Smart Materials solutions are quite different to conventional layered road design using selected quarry materials with cement stabilization. In conventional road design, the materials used in road construction are specified as per AASHTO or ASTM2487 Soil Classification Chart and the classification system for design purposes in TG2 (2009). In South Africa the TRH14 classification is widely used. Road designs using these material specifications are based on Mechanistic-Emperical design data.
Smart Materials are purposely engineered to make use of insitu or materials that would normally be discarded as unsuitable for use in the upper layers of the road design.Insitu materials will vary from site to site and material properties can therefore not be characterized in a Mechanistic-Emperical manner.
It is therefore important to complete material testing and to establish performance characteristics, prior to completing the road design.
Polyroads have several professional consulting engineering specialists, including geotechnical experts that will assist partners, engineers, authorities or donors with the necessary material testing and internationally accredited road designs, using Smart Materials.
Road design tools includes pavement design using axi-symmetric finite element analysis. The designs includes designing the pavement model with various strains and stresses in order to achive optimal road design and simultaneously reducing construction costs.
Polyroads' engineering team can assist with;