| 摘要 |
FIELD: water facilities and hydraulic structures, particularly to repair joints in concrete and reinforced concrete linings of irrigation channels and water supply systems. ^ SUBSTANCE: control joint comprises packing, joint sealant and sliding member. The sliding member is formed of two polyethylene bands with partition layer of 0.5 - 1.5 mm thickness arranged in-between and created of Vaseline or other plastic frost-resistant lubricant. Lower polyethylene band of sliding member is arranged along porous packing perimeter in air-tight manner to prevent ingress of water infiltrating through the lining in packing pores, which leads to water freezing in the pores in winter period, to prevent damage thereof. ^ EFFECT: increased quality of joints, reliability and service life. ^ 2 cl, 2 dwg |
