Application Of Schmidt Hammer Rebound Test For Weathering Profile Classification Of Granite, Paya Terubong, Penang, Malaysia

Abstract

Weathering profile characterization is one of the significant information in the interpretation of the condition of rock. In addition, the tropical climate in Malaysia causes the deep–seated weathering phenomena of granitic rock. The identification of weathering profile of granite can be made using in–situ Schmidt hammer rebound test which is one of the non–destructive tests (NDT) that is widely used. In this study, the test is carried out on granitic rock in Paya Terubong, Pulau Pinang. Based on the study conducted, the value for each of weathering grade of granite can be identified. The value for fresh granite (Grade I) is greater than 55, slightly weathered granite (Grade II) is ranging from 35 – 55, moderately weathered granite (Grade III) is ranging from 17 – 35 and highly weathered granite (Grade IV) is less than 17. Completely weathered granite (Grade V) and residual soil (Grade VI) do not have any Schmidt hammer rebound values. This method can be used as a very useful method in the field to determine the degree of weathering of rock outcrops.