Abstract
With the view to exploring the methodology of tests and studies for the next fiscal year and the one after, a shear strength test by the portable direct shear tester was conducted with respect to four types of solid waste samples: (i) deposited industrial solid waste illegally dumped at a certain location in the Kanto Region, (ii) "solid waste mixture" coming out immediately of the initial screening process of an authorized intermediate treatment facility of construction-derived solid waste, (iii) "light-weight mass" coming out immediately of its pneumatic sorting process, and (iv) "demolition debris with high contents of sand and earth (20-mm mesh under)" coming out as residue of the sorting process. These four types of samples with varying water content and shear direction were tested for shear strength in 8 cases. To the extent the preliminary experiment was conducted with a vertical stress of 50 kN/m2 for every case, the shear strength of "light-weight mass" was lower than those of other sample types. The shear strength generally decreased when water was added in 50% by weight and varied depending on the shear direction.
