Preparation and analysis of lauric acid-palmitic acid-tetradecyl alcohol composite phase change concrete
Ternary composite phase change material(LA-PA-TD/EP)was prepared using lauric acid-palmitic acid-tetradecyl and expanded perlite.Encapsulating it using the wet-wrapped cement method,and its mechanical and thermal properties were in-vestigated.The results show that the encapsulation method of wet-wrapped cement can reduce the leakage rate of the ternary composite phase change material to 1.94％,and with the increase of the volume content of phase change aggregate,the mechanical properties of LA-PA-TD/EP composite phase change concrete show a decreasing tendency,but its storage and exothermic properties are enhanced.When the volume content of phase change aggregate is 20％,the compressive strength of phase change concrete specimen is 22.8 MPa,which is 42.7％lower than that of ordinary concrete.The splitting tensile strength was 2.53 MPa,which was 47.0％lower than that of ordinary concrete.The storage and exothermic properties of LA-PA-TD/EP composite phase change con-crete are good,and it meets the basic requirements of concrete.
万方数据
维普
