Preparation and Properties of Lauric Acid Phase Change Energy Storage Concrete

Hao Chen

Chongqing Jiaotong University, Chongqing, 400000, China

Abstract: This paper, lauric acid was chosen as the phase change material, diatomite as the matrix material to prepare phase change energy storage concrete to control the temperature rise inside the concrete and to suppress the temperature cracks in the concrete. Through the proportioning test, the phase change aggregate was prepared with the mixing ratio of 10: 9. Phase change aggregate was used to prepare phase change energy storage concrete with phase change aggregate content of 0%, 5%, 7.5% and 10% respectively. Then, we test and analyze the mechanical properties and thermal properties of phase-change energy storage concrete. The experimental results show that the mechanical properties of phase-change energy storage concrete have no obvious changes when the phase change aggregate content is below 7.5. The results of thermal performance tests of phase change energy storage concrete show that the heat transfer property of concrete is lower than that of ordinary concrete, which is beneficial to the control of cement hydration heat. The specific heat of phase change energy storage concrete Ordinary concrete has been more obvious improvement, that phase change energy storage concrete has better thermal properties than ordinary concrete.

Keywords: Lauric acid; Diatomite; Phase change energy storage concrete; Mechanical property; Thermal property