2021 Volume 77 Issue 2 Pages I_319-I_328
This study aims at obtaining basic knowledge on melting and solidification behavior of a lunar soil simulant, FJS-1 by isotropic and surface heating. The effect of heating history, soil grading and initial packing density on the mechanical properties of the solidified materials was examined. It was found that (1) the higher temperature, the longer heating time, the finer material, the denser packing density deduce harder and stronger solid product, (2) heating at 1200 deg. results in very strong material as high performance concrete, (3) the material strength is uniquely determined by the density of the solid product, (4) a linear relation between the Vickers hardness and the uniaxial strength is obtained, (5) the surface heating causes a layered product whose physical properties differ in different layer, and (6) flow of surface soil due to the partial melting greatly affects the thermal conductivity and the volume of the solid product.
