主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (1): 34-37.

• • 上一篇    下一篇

基于隧道防火用的多孔注浆基材料研究

杨念东1 ，刘 胜1 ，徐天勇1 ，陈代果2
  

  1. （1. 咸宁市消防救援支队，湖北 咸宁 437100；2. 中国科学技术大学 中国科学院材料力学行为和设计重点实验室，安徽 合肥 230026）
  • 出版日期:2023-01-15 发布日期:2023-01-15
  • 作者简介:杨念东（1978- ），男，湖北安陆人，湖北省咸宁市消防救援支队防火监督科中级专业技术职务，硕士，主要从事防火监督工作，湖北省咸宁市咸宁大道2号，437100。
  • 基金资助:
    国家自然科学基金项目（12002293）

Preparation and performance research of porous grouting-based materials for tunnel fire protection

Yang Niandong1 , Liu Sheng1 , Xu Tianyong1 , Chen Daiguo2
  

  1. （1. Xianning Fire and Rescue Division, Hubei Xianning 437100, China; 2. CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Anhui Hefei 230026, China）
  • Online:2023-01-15 Published:2023-01-15

摘要：

采用溶液共混法制备了多孔聚氨酯注浆材料，以纳米SiO2为增强相，研究了改性多孔注浆基材料的结构形貌、力学性能、阻燃性能和导热性能，研究结果表明：纳米 SiO2掺杂后与聚氨酯基体发生了键合，增强了多孔注浆材料的孔壁强度，形态结构更加完整，多孔注浆材料的拉伸强度和粘接强度得到了改善，并随纳米 SiO2掺杂量的增大呈现出先增大后降低的趋势，纳米 SiO2掺杂量 0.8%的多孔注浆材料的拉伸强度和粘接强度均达到了最大值。随纳米 SiO2掺杂量的增加，多孔注浆材料的最高蓄热温度先降低后升高，降温速率先增加后降低，导热系数持续增加。阻燃测试表明：0.8%纳米 SiO2掺杂的注浆材料的垂直燃烧时间最短为20.8 s，阻燃性能最优。综合各性能来看，纳米 SiO2最佳掺杂量为0.8%，该掺杂比例下多孔注浆基材料最高蓄热温度为 143 ℃，降温速率为 1.75 ℃/min，导热系数为 0.368 W/（m·K），垂直燃烧时间为 20.8 s，在隧道防火应用方面具有广阔的应用前景。

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Abstract:

In this paper, the porous polyurethane grouting material was prepared by solution blending method. The nano- SiO2 was used as the reinforcing phase to study the structure, morphology, mechanical properties, flame retardancy and thermal conductivity of the modified porous grouting- based material. The results show that: After the nano-SiO2 doping, it is bonded with the polyurethane matrix, which enhances the pore wall strength of the porous grouting material, makes the morphological structure more complete, and improves the tensile strength and viscosity of the porous grouting material. The increase of the amount shows a trend of first increase and then decrease. The tensile strength and viscosity of the porous grouting material with nano-SiO2 doping content of 0.8% both reach the maximum value. With the increase of nano-SiO2 doping content, the maximum heat storage temperature of porous grouting material first decreased and then increased, the cooling rate increased first and then decreased, and the thermal conductivity continued to increase. The flame retardant test shows that the vertical burning time of the 0.8% nano- SiO2 doped grouting material is the shortest 20.8 s, and the flame retardant performance is the best. From the perspective of various properties, the optimal doping
amount of nano-SiO2 is 0.8%. Under this doping ratio, the maximum heat storage temperature of the porous grouting-based material is 143 ℃, the cooling rate is 1.75 ℃/min, and the thermal conductivity is 0.368 W/（m · K）, the vertical burning time is 20.8 s, and it has broad application prospects in tunnel fire protection applications.

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