Presentations of Technical Events

Nico shares Roadlab’s expertise in this field, starting with tests currently used to determine material properties before treatment/stabilization/modification, followed by the properties…
Aggregate properties need to be clearly defined in terms of both specification and testing to ensure compliance. To support this, Ray Bonser…
This presentation explains what you need to know about base course problems and how to avoid the pitfalls. Get a grip on…
Reclaimed asphalt (RA) is the industry’s answer to environmental sustainability. Here you will gain an understanding of the use of RA from…
What are polymer modified bitumen and rubber modified binder? What do we achieve by modifying base bitumen? Get the answers and the…
Johannes Lambert covers all the bases in this detailed presentation, including the chemistry and refining of bitumen, classification and properties of bitumen…
The pros and cons of both standard and “new age” field and laboratory permeability testing methods. The author warns that an accurate…
Georges Mturi points out that about 30% of bitumen used in asphalt in South Africa is modified. In this paper he discusses…
Why the problems? What has changed? These are the questions Dennis asks and answers. Professional project management and quality engineering are essential…
The A to Z of sealing, starting with the history of specifications developed in SA and proposed changes. The presentation continues with…
Sasheen Rajkumar provides a global and local view, starting with a definition of RA and the historic context. He goes on to…
In this second presentation of the series, Jacques van Heerden continues with a definition of bitumen and explains classifications of bituminous binders…
Johan provides a detailed account, with focus on priming, tacking, selection of the right bonding agents, product comparisons and relevant r&d, quality…
For those who need a deeper understanding, it is all included in this detailed summary – versatility, water resistance, ductility, cohesion, adhesion,…
How to design a mix using RA – this paper has it all. Learn about mix selection from types to design considerations,…
Caroline Marais looks at the critical issues of quality control including heating of modified binders, tank management and handling; transportation hazards to…
Herman Marais introduces emerging technologies in bitumen modification including polymer modification (PMB), crumb rubber, micro filler and nanotechnologies. He concludes that PMB…
This presentation covers the essentials of binder testing in winter seals, with focus on the properties of cutback binders used in cold…
Find out what lessons can be learned from sealwork trials – from seal geometry to binder aggregate contact and adhesion, to temperature…
To optimize aggregate unit cost and quality, it is essential for quarries to adopt a systems based approach that considers all the…
Premature failure is a manmade phenomenon. For surfacing to perform properly, the G1 base needs to provide a well-knit aggregate mosaic. Kleyn…
Dennis Rossmann drives home the importance of an advance QA plan to agree responsibilities and verify sampling procedures. He goes on to…
Find out how an understanding of the complex geological aspects of aggregates can help you meet the required specifications. Robert Leyland breaks…
Sound HSE practices are essential in the handling of bitumen and bituminous products and this presentation gives us a good overview. Learn…
Since void content has a direct bearing on asphalt performance, the reliability of void content determination methods is key. Tafadzwa Mafuma looks…
A binder manufacturer discusses the impact of historic seasonal trends on availability of products and services, the characteristics of winter seal products,…
Ensure that the project mix materialises on site by sticking to some basic principles. This presentation enlarges on the basics such as…
Group Five Civil Engineering participated in winter seal trials on the N14 Section 7 between Kathu and Kuruman in the Northern Cape…
There are various mixing plants with different capabilities that can be used for asphalt mixes incorporating RA, as well as recycling batch…
Greg Reynolds details all the steps from milling and stockpiling to processing and optimal use of reclaimed asphalt.
Moisture is the greatest enemy of any asphalt layer. This presentation talks to the paradigm shift that is needed in design thinking…
All you need to know including current practices, international and South African trends and experience, embargos, different binders, feedback on stripping and…
A brief overview of this exciting new technology that is capable of modifying feedstock bitumen to produce multigrade bitumen, how it works…
Herman Marais provides a definition and discusses nanotechnologies in use and under development, as well as future opportunities. Of particular interest is…
Kim Jenkins talks us through the key factors, including various test results that help practitioners to make informed decisions. The presentation touches…
This presentation will give you the lowdown on methods for storing aggregate, techniques for moving aggregate, sampling techniques, moisture issues, and quality.…
A step-by-step methodology using existing statistical concepts as a screening and analysis tool to determine asphalt permeability. This paper shows how you…
What does “nano-technology” mean? What are the problems we need to solve in a South African context? Prof Jordaan takes us from…
Jacques van Heerden takes us through all the background we need to know about bitumen. Starting with the history of bitumen including…
If nanotechnology is new to you, this is a great A to Z explanation. You will get the background, definitions, FAQs, history,…
Dr Horak’s presentation explains the Bailey Method (BM) basis of packing analysis, the Dominant Aggregate Size Range (DASR) method and Binary Aggregate…
Steph Bredenhann summed up the Winter Seal Workshop held by SAT in April 2014 with some thoughts on the current scenario at…
Binder modification has become the norm as the performance limits of conventional bitumen have been reached. The author believes practitioners need to…

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