Study on the Mechanical Properties and Thermal Conductivity of Cotton Stalk Fiber Heat-Insulating Shotcrete

Table 3

Quality index of sand and stone.

Project	Sediment percentage (%)	Stacking density (kg/m^3)	Particle size range (mm)	Apparent density (g/cm^3)
Sand	≤2	1470	0.16–1.0	2690
Cobblestone	≤0.2	1580	5–10	2700