基于冻融温度的水工混凝土抗冻性研究

Study on Frost Resistance of Hydraulic Concrete at Freeze-thaw Temperature

文章利用气候模拟系统试验研究了F300、F50两种水工混凝土,在-40℃、-30℃、-25℃、-18℃、-10℃、-5℃冻融最低中心温度下的抗冻性。结果表明:在不同冻融中心低温条件下高与低抗冻设计水工混凝土所能经受最大冻融循环次数、力学性能、动弹性模量、质量损失等变化规律存在差异,水工混凝土的微观特性在冻融作用后发生明显的改变。

The freezing resistance of two kinds of hydraulic concrete,F300 and F50,the minimum freeze-thaw central temperature at-40℃,-30℃,-25℃,-18℃,-10℃and-5℃is studied by using climate simulation system.The results show that the maximum number of freeze-thaw cycles can be withstood by high and low freeze-thaw design hydraulic concrete,and the dynamic elastic modulus of the mechanical properties and mass loss are different at different low temperatures.The microscopic properties of hydraulic concrete change obviously after freeze-thaw action.