针对寒区机场对填缝料耐低温性能的要求，对不同负温作用时间（0、1、7、15、30 d）后的聚合物水泥基复合填缝料（Polymer-Cement Based Composed Joint Sealant，PCJS）的性能进行了测试，通过测试-20℃条件下PCJS的粘结性能（定伸形态、弹性恢复率）、力学性能（剪切强度、剪切应变、剪切韧度）和变形性能（断裂伸长率），研究了负温环境对PCJS性能的影响规律。结果表明，PCJS具有良好的耐低温性能；负温作用后PCJS定伸形态良好，弹性恢复率、剪切韧度和断裂伸长率随负温作用时间的延长先增大后减小，剪切强度不断增大，剪切应变逐渐减小。同时结合PCJS的微观形貌，提出了其微结构生成模型。

In accordance with the requirements of the airport in cold areas for the low temperature resistance of joint sealant, the properties of polymer cement-based composite joint sealant (PCJS) after different negative temperature action time (0 d, 1 d, 7 d, 15 d and 30 d) are tested.By testing the bonding properties (fixed elongation morphology and elastic recovery rate), mechanical properties (shear strength, shear strain and shear toughness) and deformation properties (elongation at break) of PCJS under the condition of -20℃, the influence of negative temperature environment on PCJS performance is studied.It is shown that PCJS has good low temperature resistance.PCJS has a good fixed elongation form after negative temperature, and its elastic recovery, shear toughness and elongation at break first increase and then decrease with the extension of negative temperature while the shear strength continues to increase, and the shear strain decreases gradually.Combined with the microscopic appearance of PCJS, a microstructure generation model is proposed.

王志航(1996-),男,硕士生,研究方向为机场道面新型填缝料,1833525542@qq.com