oa Civil Engineering = Siviele Ingenieurswese - Geosynthetics - from product to technology in road rehabilitation : geotechnical engineering

Volume 24, Issue 3
  • ISSN : 1021-2000



Before the launch of the new (at the time of writing), extensive research was undertaken to evaluate current road pavement material performance (design versus long-term actual performance) in the development of new materials. However, very little interest was shown in a technology which has been proven to benefit pavements by an unequalled value of up to 10 times normal traffic load, thereby allowing a reduction in layer thickness of up to 50%. This means a Category C (ES-0.01 to 0.1) road becomes a Category B road. Applying this technology greatly reduces the cost of construction where a G1 or a cement-stabilised material would have been used.

This technology, which is known as geosynthetics, has a record of more than 30 years of proven results and efficiency in practice. Some new materials currently used in roadworks do not have proven records over such a time span. Although currently classified as materials or products, it is increasingly believed that geosynthetics in fact represent a new technology. Geosynthetics technology is the result of thorough research, field tests and calibration towards the development of a strongly-based formulation for designing.
Geosynthetics technology was recently successfully used in a road rehabilitation project currently under construction near Glentana in the Southern Cape.

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