Pengaruh perlakuan alkali NaOH terhadap kekuatan tarik dan fatik kayu merbau

Merbau wood is a type of tropical hardwood class I-II having resistance to humid weather and so that the widely used in many building constructions, such as bearing houses bridges. In addition, this can be raw material for furniture because it has high durability against fungi. The tensile test specimen (ASTM D4761) fatigue E466) were made by turning smoothing surface with sandpaper. Furthermore, alkaline treatment using various concentrations NaOH solution (5%, 10% 15%) was applied merbau immersing all specimens 2 h continued drying process at 60 °C 5 h. Tensile tests axially carried out MTS Landmark 100 kN. results showed strength 5%NaOH alkali higher (s max = 202.8 MPa) compared soaked 10%NaOH ult 149.7 15%NaOH 129.9 MPa). Likewise, life longer than solution.