冻融循环对非水反应高聚物材料抗剪特性的影响研究

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中图分类号：TQ323.8；U414

文献标志码：A 文章编号：1001-5922（2025）06-0097-04

Research on the influence of freeze-thaw cycles on the shear properties of non-aqueous reactive polymer materials

LIU Chunmei1，LIU Na2，3，ZHONG Yong1，HE Jiannan3

（1. Xinjiang Transpaortation Investment（Group）Co.，Ltd.，Operation Branch，Urumqi 830091，China；

2. Research and Development Center of Transport Industry of Technologies，Materials and Equipments of Highway Construction and Maintenance，Zhengzhou ，China；

3. Henan Zhonggong Design & Research Group Co.，Ltd.，Zhengzhou ，China）

Abstract：In this paper，the shear strength of polymer materials with different densities under different freeze-thaw cycles was tested by cylinder torsion test. The nonlinear surface fitting of shear strength，density and freeze-thaw cy⁃ cles was carried out，and the damage mechanism of freeze-thaw cycles on polymer materials was revealed by scan⁃ ning electron microscope. The results show that the shear strength of polymer materials with the same density de⁃ creases with the increase of freeze-thaw cycles. The shear freeze-thaw damage degree of polymer materials increases with the increase of freeze-thaw cycles. The decrease of the shear strength of the polymer materials after the freeze-thaw cycle is essentially due to the damage of the bubble holes of the polymer material under the action of the reeze-thaw cycle，which leads to the decrease of the shear strength

Key words：non-aqueous reactive polymers；freeze-thaw cycle；shear strength；shear freeze-thaw damage degree； electron microscope scanning anchor

非水反应聚氨酯高聚物注浆材料是一种早期强度高、抗渗性能好、高膨胀性和耐久性优良的新型基础设施修复材料[1]，高聚物注浆修复技术也具有非开挖、施工速度快、环保等优良的工程特性[2-3]。（剩余5332字）