Transport Africa Project
Studying climate effects on the pavements of low volume rural roads in the drier northern zone and the wetter southern zones in Ghana. It involves field studies to:
(i) measure water content and suction in low volume sealed roads,
(ii) measure in-situ strength within road pavements using Dynamic Cone Penetrometer (DCP)
(iii) observe field performance (rutting, crazing, potholes) with changing environmental conditions.
This is supported by laboratory characterisation of the materials (routine classification tests and CBR tests with suction measurement) and studies to investigate stabilised materials subject to environmental cycles (drying and wetting) to determine soil water retention properties and strength properties.
There is close collaboration with the other project partners for developing a complete picture of climate responses on road and rail construction projects, bringing together data from different climatic zones in Ghana, South Africa and Tanzania.