纳米材料对再生混凝土抗冻性能的影响

The Effect of Nanomaterials on Anti-frost Performance of Recycled Concrete

本文制备了纳米再生混凝土样品并分析了冻融循环作用下样品的抗压强度、质量损失率和相对弹性模量等基本抗冻性能。结果表明:随着冻融循环次数的增大,再生混凝土的抗压强度和相对弹性模量逐渐降低,质量损失率先减小后增大;纳米材料可以有效提高再生混凝土的抗压强度和相对弹性模量、降低质量损失率,最佳纳米二氧化硅掺量为4%。

The samples of the nanometer recycled concrete were prepared and analyzed the compressive strength, mass loss rate and relative elasticity modulus etc under the action of freeze-thaw cycle.The results showed that with the increase of freeze-thaw cycles, the compressive strength and relative elastic modulus of recycled concrete decreased gradually, the mass loss rate decreased and then increased.Nanomaterials could effectively improve the compressive strength and relative elastic modulus of recycled concrete, and reduced the mass loss rate.The optimum content of nano silica was 4%.