Determination of hand soil loading, soil transfer, and particle size variations after hand-pressing and hand-mouthing activities.

ABSTRACT: Hand-pressing trials and hand-to-mouth soil transfer experiments were conducted to better understand soil loadings, soil transfer ratios for three mouthing activities, and variations in particle size distributions under various conditions. Results indicated that sand caused higher soil loadings on the hand than clay. When the moisture level of clay soil exceeded its liquid limit, soil loadings also increased. Greater pressing pressures also led to larger clay loadings. Clay with a moisture content close to its plastic limit caused the smallest soil loadings due to strong soil cohesion. Particle sizes of the transferred clay were larger than that of the original clay, indicating that hand-pressing and the pressure exerted may have enhanced clay particles of larger sizes adhering onto the ha

SUBMITTER: Hsi HC 

PROVIDER: S-EPMC6147011 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature