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新型墙体材料与施工
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高性能纤维增强水泥基复合墙板热力学和耐火性能研究

作者:程宝军,康升荣,麻鹏飞,杨文,史博元

关键字:高性能,纤维,增强,水泥,基,复合,墙板,热力学,

 
(中建西部建设建材科学研究院有限公司,四川 成都  610064)
    摘要:基于高性能纤维增强水泥基复合材料和泡沫混凝土设计了一种新型复合墙板,并研究其热力学和耐火性能。结果表明,复合墙板的传热阻随着填充的泡沫混凝土密度等级的降低而增大,传热系数最低为0.77 W/(m2·K);复合墙板燃烧性能为A1级,耐火极限达到3 h。高性能纤维增强水泥基复合材料在高温环境下水化产物之间发生物理化学反应,由碳酸钙、水化硅酸钙、钙矾石、铝酸三钙生成氧化钙和钙铝黄长石;泡沫混凝土在高温环境作用下出现明显的收缩现象,水化产物结晶程度增加。
    关键词:纤维增强水泥基复合墙板;泡沫混凝土;热力学性能;耐火性能
    中图分类号:TU352.5         文献标识码:A        文章编号:1001-702X(2021)01-0116-05
 
Research on thermodynamic properties and fire resistance of high performance fiber-reinforced cement-based composite wallboard 
CHENG Baojun,KANG Shengrong,MA Pengfei,YANG Wen,SHI Boyuan
(China West Construction Group Building Materials Science Research Institute Co. Ltd.,Chengdu 610064,China)
    Abstract:In this paper,a new type of composite wallboard was designed based on high performance fiber-reinforced cement composites and foamed concrete,and its thermodynamics and fire resistance were studied. The results show that the heat transfer resistance of composite wallboard increases with the decrease of the density grade of the filled foamed concrete,and the lowest heat transfer coefficient is 0.77 W/(m2·K). The combustion performance of composite wallboard is A1,which belongs to non-combustible level,and the fire resistance is 3 h. Under the high temperature environment,the hydration products of high performance fiber-reinforced cement composites have physical and chemical reactions. From calcium carbonate,calcium silicate hydrate,ettringite,tricalcium aluminate,calcium oxide and calc-aluminosite are generated. Under the action of high temperature,the foamed concrete shrinks obviously and the degree of crystallization of hydration products increases.  
    Key words:fiber-reinforced cement composites wallboerd,foamed concrete,thermodynamic properties,fire resistance