中文摘要：

在气候变化引起的极端低温条件下,水泥基材料的性能变化直接影响水工混凝土的性能。本文以不同含水条件的水泥基材料为研究对象,在-60℃极端低温条件下,对水泥基材料的质量损失、相对动弹模变化、抗折强度、抗压强度、冻胀变形、孔隙率和平均孔径等参数进行了试验研究。研究结果表明,-60℃极端低温冻融作用使水泥基材料的力学性能下降、轴向冻胀率变大、孔隙率增大、平均孔径变大。并揭示了受冻前后水泥基材料含水条件对其抗冻性、力学性能、冻胀变形和微观孔结构等性能的影响规律。

英文摘要：

The property of cementitious materials in extreme low temperature can directly affect the performance of hydraulic concrete.Cementitious materials with different water conditions were taken as the study object,the mass loss,relative dynamic modulus,flexural strength,compressive strength,frost deformation,and pore parameters properties of cementitious materials were studied under-60 ℃ low temperature condition.The influence rules of water contain condition of cementitious materials before freezing on the frost resistance,mechanical properties,volume deformation,and micro pore structure of cementitious materials were also revealed.