Hodul Jakub, Majerová Jana, Drochytka Rostislav, Dvořák Richard, Topolář Libor, Pazdera Luboš
Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Brno University of Technology, Veveri 95, 602 00 Brno, Czech Republic.
Faculty of Civil Engineering, Institute of Physics, Brno University of Technology, Veveri 95, 602 00 Brno, Czech Republic.
Materials (Basel). 2020 Jul 8;13(14):3051. doi: 10.3390/ma13143051.
The cured-in-place pipe (CIPP) method is currently the most frequently used approach for the renovation of piping without digging; this technology is suitable for pipes made from all types of material. The authors of this paper examined how chemical substances and increased temperature change samples of CIPP with vinyl-ester resin taken from a simulated installation. Changes were observed at several levels: visually via a digital optical microscope, through changes of short-term bending properties and by observation of the activity of the sample structure by means of acoustic emission (AE). Interdependencies among the observed parameters were examined, specifically, the cumulative number of hits (cnt)/deflection and flexural properties/mechanic wave velocity. The test results prove that after three weeks of immersion in a simulated aggressive environment that mirrors what may happen to CIPP in real conditions, short-term mechanical properties change. This is also proven by the results of the AE measurements. For clarity, the results include images from a digital optical microscope. In addition, this paper proves that CIPP samples have good resistance to the action of organic and inorganic acids and to increased temperatures. After three weeks of exposure to a temperature of 100 °C the CIPP flexural properties of the samples had even improved.
原位固化管道（CIPP）法是目前最常用的不开挖管道修复方法；该技术适用于各种材质的管道。本文作者研究了化学物质和温度升高如何改变取自模拟安装的乙烯基酯树脂CIPP样本。在几个层面观察到了变化：通过数字光学显微镜进行视觉观察、通过短期弯曲性能的变化以及通过声发射（AE）观察样本结构的活性。研究了观察到的参数之间的相互依存关系，具体而言，即撞击次数累计值（cnt）/挠度以及弯曲性能/机械波速度。测试结果证明，在模拟侵蚀性环境中浸泡三周后（该环境反映了CIPP在实际情况下可能遭遇的情况），短期机械性能发生了变化。声发射测量结果也证实了这一点。为清晰起见，结果中包括了数字光学显微镜拍摄的图像。此外，本文证明CIPP样本对有机和无机酸的作用以及温度升高具有良好的耐受性。在暴露于100°C的温度三周后，样本的CIPP弯曲性能甚至有所改善。
