Chemical stabilizers and dust palliatives are used in road construction and maintenance to improve the characteristics and performance of available materials in terms of lower dust levels, improved riding quality, reduced gravel loss and improved all-weather passability. A research protocol for the assessment of road additives, entailing a product description, categorisation, laboratory screening, laboratory environmental and performance testing, field testing, data analysis and guideline preparation has since been developed. A certification body in South Africa has been approached with regard to developing a certification system, which is currently being finalised under the guidance of a steering committee with representation from road authorities, consulting engineers, product suppliers and academia. In this paper, the development of a research protocol and fit-for-purpose certification for road additives is discussed. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.
Samenvatting