高温对气凝胶-水泥基复合材料的性能影响研究  

Effect of High Temperature on the Performance of Aerogel-cement Composite Materials

作　　者：杨玺 黄冬梅[1] YANG Xi;HUANG Dong-mei(College of Energy,Environment and Safety Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学能源环境与安全工程学院,杭州310018

出　　处：《武汉理工大学学报》2024年第10期25-32,共8页Journal of Wuhan University of Technology

基　　金：国家自然科学基金面上资助项目(51976205)。

摘　　要：研究了高温对气凝胶-水泥基复合材料(ACMs)隔热性能与热稳定性的影响。制备了SiO_(2)气凝胶质量含量为0%、5%、7%、10%的ACMs样品,并将样品在400℃、600℃、800℃、1000℃的高温下进行热处理。分析了ACMs的质量损失、密度、抗压强度、孔结构、导热系数与微观形貌。结果表明,气凝胶的添加提高了ACMs在高温下的隔热性能。常温下,掺入量为10%的ACMs热导率降低了48.04%,密度减少了30.5%。600℃下,不同气凝胶添加量的ACMs热导率均达到最低值,热处理超过600℃时,气凝胶隔热性能逐渐失效。气凝胶的添加有效地降低了高温对ACMs质量损失、密度、抗压强度和孔结构的影响,有效改善了ACMs在高温下的热稳定性。The present study aims to evaluate the influence of high temperature on the thermal insulation performance and thermal stability of aerogel-cement composite materials(ACMs).ACMs samples with SiO_(2) aerogel content of 0%,5%,7%,and 10%were prepared,and the samples were subjected to heat treatment at high temperatures of 400℃,600℃,800℃,and 1000℃.The analysis included the assessment of ACMs mass loss,density,compressive strength,pore structure,thermal conductivity,and microscopic morphology.The results indicate that the addition of aerogel enhances the thermal insulation performance of ACMs at high temperatures.At room temperature,the thermal conductivity of ACMs with 10% aerogel decreased by 48.04%,and the density decreased by 30.5%.At 600℃,the thermal conductivity of ACMs with different aerogel addition amounts reached its minimum value.However,beyond 600℃,the thermal insulation performance of aerogel gradually deteriorated.The addition of aerogel effectively reduced the influence of high temperature on the mass loss,density,compressive strength,and pore structure of ACMs,thereby enhancing the thermal stability of ACMs at high temperatures.

关 键 词：SiO_(2)气凝胶 高温 孔结构 隔热性能 热稳定性 

分 类 号：TU55[建筑科学—建筑技术科学]