Korea Institute of Civil Engineering and Building Technology, Department of Land, Water and Environment Research, 283, Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Korea.
Department of Engineering Technology, Indiana University-Purdue University Indianapolis (IUPUI), 799 W. Michigan St. ET 314J, Indianapolis, IN 46202, USA.
Int J Environ Res Public Health. 2020 Mar 20;17(6):2073. doi: 10.3390/ijerph17062073.
Cured-in-place pipe (CIPP), as a kind of trenchless sewer rehabilitation technology, is a method to repair sewer pipe using unsaturated polyester resin. This study develops a CIPP liner using hot water or steam curing as well as glass fiber, in contrast to traditional methods, which use nonwoven fabric. Composite material samples were fabricated by combining liner materials using various methods, and the structural characteristics of the liners were compared and analyzed through short- and long-term flexural strength tests. A long-term test was conducted for 10,000 h, and the results revealed 13.3 times higher flexural strength and 8 times higher flexural modulus than the American Society for Testing Materials minimum criteria for CIPP short-term properties. The maximum creep retention factor was 0.64, thereby reducing the design thickness of the CIPP by up to 54%. The structural characteristics also improved when glass fibers were mixed with traditional CIPP liner, making it possible to reduce the thickness by 30%. Glass fibers result in high structural strength when combined with unsaturated polyester resin. Structural strength increased, even when glass fibers were mixed with traditional CIPP liner. The main contribution of this research is the development of a high strength CIPP liner and improvement of the structural properties of CIPP lining without using the specially formulated resin or lining materials.
原位固化管道（CIPP）作为一种非开挖下水道修复技术，是一种使用不饱和聚酯树脂修复下水道管道的方法。本研究开发了一种使用热水或蒸汽固化以及玻璃纤维的 CIPP 衬里，与传统方法使用无纺纤维不同。通过将衬里材料以各种方式组合，制造了复合材料样品，并通过短期和长期弯曲强度测试对衬里的结构特性进行了比较和分析。进行了为期 10000 小时的长期测试，结果显示弯曲强度比美国材料试验协会（ASTM）CIPP 短期性能的最低标准高 13.3 倍，弯曲模量高 8 倍。最大蠕变保持系数为 0.64，从而将 CIPP 的设计厚度减少了 54%。当玻璃纤维与传统的 CIPP 衬里混合时，结构特性也得到了改善，厚度可减少 30%。玻璃纤维与不饱和聚酯树脂结合时会产生较高的结构强度，即使与传统的 CIPP 衬里混合，结构强度也会增加。本研究的主要贡献是开发了一种高强度的 CIPP 衬里，并在不使用特殊配方树脂或衬里材料的情况下改善了 CIPP 衬里的结构性能。
