’s. Guidelines are given to assist contractors to minimise the many risks associated with the use of these materials and show how to plan and successfully carry out this type of work. Effects on design are noted briefly.
Topics include:
- Manufacture, properties and how they work
- Factors affecting performance
- Storage, handling, sampling and testing
- Uses, limitations and safety issues
- Planning the work - special preparations
- Potential pitfalls
- Obtaining good adhesion with PMB's
- Chipseal and SAMI construction considerations
- Effects on chipseal design
- PMB’s in Hot Mix Asphalt
- Trouble-shooting
On completion of this course participants will have the knowledge to:
- Understand basic bitumen emulsion behaviour and how to handle it properly
- Understand the basic principles of polymer modification of bitumen binders and how to handle properly
- Advise on when to use or when not to use emulsions or PMB’s
- Make appropriate adjustments in chipsealing techniques to successfully apply emulsions and PMB’s
- Understand the need for appropriate chipseal design adjustments for emulsions and PMB’s
- Understand the practical effects of PMB’s in Hot Mix Asphalt
National Qualification information:
This course may be used to contribute towards the theoretical requirements the following unit standards:
17670 Demonstrate knowledge of hot polymer-modified binders and their use in chipseal construction
17671 Design chipseal surfacings using polymer-modified binders
17672 Demonstrate knowledge of the use of polymer modifiers in hot mix asphalt production and construction.
21666 Explain the properties, selection, and effects of polymer-modified binders in hot mix asphalt
17673 (expiring) Demonstrate knowledge of the use of polymers in hot-mix asphalt design
17674 (expiring) Demonstrate knowledge of the use of bituminous emulsions in chipseal construction
17675 (expiring) Demonstrate knowledge of the use of bituminous
emulsions in chipseal design
Who Should Attend:
All staff involved in the supervision or design of bitumen emulsion chipseals; polymer-modified binder chipseals; stress-absorbing membrane interlayers; polymer-modified hot-mix asphalt mixes.
Cost:
$405.00 per person + GST (Minimum numbers apply before a course is confirmed)
Presenter Information:
Barry Gundersen has over 35 years engineering and management experience in the road surfacing industry on both sides of the Tasman. He was National Technical Manager for Bitumix (NZ) for 15 years before setting up his own consultancy in 1995, specialising in road surfacings. Barry has been a visiting lecturer at Auckland University for 10 years and also runs training courses for the Asutralian Asphalt Pavement Association.
Further Information
For further information please contact Jan Kivell | 
