Rehman Ali, Ali Majid
Civil Engineering Department, Capital University of Science and Technology, Islamabad 45750, Pakistan.
Materials (Basel). 2024 Aug 12;17(16):4000. doi: 10.3390/ma17164000.
Losses in irrigation canals occur during the process of water transportation. In irrigation conveyance water losses, seepage loss is the main contributor to total water loss. The most problematic factors are cracks and settlement of the lined canal in canal lining structures. Water loss occurs in earth channels, mainly due to erosion and the permeability of the material. The concrete, as it does not present cracks, will have a less impermeable layer. Usually, seepage loss comprises 20-30% of the total water loss, and it can be reduced to 15-20% with canal linings. By enhancing the flexure and split tensile strength of concrete, the rate of cracking in the canal lining can be controlled. Concrete's split tensile strength is one of the most important factors in crack control. The behavior (compressive, flexural, and split tensile properties, water absorption, linear shrinkage mass loss, etc.) of hybrid polypropylene and jute fiber-reinforced concrete (HPJF-RC) for the application of canal linings was studied. In this experimental work, a total of nine mixes were made with different lengths and contents of hybrid polypropylene and jute fiber-reinforced concrete (HPJF-RC) and a control mix. The SEM analysis was performed to explore the hybrid fiber cracking mechanism and the bonding of fibers with the concrete. The crack arresting mechanism of the HPJF-RC will help to reduce water losses in concrete canal linings. With this modern material, the water losses in canal linings can be minimized. The results of this experimental work would be helpful as a reference for both industry experts and academic researchers interested in the advancement of HPJF-RC composites.
灌溉渠道的水量损失发生在输水过程中。在灌溉输水过程中的水量损失中，渗漏损失是总水量损失的主要原因。渠道衬砌结构中最成问题的因素是衬砌渠道的裂缝和沉降。土渠会发生水量损失，主要原因是侵蚀和材料的渗透性。混凝土由于不存在裂缝，其防渗层效果会更好。通常，渗漏损失占总水量损失的20%-30%，采用渠道衬砌后可将其降至15%-20%。通过提高混凝土的抗折强度和劈裂抗拉强度，可以控制渠道衬砌的开裂率。混凝土的劈裂抗拉强度是裂缝控制的最重要因素之一。研究了混杂聚丙烯和黄麻纤维增强混凝土（HPJF-RC）用于渠道衬砌时的性能（抗压、抗折和劈裂抗拉性能、吸水率、线性收缩质量损失等）。在这项实验工作中，总共制作了九种不同长度和含量的混杂聚丙烯和黄麻纤维增强混凝土（HPJF-RC）配合比以及一种对照配合比。进行了扫描电子显微镜（SEM）分析，以探究混杂纤维的开裂机理以及纤维与混凝土的粘结情况。HPJF-RC的阻裂机理将有助于减少混凝土渠道衬砌中的水量损失。使用这种现代材料，可以将渠道衬砌中的水量损失降至最低。这项实验工作的结果将为对HPJF-RC复合材料发展感兴趣的行业专家和学术研究人员提供有益的参考。
