The Preparation of Phase Change Energy Storage Ceramsite from Waste Autoclaved Aerated Concrete
Procedia Environmental Sciences(2016)
Abstract
During phase transition process, phase change materials (PCMs) can absorb or release a large amount of heat from the environment while maintaining its own temperature basically unchanged. The phase change energy storage material suitable for buildings was obtained from paraffin liquid and stearic acid with mass ration of 78:22, and the melting temperature can be regulated from 25°C to 35°C. Two step encapsulation was used to prepare phase change energy storage ceramsite: Waste aerated concrete was soaked in a mixed slurry composed of cement, white latex, steel slag powder and water; mixed powder of building gypsum and manganese slag was coated on the particles prepared in step . It solves the problem of easy leakage of phase change materials and compatibility with aggregate and cement, which provides a cost-effective approach for the utilization of waste autoclaved aerated concrete.
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Key words
Phase change energy storage material,Energy conservation,Building material,Ceramsite
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