Physical and Chemical Properties of Carbonaceous Shale and Their By= Product along Seputeh- Datu Gajah New Road

The carbQnaceous .shale of Batu Gl!iah ex!Xlriencing weathering and acid rock
drainage phenomenon doe to exposure to water and atmosphere during the
construction of the Seputeh - Batu Gajah new road. As a result, severe soil cancer
and land slide occur around the affected area. Sets of sample were collected
according to the weathering profile in order to determine the change of physical
and chemical properties of the carbonaceous shale before and after experiencing
weathering and acid rock drainage. Several experiments such as colour chart,
physical observation, X - Ray Diffiaction (XRD), X - Ray Fluorescence (XRF),
Scanning Electron MicroscoJXl (SEM), CHNS elemental experiment and density
calculation was carried out in order to meet the project objective. It is found that
the physical and chemical properties of the carbonaceous shale change during
weathering and acid rock drainage. The density gradually decreased whiles the
colour of the rock which dark becomes lighter. The carbonaceous shale which
initially hard becomes more brittle and porous as it weathered. The chemical
properties of the carbonaceous shale such as carbon and sulphur are significantly
decreases because the elements are leach out during the weathering and acid rock
drainage process. As a result, the change in physical and chemical properties due to
weathering and acid rock drainage are heavily affected the area which cause soil
cancer and land slide.
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