改性钢渣基相变微粉的制备与性能

发布时间：2018-04-13 06:44

  本文选题：改性钢渣微粉 + 相变储能　； 参考：《过程工程学报》2017年06期

【摘要】：通过真空吸附法制备以改性钢渣微粉为壁材、石蜡为芯材的改性钢渣基相变微粉,表征了其孔结构、物质组成、相变温度与相变焓、粒度分布、表面形貌;以改性钢渣基相变微粉制备混凝土,分析了其流动性、粘聚性和保水性、力学性能和水化热性能.结果表明,磷酸用量、石蜡用量和干燥箱内压强对相变微粉的石蜡吸入量有重要影响,当磷酸用量为6%(?)、石蜡用量为30%(?)、干燥箱内压强为0.04 MPa时,相变微粉具有良好的相变储能性能,相变温度为53.7℃,相变焓为12.20 J/g.相变微粉混凝土不仅具有良好的流动性、粘聚性和保水性及早期强度高、后期强度稳定的力学性能,且可降低混凝土温度峰值、迟滞达到温峰的时间.
[Abstract]:The modified steel slag based phase change powder with modified steel slag powder as wall material and paraffin as core material was prepared by vacuum adsorption method. The pore structure, material composition, phase transition temperature and enthalpy of phase transformation, particle size distribution and surface morphology were characterized.The fluidity, agglomeration, water retention, mechanical properties and hydration heat properties of modified steel slag based phase change micropowder were analyzed.The results showed that the amount of phosphoric acid, the amount of paraffin wax and the pressure in the drying box had important effects on the amount of paraffin absorbed into the powder. When the amount of phosphoric acid was 6%, the amount of paraffin wax was 30%, the pressure in the dryer was 0.04 MPa.The phase change micropowder has good phase change energy storage performance. The phase transition temperature is 53.7 鈩，

本文编号：1743363