Strength-mineralogy interaction on weathered mudrock of Semanggol formation / Mohamad Hisam Kamaruddin

In civil engineering, a comprehensive study of rocks and its properties is crucial to investigate and characterize the behaviour of rock when undergoes multiple loading and stress. Mudrocks from Bukit Katil Kedah, a part of Semanggol formation were characterized for physical, mechanical and mineral properties. The analysis involved the influenced of weathering degree and mineral composition. Six samples were collected and studied. The result show the degree of weathering influenced the physical and mechanical properties of mudrock. The sample with low porosity and high density possessed highest uniaxial compressive strength and slake durability index of 11.03 MPa and 91.43% respectively. X-Ray diffraction revealed two of the sample tested were consists of goethite and quartz. The sample presence with goethite is higher in strength and durability compare to sample consists of quartz only due to the cementation effect and denser minerals.