Sabkha is essentially a carbonate sand containing varying proportions of evaporitic minerals and is found in the salt flats of the arabian peninsula. This report discusses the highway engineering properties and uses of the material and compares its performance with that of similar saline materials in other arid areas of the world. The manner in which the evaporitic minerals contribute to the performance of the material in road construction is not fully understood and in order to find out more about their influence on the performance of sabkha road bases, a fullscale experiment has been constructed to study the relative performance under traffic of three different sabkhas used as road bases under a thin bituminous surfacing.

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