环境温度对硅酸盐改性聚氨酯注浆材料力学性能的影响  

Effect of Environmental Temperature on Mechanical Properties of Silicate Modified Polyurethane Grouting Materials

作　　者：郭小雄 黄钦颢 彭旸 袁超[3,4] 李树忱[4] GUO Xiaoxiong;HUANG Qinhao;PENG Yang;YUAN Chao;LI Shuchen(Railway Construction Research Institute of China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China;State Key Laboratory of High-Speed Railway Track System,Beijing 100081,China;School of Future Technology,Shandong University,Jinan 250062,China;Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250062,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]高速铁路轨道系统全国重点实验室,北京100081 [3]山东大学未来技术学院,济南250062 [4]山东大学岩土与结构工程研究中心,济南250062

出　　处：《硅酸盐通报》2025年第2期774-784,共11页Bulletin of the Chinese Ceramic Society

基　　金：国家创新平台开放基金(2022YJ124)。

摘　　要：为分析有机-无机复合注浆材料在高温环境中的适用性,本文以水玻璃、甘油和催化剂为A组分,以异氰酸酯、塑化剂、阻燃剂为B组分,制备了双组分硅酸盐改性聚氨酯注浆材料,讨论了环境温度对新型注浆材料力学性能的影响,研究了硅酸盐改性聚氨酯浆液强度的环境温度响应规律;以石英砂岩为注浆基体材料预制裂隙,采用新材料进行注浆加固,结合微观表征分析了浆-岩界面胶结特征。结果表明,受高温环境的影响,硅酸盐改性聚氨酯浆液固结体的强度与弹性模量出现下降趋势,25℃下浆液固结体抗压强度、抗拉强度、抗压弹性模量与抗拉弹性模量分别达到48.16、15.47、507.47和520.10 MPa,当环境温度升高至90℃时分别降至38.13、9.63、387.57和410.84 MPa,材料对环境温度敏感性较低。环境温度升高打破了双组分之间化学反应的平衡,降低了有机相交联固化程度与固结体密实度,材料强度下降。To analyze the applicability of organic-inorganic composite grouting materials in high temperature environments,this paper prepared a two-component silicate modified polyurethane grouting material with water glass,glycerol,and catalyst as component A,and isocyanate,plasticizer,and flame retardant as component B.The effect of environmental temperature on the mechanical properties of the new grouting material was discussed,and the environmental temperature response law of the strength of silicate modified polyurethane slurry was studied.The quartz-sandstone was used as the grouting matrix material to perform cracks,new materials were reinforced by grouting,and the bonding characteristics of the slurry rock interface were analyzed through microscopic experiments.The results show that under the effect of high temperature environment,the strength and elastic modulus of silicate modified polyurethane slurry consolidated body show a decreasing trend.At 25℃,the compressive strength,tensile strength,compressive elastic modulus,and tensile elastic modulus of the slurry consolidated body reach 48.16,15.47,507.47,and 520.10 MPa,respectively.When the environmental temperature increases to 90℃,they decrease to 38.13,9.63,387.57,and 410.84 MPa,respectively.The material has low sensitivity to environmental temperature.The increase in environmental temperature disrupts the equilibrium of chemical reactions between the two components,reduces the degree of organic crosslinking solidification and the compactness of the consolidated body,resulting in a decrease in strength of the materials.

关 键 词：改性聚氨酯 注浆加固 高温环境 力学性能 胶结特征 微观形貌 

分 类 号：TQ317[化学工程—高聚物工业]