Effect of Freezing-Thawing Cycles on the Physical and Mechanical Properties of Some Sedimentary Rocks Located Near Mosul City

Abstract

This study is aimed to investigate the surfacial deterioration of some common sedimentary rocks near Mosul city as a result of freezing-thawing cycles on physical and mechanical properties of two types of Limestone denoted as (L1 and L2), Sandstone (S) and Mosul Marble (M). Physical and mechanical tests include; uniaxial, triaxial compression tests, point load test and the indirect tensile strength(Brazilian test) have been performed on both the fresh specimens and the specimens subjected to a number of freezing-thawing cycles (5, 10, 15 and 20). Test results showed that the freezing and thawing is a process of physical deterioration, a significant reduction in different percentages in uniaxial and triaxial compressive and tensile strength was observed in all the rocks tested. A little variation was observed inthe slaking durability indices (IS-D) of (L1, L2 and M) rocks among three conducted cycles at fresh state, while (S) rock showed high percent loss of about 45.81% in its durability. On the other hand, the water absorption percent of the tested rocks showed a clear increase with the increase of number of freezing-thawing cycles.