建筑能耗的不断增加,固体废物种类和数量的增加严重阻碍了社会经济的快速发展。因此,降低建筑能耗,同时实现废弃物的资源化,已成为新时期环保建设的主流话题。以EPS颗粒为轻质骨料,制备了用于建筑墙体的碱活化超轻泡沫保温材料(AFIM)。EPS用量的影响,颗粒大小,和抗压强度的级配,干密度,热导率,研究了AFIM的体积吸水率。结果表明,在保证AFIM良好力学性能的同时,EPS颗粒可以显著降低干密度,热导率,和AFIM的体积吸水率。令人兴奋的是,AFIM的最佳热导率和干密度分别为0.0408W/(m·K)和127.03kg/m3。微观形貌结果表明,EPS颗粒与AFIM浆料具有良好的相容性,它们之间的界面过渡区(ITZ)致密,没有明显的裂缝。此外,从四个方面对AFIM的可行性进行了评估:性能,能源消耗,碳排放,和生命周期成本(LCC)。令人欣慰的是,AFIM的性能与传统隔热材料的性能相当,在节能方面表现出显著优势,与传统胰岛素材料相比,减排量和经济效益。
The continuous increase in building energy consumption, and the increasing types and quantities of solid waste have seriously hindered the rapid development of social economy. Therefore, reducing building energy consumption while realizing the recycling of waste has become the mainstream topic of environmental protection construction in the new era. An alkali-activated ultra-light foamed insulation material (AFIM) for building walls was prepared using EPS particles as lightweight aggregates. The effects of EPS dosage, particle size, and gradation on the compressive strength, dry density, thermal conductivity, and volumetric water absorption of AFIM were studied. The results showed that while ensuring good mechanical properties of AFIM, EPS particles can significantly reduce the dry density, thermal conductivity, and volumetric water absorption of AFIM. Excitingly, the optimal thermal conductivity and dry density of AFIM were 0.0408 W/(m·K) and 127.03 kg/m3, respectively. The microscopic morphology results showed that there was good compatibility between EPS particles and AFIM slurry, and the interface transition zone (ITZ) between them was dense and without obvious cracks. In addition, the feasibility of AFIM was evaluated from four aspects: performance, energy consumption, carbon emissions, and life cycle cost (LCC). It was encouraged that the performance of AFIM was comparable to that of traditional insulation materials, and showed significant advantages in energy conservation, emission reduction and economic benefits compared to traditional insulatin materials.