When joints or cracks of irrigation canals are repaired, endorsement of water tightness and crack follow-up capability for the subsequent variations in opening widths is of primary importance. Using sprayed strain hardening cement composite (hereafter denoted as ECC) expected to…
When joints or cracks of irrigation canals are repaired, endorsement of water tightness and crack follow-up capability for the subsequent variations in opening widths is of primary importance. Using sprayed strain hardening cement composite (hereafter denoted as ECC) expected to meet the above requirements, laboratory and full-scale experiments were performed and applicability of ECC as a repair material for irriga- tion canals was discussed. It was confirmed that ECC can form multiple fine cracks to accommodate variations in opening widths of cracks and joints, crack dispersion capability can be improved by introducing isolation layer and the cracks are fine enough to expect self-healing effects that greatly enhances the water tightness. Full-scale experiment has also confirmed that the variations of joint opening width can be greatly reduced when ECC is continuously applied across the joints.