project’ s engineering design and the capability of the asphalt plant. Warm mix asphalt— a technology that has gained acceptance globally because of its environmental and other benefits— can make use of a significant percentage of recycled material. In May 2016, the Road Pavement Forum in South Africa approved a resolution to scope guidelines for the inclusion of secondary materials in roads.
According to Mhlongo et al.( 2014), RAP is one of the most recycled materials in the world. However, studies conducted in Europe and the US show that while 80 % of the recycled material is reused in the construction of roads, strict regulation often allows for a maximum of 50 % RAP in the production of new hot mix asphalt( HMA) mixtures.
Road Pavements Forum
The South African Road Pavement Forum( RPF) was established in August 2000 to provide a forum for sharing and debating road-related matters relevant to the South African roads industry.
The RPF makes provision for wider representation and participation from the broader roads industry, particularly urban and provincial authorities, tertiary institutions, and contractors, and also allows for broader regional representation. RPF objectives include:
• Providing a perspective of overarching strategic issues as it affects pavement engineering;
• Promoting best practice;
• Co-ordination and linkage with other groupings;
• Establishment of task groups with specific national objectives;
• Provision of sufficient time for participation / discussion / advice and for social interactions;
• Dissemination of new technologies;
• Provision of a forum for acceptance of technological changes; and
• Provision of a forum for interaction between theory and practice and for identification of technology development needs.
Pixabay
The drive to increase the use of recycled materials in construction and road building, coupled with the requirement to decrease CO 2 emissions, has led to increasing focus on recycled or reclaimed asphalt paving( RAP).
28 _ QUARRY SA | NOVEMBER 2017