Development of a Simple Repair Method Using Structural Bonding Tape to Stop Water Leakage from Joints of Small-Scale Concrete Canals

The study of small-scale concrete canals which had been repaired using simple methods under direct management by farmers or facility managers revealed that the main cause of deterioration of these canals was water leakage caused by failures of joints between sections of the concrete. And the study also revealed that the usual repair methods were insufficiently durable and simple. To solve these problems, a simple repair method was developed in which the canal joints are covered with structural bonding tape and sealant to prevent water leakage. This method satisfied the performance requirements (leak prevention, adhesion, and allowing expansion and contraction of the joint). Moreover, the developed method made farmers possible to repair canal joints in a short time, and no defects in the repaired joints appeared for at least 2 years.