What is granular disintegration

In dry climates a yet another  mechanism operates much like frost action, in this process the ground water is drawn to the surface, which on evaporation leaves behind salts such as halite, calcite, and gypsum. This  salt-crystal growth in pore spaces cracks the mineral particles apart.  In igneous rocks, such as granite, water can enter into in the fractures between the grains and break up the igneous rock into its separate grains. This is called  granular disintegration