this thread is packed with good info. i seen some fellows putting lifts on a slope and rolling them in with a smooth drum the other day. unless they were roughing the surface of the dirt up between lifts they were making a crucial mistake due to the ability of bonding discussed above. ever see them mudslides on highway cutouts where they sloped to the top of hill after cutting it down for the highway? either the dirt didnt bond or they used to low pi material in their fill that absorbed to much water weight. anyway this thread is very informing at least i think so
