冻融环境下的混凝土抗冻抗裂性能研究

Experimental Study on the Mechanical Properties of Concrete under Freeze-thawing Environment and Anti-freeze Cracking Performance

为了获得冻融环境下混凝土的力学特性和抗冻性能,分别对普通混凝土和聚丙烯纤维混凝土进行多次快速冻融循环,通过室内试验分别测量不同冻融循环次数后普通混凝土和聚丙烯纤维混凝土质量损失、动弹模损失和抗压强度、抗折强度等力学参数的变化规律。通过试验结果分析发现,随着冻融循环次数的增加进行,混凝土的力学特性明显降低,其中聚丙烯纤维混凝土在冻融环境下的力学特性和抗冻裂性能明显优于普通混凝土。

To obtain the mechanical properties of concrete under freeze-thaw environment and antifreeze performance, ordinary concrete and polypropylene fiber concrete is teseted respectively with rapid freezing and thawing cycles, which were measured by indoor experiment of ordinary concrete and polypropylene fiber concrete quality loss, loss of move mode and parameters such as compressive strength, flexural strength after different freeze-thaw cycles. It was found that with the increase of freeze-thaw cycles, the mechanical properties of concrete obviously decreases, including the mechanical properties of polypropylene fiber concrete in the freeze-thaw environment and frost crack resistance significantly better than that of ordinary concrete.