Development of a novel bio-inspired cement-based composite material to improve the fire resistance of engineering structures
Development of a novel bio-inspired cement-based composite material to improve the fire resistance of engineering structures
复制标题
开发新型仿生水泥基复合材料以提高工程结构的耐火性能
DOI：
10.1016/j.conbuildmat.2019.07.121
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发表时间：
2019-11
影响因子：
7.4
通讯作者：
Zhiguo Yan
中科院分区：
文献类型：
--
作者：
Tong Zhang;Yao Zhang;Ziqi Xiao;Zhenglong Yang;Hehua Zhu;J Woody Ju;Zhiguo Yan
混凝土在高温下的力学性能会显著下降，对结构的安全构成威胁。本文提出了一种能够提高工程结构耐火性能的新型仿生水泥基复合材料。这种受生物启发的胶凝系统的功能类似于人体的汗腺和皮肤，由APP-Per-en复合材料、合成增强纤维和混凝土粘结剂组成。APP-Per-EN复合材料主要由聚磷酸铵、季戊四醇和三聚氰胺组成，以低密度聚乙烯为基料，在双螺杆挤出机中熔融共混，然后采用切粒成型技术制备。在微观层面上，采用X射线衍射仪、傅立叶变换红外光谱、热重分析、差示扫描量热仪和扫描电子显微镜等多种分析手段对该新型复合材料的热性能和阻燃性能进行了表征。在宏观层面上，单侧加热试验表明，热触发防火系统通过熔融、接通、发泡、溢流等方式具有显著的隔热效果。因此，这种新型复合体系在工程结构抗火方面具有广阔的应用前景。
The mechanical properties of concrete can degrade significantly under high temperature, posing a threat to the safety of structures. In this work, a novel bio-inspired cement-based composite material that can improve the fire resistance of engineering structures is put forward. This bio-inspired cementitious system, which functions in a manner similar to that of sweat glands and skin in the human body, consists of APP-PER-EN composite, synthetic reinforcing fibers, and concrete binder. The APP-PER-EN composite is mainly composed of ammonium polyphosphate, pentaerythritol, and melamine, with low-density polyethylene as the base material, which is prepared by melt compounding in a twin-screw extruder followed by grain cutting molding technique. At the micro level, multiple analysis methods are used, including X-ray diffraction, Fourier transform infrared ray, thermo-gravimetric analysis, differential scanning calorimeter, and scanning electron microscopy, to characterize the thermal and flame retardant behavior of this novel composite. At the macro level, the one-side heating tests indicate that the thermally triggered fire-resistant system can exhibit significant thermal insulation effect through melting, connecting, foaming, and overflowing. Therefore, the novel composite system is expected to exhibit a promising prospect in the fire resistance of engineering structures.
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