Adhesi tanah-metal pada berbagai tingkat perubahan kepadatan dan kadar air tanah

Abstract

Soil, as the nature body, is very important in supporting the live perpetuity of the living creatures. In farm machinery and equipment application for soil tilling, soil also affects the goal of the soil tillage activities. When the soil tillage equipment and machinery are to be applied in the field. there will Qe interaction among the traction device, the blade, and the soil. The soil, which is used as a machine supporter, must have a certain consistency. Consistency is the degree of cohesion and adhesion among soil partides and soil mass resistance to the variation of shape by pressure and sfrengU, that affected the soil deformation. The objective of the research was to study the soil - metal adhesion due to the variation of soil compactness and the soil moisture content. Resutts of the research showed that soil - metal adhesion increased by the increasing of soil moisture content from 39.3% to 82.2 %, but it decnraS8d by the increasing of soil compactness from 0.47 g/cc to 0.05 g/cc. THe soil-metal adhesion decreased and deceased again by the increasing of the soil moisture content until it reached a very wet or saturated conditions of the soil. Soil strength was much more affected by the soil - metal adhesion than by the soil-metal friction. Friction phase, adhesion phase, and lubrication phase occurred when the soil moisture content reached r 40.8 %, 40.8 - 82.2 %, and 2 82.2 % respectively. The adhesion showed a high value when the soil moisture content reached the adhesion phase.