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首页> 外文期刊>Physica, B. Condensed Matter >Neutron imaging of water penetration into cracked steel reinforced concrete
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Neutron imaging of water penetration into cracked steel reinforced concrete

机译：渗入开裂钢筋混凝土的水的中子成像

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摘要

Service life and durability of reinforced concrete structures have become a crucial issue because of the economical and ecological implications. Service life of reinforced concrete structures is often limited by penetration of water and chemical compounds dissolved in water into the porous cement-based material. By now it is well-known that cracks in reinforced concrete are preferential paths for ingress of aggressive substances. Neutron radiography was successfully applied to study the process of water penetration into cracked steel reinforced concrete. In addition, the effectiveness of integral water repellent concrete to prevent ingress of water and salt solutions was investigated. Results are described in detail in this contribution. It will be shown that neutron radiography is a powerful method to visualize the process of water penetration into cracked and uncracked cement-based materials. On the basis of the obtained experimental data, it is possible to quantify the time-dependent water distributions in concrete with high accuracy and spatial resolution. It is of particular interest that penetration of water and salt solutions into damaged interfaces between concrete and steel can be visualized by means of neutron radiography. Deteriorating processes in cracked reinforced concrete structures can be studied in a completely new way. This advanced technology will help and find adequate ways to improve durability and service life of reinforced concrete structures. This will mean at the same time an essential contribution to improved sustainabihty.
机译：由于经济和生态方面的原因，钢筋混凝土结构的使用寿命和耐久性已成为至关重要的问题。钢筋混凝土结构的使用寿命通常受到水和溶解在水中的化合物渗透到多孔水泥基材料中的限制。到目前为止，众所周知，钢筋混凝土中的裂缝是侵蚀性物质进入的优先途径。中子射线照相术已成功地用于研究水渗入开裂的钢筋混凝土中的过程。另外，研究了整体防水混凝土防止水和盐溶液进入的有效性。在此贡献中详细描述了结果。结果表明，中子射线照相术是一种可视化水渗透到破裂和未破裂的水泥基材料中的强大方法。根据获得的实验数据，可以高精度和空间分辨率量化混凝土中随时间变化的水分布。特别令人感兴趣的是，可以通过中子射线照相术来观察水和盐溶液渗透到混凝土和钢之间受损的界面中。可以用全新的方式研究开裂的钢筋混凝土结构中的劣化过程。这项先进的技术将帮助并找到适当的方法来提高钢筋混凝土结构的耐久性和使用寿命。同时，这将意味着对改善可持续性的重要贡献。

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