The Effect of Graphite on the Physical and Mechanical Performance of Foam Concrete

Abstract

High-strength lightweight foam concrete was prepared by taking cement and fly ash as raw materials. The effect of graphite on the physical and mechanical performance of graphite foam concrete has been studied, Scanning Electron Microscope and X-Ray Powder Diffraction to analyze the microscopic morphology and phase of the material. Results show that: The dry density and compressive strength of graphite foam concrete increase with the increase of graphite, while the porosity decrease; when the graphite is 5%, the dry density is the minimum about 581kg/m3, when the graphite is 10%, the compressive strength is the minimum about 1.8MPa. In alkaline conditions, the activity of the fly ash is excited, C-S-H gel was formed; Graphite has no effect on the composition of graphite foam concrete.