Abstract
Oyster shells in this research have function as both cement and fine aggregate substitution as well as provide aesthetic value on concrete materials. Types of shells observed in this research are: green mussels (Perna viridis. Linn), blood clams (Anadara granosa Linn) and scallops (Placuna placenta Linn). This paper compares performances of concrete materials made of three oyster shells on density, compressive strength and acoustical aspects consisting Sound Transmission Loss (STL) and Absorption Coefficient (α). Green material made of Anadara granosa Linn shell has the greatest compressive strength with the value of 200 kg/cm2. The acoustical tests show that the three materials have a range of STL between 6.3931 and 7.953 dB, while the greatest absorption coefficient is material made of Perna viridis shell with value of 0,05.Â
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