Технология ремонта бетонных облицовок каналов битумно-полимерной мастикой

Abstract

Purpose: development of technology for repairing canal linings concrete with bitumen-polymer mastic using one- and two-component latex emulsion to reduce water loss through defects in the concrete lining. Materials and methods: the technology of repairing the damaged canal lining concrete coating includes: preparation of the base for the protective coating; preparation of bitumen-polymer mastic for its application (manually) or spraying (mechanized) over the entire repaired area; preparation of equipment, mechanisms and necessary inventory; preparation for the use of material components (reagent (component A) and hardener (component B)) for mechanized application; the process of applying bitumen-polymer mastic to the repaired area. Results: according to the results of a scientific research, when repairing the internal junctions of the bottom and slopes of canal concrete linings, it is necessary to arrange fillets that have a triangle with sides 10–50 mm long in their cross-section. The use of fillets when joining concrete linings will avoid excessive consumption of repair material. The application of a one-component material is carried out manually using a spatula to repair minor damage and reduce losses through them, and the application of a two-component mastic will allow mechanized repair of the largest (areal) damage. Conclusions: the application of one- and two-component cold-curing bitumen-polymer mastic for repairing concrete lining of irrigation canals to various damages on their surface (cracks, shears, concrete scaling, destroyed seams, etc.) is considered. Technological operations for the repair and restoration of canal concrete linings (a technological map for the concrete surfaces repair with a mechanized polymer composite material has been developed), including five stages of work are presented.