Zeng Lunwu, Song Runxia
Jiangsu Key Laboratory for Intelligent Agricultural Equipment, College of Engineering, Nanjing Agricultural University, Nanjing 210031, China.
Sci Rep. 2013 Nov 28;3:3359. doi: 10.1038/srep03359.
The corrosion of steel in concrete is mainly due to the chemical reaction between the chloride ions and iron ions. Indeed, this is a serious threaten for reinforced concrete structure, especially for the reinforced concrete structure in the sea. So it is urgent and important to protect concrete against chloride ions corrosion. In this work, we report multilayer concrete can cloak chloride ions. We formulated five kinds of concrete A, B, C, D and E, which are made of different proportion of cement, sand and glue, and fabricated six-layer (ABACAD) cylinder diffusion cloak and background media E. The simulation results show that the six-layer mass diffusion cloak can protect concrete against chloride ions penetration, while the experiment results show that the concentration gradients are parallel and equal outside the outer circle in the diffusion flux lines, the iso-concentration lines are parallel outside the outer circle, and the concentration gradients in the inner circle are smaller than those outside the outer circle.
混凝土中钢筋的腐蚀主要是由于氯离子与铁离子之间的化学反应。事实上，这对钢筋混凝土结构构成了严重威胁，尤其是对于海上的钢筋混凝土结构。因此，保护混凝土免受氯离子腐蚀既紧迫又重要。在这项工作中，我们报告了多层混凝土可以屏蔽氯离子。我们配制了五种混凝土A、B、C、D和E，它们由不同比例的水泥、沙子和胶水制成，并制作了六层（ABACAD）圆柱扩散屏蔽层和背景介质E。模拟结果表明，六层质量扩散屏蔽层可以保护混凝土免受氯离子渗透，而实验结果表明，扩散通量线中外圆外的浓度梯度平行且相等，外圆外的等浓度线平行，内圆中的浓度梯度小于外圆中的浓度梯度。
