硅酸盐通报2025，Vol.44Issue(2)：774-784,11.DOI:10.16552/j.cnki.issn1001-1625.2024.0936
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
摘要
Abstract
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Key words
modified polyurethane/grouting reinforcement/high temperature environment/mechanical property/adhesive characteristic/microstructure分类
化学化工引用本文复制引用
郭小雄,黄钦颢,彭旸,袁超,李树忱..环境温度对硅酸盐改性聚氨酯注浆材料力学性能的影响[J].硅酸盐通报,2025,44(2):774-784,11.基金项目
国家创新平台开放基金(2022YJ124) （2022YJ124）
