Fig. 2. Diagram of the rotational clockwise motion of a soil aggregate as the surface is randomly abraded along the wall of the SAE chamber. The SAE chamber is stationary and moving along a rotary pattern on the platform of the orbital shaker. Positions p₁, p₂, p₃, ... p_n represent the rotational clockwise pattern of the aggregate at times t₁, t₂, t₃, ... t_n.