纳米材料对混凝土抗盐冻性能的影响

The Effect of Nanomaterials on the Freeze-deicing Salt Resistance Performance of Concrete

本文通过在混凝土中添加纳米SiO_2及CaCO_3来研究混凝土抗盐冻性能的影响。结果表明:当纳米SiO_2掺量为1%时,其抗压强度提高,第300次盐冻循环时,其相对动弹性模量是基准混凝土的103.33%,质量损失是基准混凝土的47.03%,抗氯离子渗透深度是基准混凝土的71.43%。总体来看,掺入纳米SiO_2对混凝土抗盐冻性能的提高优于掺入纳米CaCO_3。

The freeze-deicing salt resistance effects of adding nano-sio2 and CaCO3 in concrete are studied in the article.Results show that the compressive strength increases when the nanometer SiO2 content of 1%,the 300th salt frozen loop,the relative dynamic elastic modulus is 103.33%of the reference concrete,mass loss is 47.03%of the reference concrete,resistance to chloride ion penetration depth is 71.43%of the reference concrete.In general,nano-sio2 has a better performance than nanomaterials CaCO3 on concrete freeze-deicing salt resistance.