Effect of Surrogate Aggregates on the Thermal Conductivity of Concrete at Ambient and Elevated Temperatures

Table 1

Physical properties of glass bead, fine, normal, and lightweight aggregates.

Properties	Fine; aggregate	Coarse aggregate			Glass bubbles
		Normal	Argex	Asanolite
Raw material	Granite	Granite	Clay	Shale	Soda-lime borosilicate
Maximum size (mm)	1.2	25	8	19	0.065
Dry loose bulk density (kg m^−3)	1480	1680	650	800	125
Water adsorption (%)	1.0	—	19.0	12.0	—