Controlling chloride ions diffusion in concrete.

Controlling chloride ions diffusion in concrete.
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DOI:
10.1038/srep03359
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发表时间:
2013-11-28
期刊:
影响因子:
4.6
通讯作者:
Song, Runxia
Song, Runxia
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zeng, Lunwu;Song, Runxia

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混凝土中钢筋的腐蚀主要是由于氯离子和铁离子之间的化学反应。这对钢筋混凝土结构,特别是海上钢筋混凝土结构是一个严重的威胁。因此,对混凝土进行氯离子腐蚀防护显得尤为迫切和重要。在这项工作中,我们报告多层混凝土可以掩盖氯离子。配制了不同水泥、砂、胶配比的A、B、C、D、E五种混凝土,制作了六层(ABACAD)圆柱体扩散罩和背景介质E。模拟结果表明,六层质量扩散罩可以有效地保护混凝土免受氯离子渗透,而实验结果表明,扩散通量线外圆外的浓度梯度平行且均匀,外圆外的等浓度线平行,内圆内的浓度梯度小于外圆外的浓度梯度。
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.
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