相变储能混凝土的动态冲击压缩试验与分析

摘要

The varying section and large size Hopkinson pressure bar test apparatus was adopt for the dynamic compressive test of phase-changing energy-storing concrete.Phase-changing energy-storing aggregate is used by ex-pansion perlite as matrix material adsorption of butyl stearate.The dynamic compressive tests were performed on the concrete with different contents of phase-changing energy-storing aggregates and silica fume.Experimental results showed that phase-changing energy-storing aggregate had the adverse effect on the dynamic compressive strength of concrete.With the increase of the mixing ratio,the dynamic compressive of phase-changing energy-storing concrete will decreases gradually.Mixing the silica fume in concrete can enhance its dynamic compressive strength and the optimum content was 10%~15%.%采用变截面霍普金森压杆试验装置,对相变储能混凝土进行动态冲击压缩试验.相变储能骨料以膨胀珍珠岩为基体材料吸附硬脂酸丁酯制备而成的.对不同掺量的相变储能骨料与硅粉的混凝土进行动态冲击压缩试验.试验结果表明,相变储能骨料的掺加对混凝土的动态抗压强度会产生不利影响,随着掺量的增大相变储能混凝土的动态抗压强度逐渐降低;而硅粉能够提高混凝土的动态抗压强度,掺量在10%~15%之间效果最佳.