The Coupled Effect of Loading Rate and Grain Size on Tensile Strength of Sandstones under Dynamic Disturbance

Table 2

Mineral compositions of the three types of sandstone.

Mineral	Mass percentage
	CG	MG	FG
kaolinite	12	10	8
Quartz	50	40	55
Plagioclase	20	25	22
K-feldspar	18	25	15