Laboratory Investigation on the Disintegration Characteristics of Purple Parent Rocks

The paper focused on the disintegration characteristics of purple parent rocks from the K
2
m, J
3
t and J1l, Yunnan Province of Southern China under laboratory conditions. The experiment was designed according to applications of water, heat and hydrothermal interaction during five treatments: wetting-drying (WD), saturation (ST), refrigeration-heating (RH), a combination of wet-dry and refrigeration-heating (WDRH), and a combination of saturation and refrigeration-heating (STRH). The results showed that the rank order of the disintegration rates was the following: WDRH > STRH > ST > WD > RH. The disintegration rate was a positively with cycle number of the treatment for J
1
l and K
2
m, but a negatively correlation for J
3
t. And the disintegration rate was positively correlation with temperature fluctuations and moisture content. The rank order of contribution of the impact factors to rock's disintegration is following: cycle number > temperature change > moisture content.