Changes in microstructure and physical properties of rocks caused byn artificial freeze-thaw action

摘要

The freeze-thaw action of water inside rocks' pores, cracks, and joints plays a dominant role in physical rock weathering where the temperature fluctuates across 0 degrees C. To understand this process in cold regions, artificial weathering was simulated in the laboratory. Diorite, basalt, and tuff were used as specimen, and were maintained in saturated conditions to accelerate the effect of freeze-thaw weathering. X-ray computed tomography (CT) images and scanning electron microscope (SEM) phot