Study on the Properties of Graphene Fiber Concrete Materials for Energy Piles

Abstract

Energy piles are employed as innovative buried pipe structures within ground source heat pump systems, leveraging the superior specific heat capacity and heat transfer characteristics of concrete materials. Research was conducted on graphene concrete energy piles, wherein graphene fiber concrete was formulated by incorporating various quantities of graphene into steel fiber concrete. The findings indicate that, in comparison to conventional fiber concrete, graphene fiber concrete exhibits minimal alterations in flexural and split tensile strengths, a notable enhancement in compressive strength, and a considerable boost in thermal conductivity. These advancements demonstrate that the enhanced graphene concrete positively impacts the lifespan extension and long-term stable functionality of energy piles in challenging environmental conditions.