Durability is one of the most important engineering properties of weak and clay-bearing rocks. Weathering can induce a rapid change in rock material from initial properties to soil-like properties. The sensitivity of a rock type against weatherability is usually described by a durability parameter. This paper deals with the relationship between durability tests results and physical and mechanical properties such as water absorption, point load index, dry density and carbonate content. These tests have been carried out on 16 samples of marly limestone of Abderaz formation in the north east of Iran. The samples were subjected to 4 cycles of slake durability. The obtained results show that all tested samples have high to very high durability. Furthermore, the relationship between durability and point load is poor due to the granular texture in the samples. It seems that the calcium carbonate content of these samples is more related to the lime particles rather than the cement.

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