Enhanced Heat Transfer Characteristics of Graphite Concrete and Its Application in Energy Piles

Table 1

Composition of graphite concretes.

Volumetric content	Cement (g)	Sand (g)	Water (g)	Water-reducing agent (g)	Powdered graphite (g)
Normal concrete	197	799	171	8.56	0
CG5%	197	799	185	8.56	30
CG10%	197	799	199	8.56	60
CG15%	197	799	212	8.56	90
CG25%	197	799	240	8.56	150