秸秆板吸湿特性及其对导热系数的影响  

HYGROSCOPICITY OF STRAW BOARD AND ITS INFLUENCE ON THERMAL CONDUCTIVITY

作　　者：孙世钧[1] 展长虹[1] 韩雪莹 文哲琳 SUN Shijun;ZHAN Changhong;HAN Xueying;WEN Zhelin(School of Architecture,Harbin Institute of Technology,Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology,Ministry of Industry and Information Technology,Harbin 150006,China;Harbin China Overseas Land&Investment Co.,Ltd.,Harbin 150086,China)

机构地区：[1]哈尔滨工业大学建筑学院,寒地城乡人居环境科学与技术工业和信息化部重点实验室,哈尔滨150006 [2]哈尔滨中海地产有限公司,哈尔滨150086

出　　处：《低温建筑技术》2021年第11期50-53,共4页Low Temperature Architecture Technology

基　　金：国家自然科学基金(51778168)。

摘　　要：建筑室内外环境湿度对秸秆板的含湿量影响较大,进而影响其导热性能,因此研究其吸湿特性及含湿量对其导热系数影响规律,有利于促进这种绿色建材推广应用。文中采用恒温恒湿箱法研究了相对湿度与秸秆板吸湿速率及导热系数变化规律。研究结果表明秸秆板的吸湿速率和导热系数随相对湿度的增大而增大,秸秆板的热工性能受其本身骨架密度及内部空气对其影响不大。质量含湿量每增加1%,其导热系数平均增加7.7%。Environmental humidity significantly influences the thermal conductance of the organic straw board.The constant temperature and humidity box method were devised to study the influence of air relative humidity on the moisture absorption rate and thermal conductivity.The results indicated that the change rate of the organic straw board’s moisture absorption rate and thermal conductivity increased with the increasing air relative humidity,moreover,the thermal performance of straw board is not affected by its skeleton density and internal air.When the mass moisture content increases by 1%,the average thermal conductivity increases by 7.7%.

关 键 词：秸秆板 等温吸湿曲线 平衡含湿量 导热系数 

分 类 号：TU502[建筑科学—建筑技术科学]