SABITA Manual 37 / TMH 5 gives detailed methods for taking samples of materials that need to be tested for...

SAT is pleased to introduce the 5th edition of Sabita’s Manual 5. This revision takes account of recent developments in...

Cutting edge technology and products are employed in the bituminous surfacing of South Africa’s roads. The industry prides itself on being up to date with the latest local and global wisdom in surfacing treatments. As practitioners it is up to each one of us to ensure that our knowledge remains relevant. To this end, the Society for Asphalt Technology has invited some of the country’s leading experts to unpack the latest guidelines on surface seals & Sabita Manual 40.

Asphalt (AC) in the 21st Century is very different from asphalt made 100 years ago. With binder modification, sophisticated aggregate crushing techniques, a plethora of additives and the introduction of nano technology, asphalt (AC) has rapidly become a “super-construction material”.

However, it still requires paving and compacting, and the technology in this activity has also modernised dramatically. The achievement of density of the asphalt layer is the subject of this webinar and the Society for Asphalt Technology invites you to attend and enjoy our webinar which addresses some finer details of how asphalt density is achieved in these modern times. See the presentation here…

Asphalt (AC) in the 21st Century is very different from asphalt made 100 years ago. With binder modification, sophisticated aggregate crushing techniques, a plethora of additives and the introduction of nano technology, asphalt (AC) has rapidly  become a “super-construction material”.

SAT was pleased to present to industry the Third Edition of TG2 for BSMs, incorporating 18 years of experience and new technologies. The first TG2 guideline was published in 2002 for foamed bitumen only and the Second Edition for BSMs in 2009.

This technology has now been implemented globally and the manual has been assembled using evaluation data from abundant project investigations and long-term pavement performance records. This has allowed the DEMAC materials classification system to be updated, mix design procedures to be overhauled and refined, and the Pavement Number method to be updated. At the same time, a mechanistic design function has been developed for BSM pavement structures.

Sasheen Rajkumar provides a global and local view, starting with a definition of RA and the historic context. He goes on to detail the asphalt recycling process, mix types, influencing factors, and issues around quality. What are the environmental and economic benefits and, importantly, the regulations around ownership and disposal of RA?

There are various mixing plants with different capabilities that can be used for asphalt mixes incorporating RA, as well as recycling batch plants. Herman Marais provides the information you will need. While the same basic types of mixing plants are used, modifications are required, and standard plants should not be used to produce asphalt with high RA content.

How to design a mix using RA – this paper has it all. Learn about mix selection from types to design considerations, getting the proportioning of new aggregate, new binder and RA right, tests to be conducted on RA samples, and the use of rejuvenators. Wynand Nortje closes off with advice on testing of the recycled asphalt mix.